en standards (2)

Chemical composition of stainless steels to BS EN 10088-2IntroductionBS EN 10088-2 is the material standard for stainless steel sheet, plate and strip for general purposes. A total of 83 stainless steel grades are listed, including 19 ferritic, 14 martensitic, 2 precipitation hardening, 40 austenitic and 8 austenitic-ferritic (duplex) grades. The chemical compositions of these stainless steels are shown in this article.As an alternative to scanning down the list try the 'find' facility on your keyboard, using the 'Ctrl' and 'F' keys together. Type in the term you are looking for in the dialog box that then appears.The data given is not intended to replace that shown in individual standards to which reference should always be made.

BS EN 10088-2:2005 EditionBS EN 10088-2 was originally published in 1995. The second, current version, BS EN 10088-2:2005, has superseded BS EN 10088-2:1995, which was withdrawn by BSi on 20th June 2005. The tables shown here only have the 2005 composition ranges.There have been 17 new grades added and one ferritic grade, 1.4605 and one precipitation hardening grade,1.4532 removed. The new grades are:special ferritic grades 1.4595 and 1.4589 standard martensitic grades 1.4024, 1.4419 and 1.4110special martensitic grades 1.4422 and 1.4423special austenitic grades 1.4315, 1.4319, 1.4369, 1.4565, 1.4597,1.4652 and 1.4659special duplex (austenitic-ferritic) grades 1.4424,1.4477,1.4655These have been added into the tables as they are in the standard, where their compositions best fit, rather than in strict numerical order.The number of decimal places of elements including chromium, nickel and in some cases molybdenum have also been reduced. For example in the 1995 edition the chromium range for grade 1.4306 was shown as 18.00 to 20.00. The 2005 version has this as 18.0 to 20.0. On the other hand, the molybdenum range for grade 1.4401 has been left as 2.00 to 2.50, whereas for grade 1.4434 the range has been changed from 3.00 to 4.00. It is now 3.0 to 4.0.Mill test certificates with certified items to the 2005 edition of the standard should only have the number of decimal places for each element as shown in the standard.It is important to carefully check the standard in cases of dispute.A separate, important change has been the chromium range of grades 1.4301 and 1.4311. In 1995 these were 17.00 to 19.50 but in 2005 the minimums have been raised and are now 17.5 to 19.5. The permissible product analysis tolerances on values for cast analysis, shown in Table 5 of the standard are unchanged. For example, for a cast of 1.4301 grade, with a specified chromium range of 17.5 to 19.5, the tolerance on a product check sample is still + or -

0.20, not + or - 0.2 as might be expected. A single check sample on cast with a declared analysis of say, 18.1 must therefore be between 17.90 and 18.30.See table below for full details of permitted deviations of product analysi

BS EN 10088-2 chemical composition tablesDesignation Chemical composition % by mass max unless stated

Steel name Steel number

C Si Mn P S N Cr Mo Ni Others

Ferritic stainless steels - standard grades

X2CrNi12 1.4003 0.030 1.00 1.500.040

0.015 0.030 10.5/12.5

- 0.30/1.00

-

X2CrTi12 1.4512 0.030 1.00 1.00 0.040

0.015 - 10.5/12.5

- - Ti: 6(C+N)/0.65

X6CrNiTi12 1.4516 0.08 0.70 1.50 0.040

0.015 - 10.5/12.5

- 0.50/1.50

Ti: 0.05/0.35

X6Cr13 1.4000 0.08 1.00 1.00 0.040

0.015 -12.0/14.0

- - -

X6CrAl13 1.4002 0.08 1.00 1.00 0.040

0.015 -12.0/14.0

- - Al: 0.10/0.30

X6Cr17 1.4016 0.08 1.00 1.00 0.040

0.015 -16.0/18.0

- - -

X3CrTi17 1.4510 0.05 1.00 1.00 0.040

0.015 - 16.0/18.0

- - Ti: 4(C+N)+0.15/0.80

X3CrNb17 1.4511 0.05 1.00 1.00 0.040

0.015 - 16.0/18.0

- - Nb :12C/1.00

X6CrMo17-1 1.4113 0.08 1.00 1.00 0.040

0.015 - 16.0/18.0

0.90/1.40

- -

X2CrMoTi18-2

1.4521 0.025 1.00 1.00 0.040

0.015 0.030 17.0/20.0

1.80/2.50

- Ti: 4(C+N)+0.15/0.80

Ferritic stainless steels - special grades

X2CrTi17 1.4520 0.025 0.50 0.50 0.040

0.015 0.015 16.0/18.0

- - Ti: 0.30/0.60

X1CrNb15 1.4595 0.020 1.00 1.00 0.025

0.015 0.020 14.0/16.0

- 0.20/0.60

-

X2CrMoTi17-1

1.4513 0.025 1.00 1.00 0.040

0.015 0.015 16.0/18.0

0.80/1.40

- Ti: 0.30/0.60

X6CrNi17-1 1.4017 0.08 1.00 1.00 0.040

0.015 - 16.0/18.0

- 1.20/1.60

-

X5CrNiMoTi15-2

1.4589 0.08 1.00 1.00 0.040

0.015 - 13.5/15.5

0.20/1.20

1.00/2.50

Ti: 0.30/0.50

X6CrMoNb17-1

1.4526 0.08 1.00 1.00 0.040

0.015 0.040 16.0/18.0

0.80/1.40

- Nb:7(C+N)+0.10/1.00

X2CrNbZr17 1.4590 0.030 1.00 1.00 0.040

0.015 - 16.0/17.5

- - Zr: >7(C+N)+0.15

Nb: 0.35/0.55

X2CrTiNb18 1.4509 0.030 1.00 1.00 0.040

0.015 - 17.5/18.5

- -Ti: 0.10/0.60Nb: 3C+0.30/1.00

X2CrMoTi29-4

1.4592 0.025 1.00 1.00 0.030

0.010 0.045 28.0/30.0

3.50/4.50

- Ti: 4(C+N)+0.15/0.80

Martensitic stainless steels - standard grades

X12Cr13 1.4006 0.08/0.15

1.00 1.50 0.040

0.015 - 11.5/13.5

- 0.75 -

X15Cr13 1.4024 0.12/0.17

1.00 1.00 0.040

0.015 - 12.0/14.0

- - -

X20Cr13 1.4021 0.16/0.25

1.00 1.50 0.040

0.015 - 12.0/14.0

- - -

X30Cr13 1.4028 0.26/0.35

1.00 1.50 0.040

0.015 - 12.0/14.0

- - -

X39Cr13 1.4031 0.36/0.42

1.00 1.00 0.040

0.015 - 12.5/14.5

- - -

X46Cr13 1.4034 0.43/0.50

1.00 1.00 0.040

0.015 - 12.5/14.5

- - -

X38CrMo14 1.4419 0.36/0.42

1.00 1.00 0.040

0.015 - 13.0/14.5

0.60/1.00

- -

X55CrMo14 1.4110 0.48/0.60

1.00 1.00 0.040

0.015 - 13.0/15.0

0.50/0.80

- V: 0.15

X50CrMoV15

1.4116 0.45/0.55

1.00 1.00 0.040

0.015 - 14.0/15.0

0.50/0.80

- V: 0.10/0.20

X39CrMo17-1

1.4122 0.33/0.45

1.00 1.50 0.040

0.015 - 15.5/17.5

0.80/1.30

1.00 -

X3CrNiMo13-4

1.4313 0.05 0.70 1.50 0.040

0.015 - 12.0/14.0

0.30/0.70

3.5/4.5

N: >0.020

X4CrNiMo16-5-1

1.4418 0.06 0.70 1.50 0.040

0.015 - 15.0/17.0

0.80/1.50

4.0/6.0

N: >0.020

Martensitic and precipitation-hardening steels - special grades X1CrNiMoCu12-5-2

1.4422 0.020 0.50 2.00 0.040

0.003 0.020 11.0/13.0

1.30/1.80

4.0/5.0

Cu 0.20/0.80

X1CrNiMoCu12-7-3

1.4423 0.020 0.50 2.00 0.040

0.003 0.020 11.0/13.0

2.30/2.80

6.0/7.0

Cu 0.20/0.80

X5CrNiCuNb16-4

1.4542 0.07 0.70 1.50 0.040

0.015 - 15.0/17.0

0.60 3.0/5.0

Cu 3.0/5.0 Nb 5C/0.45

X7CrNiAl17-7

1.4568 0.09 0.70 1.00 0.040

0.015 - 16.0/18.0

- 6.5/7.8

Al: 0.70/1.50

Austenitic stainless steels - standard grades

X10CrNi18-8 1.4310 0.05/0.15

2.00 2.00 0.045

0.015 0.11 16.0/19.0

0.80 6.0/9.5

-

X2CrNiN18-7

1.4318 0.030 1.00 2.00 0.045

0.015 0.10/0.20

16.5/18.5

- 6.0/8.0

-

X2CrNi18-9 1.4307 0.030 1.00 2.00 0.045

0.015 0.11 17.5/19.5

- 8.0/10.5

-

X2CrNi19-11 1.4306 0.030 1.00 2.00 0.045

0.015 0.11 18.0/20.0

- 10.0/12.0

-

X2CrNiN18-10

1.4311 0.030 1.00 2.00 0.045

0.015 0.12/0.22

17.5/19.5

- 8.5/11.5

-

X5CrNi18-10 1.4301 0.07 1.00 2.00 0.045

0.015 0.11 17.5/19.5

- 8.0/10.5

-

X8CrNiS18-9

1.4305 0.10 1.00 2.00 0.045

0.15/0.35

0.11 17.0/19.0

- 8.0/10.0

Cu: 1.00

X6CrNiTi18-10

1.4541 0.08 1.00 2.00 0.045

0.015 - 17.0/19.0

- 9.0/12.0

Ti: 5C/0.70

X4CrNi18-12 1.4303 0.06 1.00 2.00 0.045

0.015 0.11 17.0/19.0

- 11.0/13.0

-

X2CrNiMo17-12-2

1.4404 0.030 1.00 2.00 0.045

0.015 0.11 16.5/18.5

2.00/2.50

10.0/13.0

-

X2CrNiMoN17-11-2

1.4406 0.030 1.00 2.00 0.045

0.015 0.12/0.22

16.5/18.5

2.00/2.50

10.0/12.0

-

X5CrNiMo17-12-2

1.4401 0.07 1.00 2.00 0.045

0.015 0.11 16.5/18.5

2.00/2.50

10.0/13.0

-

X6CrNiMoTi17-12-2

1.4571 0.08 1.00 2.00 0.045

0.015 - 16.5/18.5

2.00/2.50

10.5/13.5

Ti: 5C/0.70

X2CrNiMo17-12-3

1.4432 0.030 1.00 2.00 0.045

0.015 0.11 16.5/18.5

2.50/3.00

10.5/13.0

-

X2CrNiMo18-14-3

1.4435 0.030 1.00 2.00 0.045

0.015 0.11 17.0/19.0

2.50/3.00

12.5/15.0

-

X2CrNiMoN17-13-5

1.4439 0.030 1.00 2.00 0.045

0.015 0.12/0.22

16.5/18.5

4.0/5.0

12.5/14.5

-

X1NiCrMoCu25-20-5

1.4539 0.020 0.70 2.00 0.030

0.010 0.15 19.0/21.0

4.0/5.0

24.0/26.0

Cu: 1.20/2.00

Austenitic stainless steels - special grades

X5CrNi17-7 1.4319 0.07 1.00 2.00 0.045

0.030 0.11 16.0/18.0

- 6.0/8.0

-

X5CrNiN19-9

1.4315 0.06 1.00 2.00 0.045

0.015 0.12/0.22

18.0/20.0

- 8.0/11.0

-

X1CrNi25-21 1.4335 0.020 0.25 2.00 0.025

0.010 0.11 24.0/26.0

0.20 20.0/22.0

-

X6CrNiNb18-10

1.4550 0.08 1.00 2.00 0.045

0.015 - 17.0/19.0

- 9.0/12.0

Nb: 10xC/1.00

X1CrNiMoN25-22-2

1.4466 0.020 0.70 2.00 0.025

0.010 0.10/0.16

24.0/26.0

2.00/2.50

21.0/23.0

-

X6CrNiMoN 1.4580 0.08 1.00 2.00 0.0 0.015 - 16.5/1 2.00/2 10.5/1 Nb:

b17-12-2 45 8.5 .50 3.5 10xC/1.00 X2CrNiMoN17-3-3

1.4429 0.030 1.00 2.00 0.045

0.015 0.12/0.22

16.5/18.5

2.50/3.00

11.0/14.0

-

X3CrNiMo17-13-3

1.4436 0.05 1.00 2.00 0.045

0.015 0.11 16.5/18.5

2.50/3.00

10.5/13.0

-

X2CrNiMoN18-12-4

1.4434 0.030 1.00 2.00 0.045

0.015 0.10/0.20

16.5/19.5

3.0/4.0

10.5/14.0

-

X2CrNiMo18-15-4

1.4438 0.030 1.00 2.00 0.045

0.015 0.11 17.5/19.5

3.0/4.0

13.0/16.0

-

X1CrNiMoCuN24-22-8

1.4652 0.020 0.50 2.00/4.0

0.030

0.005 0.45/0.55

23.0/25.0

7.0/8.0

21.0/23.0

Cu: 0.30/0.60

X1CrNiSi18-15-4

1.4361 0.015 3.7/4.5

2.00 0.025

0.010 0.11 16.5/18.5

0.20 14.0/16.0

-

X11CrNiMnN19-8-6

1.4369 0.07/0.15

0.50/1.00

5.0/7.5

0.030

0.015 0.20/0.30

17.5/19.5

- 6.5/8.5

-

X12CrMnNiN17-7-5

1.4372 0.15 1.00 5.5/7.5

0.045

0.015 0.05/0.25

16.0/18.0

- 3.5/5.5

-

X2CrMnNiN17-7-5

1.4371 0.030 1.00 6.0/8.0

0.045

0.015 0.15/0.20

16.0/17.0

- 3.5/5.5

-

X12CrMnNiN18-9-5

1.4373 0.15 1.00 7.5/10.5

0.045

0.015 0.05/0.25

17.0/19.0

- 4.0/6.0

-

X9CrMnCuNB17-8-3

1.4597 0.10 2.00 6.5/8.5

0.040

0.030 0.15/0.30

16.0/18.0

1.00 2.00 B:0.0005/0.0050Cu: 2.00/3.5

X1NiCrMo31-27-4

1.4563 0.020 0.70 2.00 0.030

0.010 0.11 26.0/28.0

3.0/4.0

30.0/32.0

Cu: 0.70/1.50

X1CrNiMoCuN25-25-5

1.4537 0.020 0.70 2.00 0.030

0.010 0.17/0.25

24.0/26.0

4.7/5.7

24.0/27.0

Cu: 1.00/2.00

X1CrNiMoCuN20-18-7

1.4547 0.020 0.70 1.00 0.030

0.010 0.18/0.25

19.5/20.5

6.0/7.0

17.5/18.5

Cu: 0.50/1.00

X1CrNiMoCuNW24-22-6

1.4659 0.020 0.70 2.00/4.0

0.030

0.010 0.35/0.50

23.0/25.0

5.5/6.5

21.0/23.0

Cu: 1.00/2.00W: 1.50/2.50

X1NiCrMoCuN25-20-7

1.4529 0.020 0.50 1.00 0.030

0.010 0.15/0.25

19.0/21.0

6.0/7.0

24.0/26.0

Cu: 0.50/1.50

X2CrNiMnMoN25-18-6-5

1.4565 0.030 1.00 5.0/7.0

0.030

0.015 0.30/0.60

24.0/26.0

4.0/5.0

16.0/19.0

Nb: 0.15

Austenitic-ferritic stainless steels-standard grades X2CrNiN23-4

1.4362 0.030 1.00 2.00 0.035

0.015 0.05/0.20

22.0/24.0

0.10/0.60

3.5/5.5

Cu 0.10/0.60

X2CrNiMoN12-5-3

1.4462 0.030 1.00 2.000.035

0.0150.10/0.22

21.0/23.0

2.50/3.50

4.5/6.5

-

Austenitic-ferritic stainless steels-special grades X2CrNiCuN23-4

1.4655 0.030 1.00 2.000.035

0.0150.05/0.20

22.0/24.0

0.10/0.60

3.5/5.5

Cu: 1.00/3.00

X2CrNiMoN29-7-2

1.4477 0.030 0.50 0.80/1.50

0.030

0.0150.30/0.40

28.0/30.0

1.50/2.60

5.8/7.5

Cu: 0.80

X2CrNiMoCuN25-6-3

1.4507 0.030 0.70 2.000.035

0.0150.20/0.30

24.0/26.0

3.0/4.0

6.0/8.0

Cu: 1.00/2.50

X2CrNiMoN25-7-4

1.4410 0.030 1.00 2.000.035

0.0150.24/0.35

24.0/26.0

3.0/4.5

6.0/8.0

-

X2CrNiMoCuWN25-7-4

1.4501 0.030 1.00 1.000.035

0.0150.20/0.30

24.0/26.0

3.0/4.0

6.0/8.0

Cu: 0.50/1.00W: 0.50/1.00

X2CrNiMoSi18-5-3

1.4424 0.0301.40/2.00

1.20/2.00

0.035

0.0150.05/0.10

18.0/19.0

2.50/3.0

4.5/5.2

-

Permissible product analysis tolerances on the cast analysis ranges given in EN 10088-2

Related Articles

1. Chemical composition of stainless steels to BS EN 10088-3 2. Chemical composition of stainless steels to BS EN 10095 3. Ambient temperature mechanical properties of martensitic stainless steels to BS

EN 10088-2 4. Ambient temperature mechanical properties of ferritic stainless steels to BS EN

10088-2 5. Ambient temperature mechanical properties of precipitation hardening stainless

steels to BS EN 10088-2 6. Ambient temperature mechanical properties of austenitic stainless steels to BS EN

10088-2

Element

Specified Limits on Cast Analysis (%)

Permissible tolerance on product analysis (%)

Carbon

< 0.030 +0.005> 0.030 < 0.20 ±0.01> 0.20 < 0.50 ±0.02> 0.50 < 0.60 ±0.03

Silicon

< 1.00 ±0.05> 1.00 < 4.5 ±0.10

Manganese

< 1.00 +0.03 > 1.00 < 2.00 ±0.04 > 2.00 < 10.5 ±0.10

Phosphorus

< 0.045 +0.005

Sulphur

< 0.015 +0.003> 0.015 < 0.030 ±0.005 > 0.15 < 0.35 ±0.02

Nitrogen

< 0.11 ±0.01 > 0.11 < 0.50 ±0.02

Chromium

> 10.5 < 15.0 ±0.15 > 15.0 < 20.0 ±0.20 > 20.0 < 30.0 ±0.25

Copper

< 1.00 ±0.07 > 1.00 < 5.0 ±0.10

Molybdenum

<0.60 ±0.03 > 0.60 < 1.75 ±0.05 > 1.75 < 8.0 ±0.10

Niobium

< 1.00 ±0.05

Nickel

< 1.00 ±0.03 > 1.00 < 5.0 ±0.07 > 5.0 < 10.0 ±0.10 > 10.0 < 20.0 ±0.15 > 20.0 < 32.0 ±0.20

Aluminium

> 0.10 < 0.30 ±0.05 > 0.30 < 1.50 ±0.10

Boron

< 0.0050

±0.0005

Titanium

< 0.80 ±0.05

Tungsten

< 2.50 ±0.05

Vanadium

< 0.20 ±0.03

7. Ambient temperature mechanical properties of austenitic-ferritic (duplex) stainless steels to BS EN 10088-2

Ambient temperature mechanical properties of austenitic stainless steels to BS EN 10088-2IntroductionBS EN 10088-2 is the material standard for stainless steel sheet, plate and strip for general purposes. This article gives the 0.2% and 1.0% proof strength, tensile strength and elongation of the 40 austenitic grades specified. The standard also specifies includes impact properties and resistance to intergranular corrosion acceptance criteria. For reasons of space, these are omitted from the tables shown here.As an alternative to scanning down the list try the 'find' facility on your keyboard, using the 'Ctrl' and 'F' keys together. Type in the term you are looking for in the dialog box that then appears.The data given is not intended to replace that shown in individual standards to which reference should always be made.

BS EN 10088-2:2005 Edition BS EN 10088-2 was originally published in 1995. The second, current version, BS EN 10088-2:2005, has superseded BS EN 10088-2:1995, which was withdrawn by BSi on 20th June 2005. The tables shown here only have the 2005 tensile property ranges of the austenitic steels. Seven new 'special' austenitic grades, 1.4315, 1.4319, 1.4369, 1.4565, 1.4597, 4652 and 1.4659 have been added.The maximum thickness ranges for the specification of mechanical properties have been extended for strip products.Cold rolled strip, C has been increased from 6 to 8mm max Hot rolled strip, H has been increased from 12 to 13.5mm maxThe only changes to tensile properties are increases of maximum tensile strength for grades 1.4307 and 1.4306. These have been increased from 650 or 670, depending on product form, to 700 N/mm2.

BS EN 10088-2 mechanical properties - austenitic stainless steels

Designation Mechanical properties min unless stated

Steel nameSteel

number

Product Proof strength Tensile

strength Rm

N/mm2

Elongation5),6) %Form

2)

Max thickness

mm

Rp0.23),4)

N/mm2Rp1.0

3),4)

N/mm2

Austenitic stainless steels in the solution annealed condition1) - standard gradesX10CrNi18-8

1.4310 C 8 250 280 600/950 40

X2CrNiN18-7

1.4318C 8 350 380 650/850 40H 13.5 330 370 650/850 40P 75 330 370 630/830 45

X2CrNi18-9 1.4307C 8 220 250 520/700 45H 13.5 200 240 520/700 45P 75 200 240 500/700 45

X2CrNi19-11

1.4306C 8 220 250 520/700 45H 13.5 200 240 520/700 45P 75 200 240 500/700 45

X2CrNiN18-10

1.4311C 8 290 320 550/750 40H 13.5 270 310 550/750 40P 75 270 310 550/750 40

X5CrNi18-10

1.4301C 8 230 260 540/750 45H 13.5 210 250 520/720 45P 75 210 250 520/720 45

X8CrNiS18-9

1.4305 P 75 190 230 500/700 35

X6CrNiTi18-10

1.4541C 8 220 250 520/720 40H 13.5 200 240 520/720 40P 75 200 240 500/700 40

X4CrNi18-12

1.4303 C 8 220 250 500/650 45

X2CrNiMo17-12-2

1.4404C 8 240 270 530/680 40H 13.5 220 260 530/680 40P 75 220 260 520/670 45

X2CrNiMoN17-11-2

1.4406C 8 300 330 580/780 40H 13.5 280 320 580/780 40P 75 280 320 580/780 40

X5CrNiMo17-12-2

1.4401C 8 240 270 530/680 40H 13.5 220 260 530/680 40P 75 220 260 520/670 45

X6CrNiMoTi17-12-2

1.4571C 8 240 270 540/690 40H 13.5 220 260 540/690 40P 75 220 260 520/670 40

X2CrNiMo17-12-3

1.4432C 8 240 270 550/700 40H 13.5 220 260 550/700 40P 75 220 260 520/670 45

X2CrNiMo18-14-3

1.4435C 8 240 270 550/700 40H 13.5 220 260 550/700 40P 75 220 260 520/670 45

X2CrNiMoN17-13-5

1.4439 C 8 290 320 580/780 35H 13.5 270 310 580/780 35

P 75 270 310 580/780 40

X1NiCrMoCu25-20-5

1.4539C 8 240 270 530/730 35H 13.5 220 260 530/730 35P 75 220 260 520/720 35

Austenitic stainless steels in the solution annealed condition1) - special grades

X5CrNi17-7 1.4319C 3 230 260 550/750 45H 6 230 260 550/750 45

X5CrNiN19-9

1.4315C 8 290 330 500/720 40H 13.5 270 310 500/750 40P 75 270 310 500/750 40

X1CrNi25-21

1.4335 P 75 200 240 470/670 40

X6CrNiNb18-10

1.4550C 8 220 250 520/720 40H 13.5 200 240 520/720 40P 75 200 240 500/700 40

X1CrNiMn25-22-2

1.4466 P 75 250 290 540/740 40

X6CrNiMoN17-13-2

1.4580 P 75 220 260 520/720 40

X2CrNiMoN17-13-3

1.4429C 8 300 330 580/780 35H 13.5 280 320 580/780 35P 75 280 320 580/780 40

X3CrNiMo17-13-3

1.4436C 8 240 270 550/700 40H 13.5 220 260 550/700 40P 75 220 260 530/730 40

X2CrNiMoN18-12-4

1.4434C 8 290 320 570/770 35H 13.5 270 310 570/770 35P 75 270 310 540/740 40

X2CrNiMo18-15-4

1.4438C 8 240 270 550/700 35H 13.5 220 260 550/700 35P 75 220 260 520/720 40

X1CrNiMoCuN24-22-8

1.4652C 8 430 470 750/1000 40H 13.5 430 470 750/1000 40P 75 430 470 750/1000 40

X1CrNiSi18-15-4

1.4361 P 75 220 260 530/730 40

X11CrNiMnN19-8-6

1.4369 C 4 340 370 750/950 35

X12CrMnNiN17-7-5

1.4372C 8 350 380 750/950 45H 13.5 330 370 750/950 45P 75 330 370 750/950 40

1.4371 C 8 300 330 650/850 45

X2CrMnNiN17-7-5

H 13.5 280 320 650/850 45P 75 280 320 630/830 35

X12CrMnNiN18-9-5

1.4373C 8 340 370 680/880 45H 13.5 320 360 680/880 45P 75 320 360 600/800 35

X8CrMnCuNB17-8-3

1.4597C 8 300 330 580/780 40H 13.5 300 330 580/780 40

X1NiCrMoCu31-27-4

1.4563 P 75 220 260 500/700 40

X1CrNiMoCuN25-25-5

1.4537 P 75 290 330 600/800 40

X1CrNiMoCuN20-18-7

1.4547C 8 320 350 650/850 35H 13.5 300 340 650/850 35P 75 300 340 650/850 40

X1CrNiMoCuNW24-22-6

1.4659 P 75 420 460 800/1000 40

X1NiCrMoCuN25-20-7

1.4529 P 75 300 340 650/850 40

X2CrNiMnMoN25-18-6-5

1.4565C 8 420 460 800/950 30H 10 420 460 800/950 30P 40 420 460 800/950 30

Note8. The solution treatment may be omitted if the conditions for hot working and

subsequent cooling are such that the requirements for the mechanical properties of the product and the resistance to intergranular corrosion as defined in EN ISO 3651-2 are obtained.

9. C= Cold rolled strip; H= hot rolled strip; P= hot rolled plate. 10. If, in the case of strip in rolling widths<300mm, longitudinal test pieces are taken,

the minimum values are reduced as follow: proof strength: minus 15N/mm2

elongation for constant gauge length: minus 5% elongation for proportional gauge length: minus 2%

11. For continuously hot rolled products, 20N/mm2 higher minimum values of Rp0.2 and 10N/mm2higher minimum values of Rp1.0 may be agreed at the time of enquiry and order.

12. The values apply for test pieces with a gauge length of 80mm and a width of 20mm. Test pieces with a gauge length of 50mm and a width of 12.5mm can also be used.

13. The values apply for test pieces with a gauge length of 5.65 So0.5

Related Articles

1. Chemical composition of stainless steels to BS EN 10088-2

2. Ambient temperature mechanical properties of ferritic stainless steels to BS EN 10088-2

3. Ambient temperature mechanical properties of martensitic stainless steels to BS EN 10088-2

4. Ambient temperature mechanical properties of precipitation hardening stainless steels to BS EN 10088-2

5. Ambient temperature mechanical properties of austenitic-ferritic (duplex) stainless steels to BS EN 10088-2

Ambient temperature mechanical properties of ferritic stainless steels to BS EN 10088-2IntroductionBS EN 10088-2 is the material standard for stainless steel sheet, plate and strip for general purposes. This article gives the 0.2% and 1.0% proof strength, tensile strength and elongation of the 19 ferritic grades specified. The standard also specifies the resistance to intergranular corrosion acceptance criteria. For reasons of space, these are omitted from the tables shown here.As an alternative to scanning down the list try the 'find' facility on your keyboard, using the 'Ctrl' and 'F' keys together. Type in the term you are looking for in the dialog box that then appears.The data given is not intended to replace that shown in individual standards to which reference should always be made.

BS EN 10088-2:2005 Edition BS EN 10088-2 was originally published in 1995. The second, current version, BS EN 10088-2:2005, has superseded BS EN 10088-2:1995, which was withdrawn by BSi on 20th June 2005. The tables shown here only have the 2005 tensile property ranges of the ferritic steels. Two new 'special' ferritic grades, 1.4589 and 1.4589 have been added and grade 1.4605 removed. The specified proof and tensile strengths for grade 1.4017 have been lowered.The maximum thickness ranges for the specification of mechanical properties have been extended for strip products.Cold rolled strip, C has been increased from 6 to 8mm max Hot rolled strip, H has been increased from 12 to 13.5mm max

BS EN 10088-2 mechanical properties - ferritic stainless steels

Designation Mechanical properties min unless statedSteel name

ProductProof strength

Rp0.2 N/mm2Elongation A80mm

2) for < 3mm A3) for > 3mm

Steel numb

er

Tensile strength Rm

N/mm2

Form1)

Max thicknes

s mm

Longitudinal

Transverse

%

Ferritic stainless steels at room temperatures in the annealed condition- standard grades

X2CrNi12

1.4003C 8 280 320 450/650 20H 13.5 280 320 450/650 20P 254) 250 280 450/650 18

X2CrTi12

1.4512C 8 210 220 380/560 25H 13.5 210 220 380/560 25

X6CrNiTi12

1.4516C 8 280 320 450/650 23H 13.5 280 320 450/650 23P 254) 250 280 450/650 20

X6Cr13 1.4000C 8 240 250 400/600 19H 13.5 220 230 400/600 19P 254) 220 230 400/600 19

X6CrAl13

1.4002C 8 230 250 400/600 17H 13.5 210 230 400/600 17P 254) 210 230 400/600 17

X6Cr17 1.4016 C 8 260 280 450/600 20H 13.5 240 260 450/600 18P 254) 240 260 430/630 20

X3CrTi17

1.4510C 8 230 240 420/600 23H 13.5 230 240 420/600 23

X3CrNb17

1.4511 C 8 230 240 420/600 23

X6CrMo17-1

1.4113C 8 260 280 450/630 18H 13.5 260 280 450/630 18

X2CrMoTi18-2

1.4521C 8 300 320 420/640 20H 13.5 280 300 400/600 20P 12 280 300 420/620 20

Ferritic stainless steels at room temperatures in the annealed condition- special grades

X2CrTi17

1.4520 C 8 180 200 380/530 24

X1CrNb15

1.4595 C 8 210 220 380/560 25

X2CrMoTi17-1

1.4513 C 8 200 220 400/550 23

X6CrNi17-1

1.4017 C 8 330 350 500/750 12

1.4589 C 8 400 420 550/750 16

X5CrNiMoTi15-2

H 13.5 360 380 550/750 14

X6CrMoNb17-1

1.4526 C 8 280 300 480/560 25

X2CrNbZr17

1.4590 C 8 230 250 400/550 23

X2CrTiNb18`

1.4509 C 8 230 250 430/630 18

X2CrMoTi29-4

1.4592 C 8 430 450 550/700 20

Note14. C= Cold rolled strip; H= hot rolled strip; P= hot rolled plate. 15. The values apply for test pieces with a gauge length of 80mm and a width of

20mm. Test pieces with a gauge length of 50mm and a width of 12.5mm can also be used.


17. For thicknesses above 25mm, the mechanical properties can be agreed.

Related Articles

6. Chemical composition of stainless steels to BS EN 10088-2 7. Ambient temperature mechanical properties of martensitic stainless steels to BS

EN 10088-2 8. Ambient temperature mechanical properties of precipitation hardening stainless


10088-2 10. Ambient temperature mechanical properties of austenitic-ferritic (duplex)

stainless steels to BS EN 10088-2

Ambient temperature mechanical properties of martensitic stainless steels to BS EN 10088-2IntroductionBS EN 10088-2 is the material standard for stainless steel sheet, plate and strip for general purposes. This article gives the 0.2% proof strength, tensile strength, elongation and hardness levels, where specified, of the 14 martensitic grades listed in the standard. The standard also specifies includes impact properties fro some grades. For reasons of space, these are omitted from the tables shown here.

As an alternative to scanning down the list try the 'find' facility on your keyboard, using the 'Ctrl' and 'F' keys together. Type in the term you are looking for in the dialog box that then appears.The data given is not intended to replace that shown in individual standards to which reference should always be made.

BS EN 10088-2:2005 Edition BS EN 10088-2 was originally published in 1995. The second, current version, BS EN 10088-2:2005, has superseded BS EN 10088-2:1995, which was withdrawn by BSi on 20th June 2005. The tables shown here only have the 2005 tensile and where appropriate, hardness, property ranges of the martensitic steels. Three new standard, 1.4024 1.4419 and 1.4110 and two new special 1.4422 and 1.4423 martensitic grades have been added.The maximum thickness ranges for the specification of mechanical properties have been extended for strip products.Cold rolled strip, C has been increased from 6 to 8mm max Hot rolled strip, H has been increased from 12 to 13.5mm maxGrade 1.4021 has had tensile maxima added for cold rolled strip products. Grades 1.4313 and 1.4418 have had changes made to the specified proof strengths. In addition the elongation minimum for 1.4313 and the tensile range for 1.4418 have been changed.

BS EN 10088-2 mechanical properties - martensitic stainless steels


Steel name

Steel number

ProductHeat

treatment condition2)

Proof strength

Rp0.2N/mm2

Tensile strength

RmN/mm2

Elongation A80mm4)

for < 3mm A5) for >3mm

Hardness3)

Form1)

Thickness mm

max.%

HRB

HB

HRC

HV

Martensitic stainless steels in the heat treated condition-standard steels

X12Cr13 1.4006

C 8 A - <600 20 90200

- -

H 13.5 A - <600 20 90200

- -

P6) 75 QT550 400 550/750 15 - - - -P6) 75 QT650 450 650/850 12 - - - -

X15Cr13 1.4024

C 8 A - <650 20 90200

- -

H 13.5 A - <650 20 90200

- -

P 75 A - - - - - - -P 75 QT550 400 550/750 15 - - - -P 75 QT650 450 650/850 12 - - - -

X20Cr13 1.4021

C 3 QT - - - - -44/50

440/530

C 8 A - <700 15 95225

- -

H 13.5 A - <700 15 95225

- -

P6) 75 QT650 450 650/850 12 - - - -P6) 75 QT750 550 750/950 10 - - - -

X30Cr13 1.4028

C 3 QT - - - - -45/51

450/550

C 8 A - <740 15 97235

- -

H 13.5 A - <740 15 97235

- -

P6) 75 QT800 600 800/1000 10 - - - -

X39Cr13 1.4031

C 3 QT - - - - -47/53

480/580

C 8 A - <760 12 98240

- -

H 13.5 A - <760 12 98240

- -

X46Cr13 1.4034C 8 A - <780 12 99

245

- -

H 13.5 A - <780 12 99245

- -

X38CrMo14

1.4419

C 3 QT - - - - -46/52

450/560

C 4 A - <760 15 97235

- -

H 6.5 A - <760 15 97235

- -

X55CrMo14

1.4110

C 8 A - <850 12100

280

- -

H 13.5 A - <850 12100

280

- -

P 75 A - - - - - - -

X46CrMoV15

1.4116C 8 A - <850 12

100

280

- -

H 13.5 A - <850 12100

280

- -

X39CrMo17-1

1.4122

C 3 QT - - - - -47/53

480/580

C 8 A - <900 12100

280

- -

H 13.5 A - <900 12100

280

- -

X3CrNiMo13-4

1.4313P 75 QT780 630 780/980 15 - - - -P 75 QT900 800 900/1100 11 - - - -

X4CrNiMo16-5-1

1.4418 P 75 QT840 660 840/1100 14 - - - -

Martensitic stainless steels in the heat treated condition-special steels

X1CrNiMoCu12-5-2

1.4422H 13.5 A 550 750/950 15

100

300

- -

P 75 QT650 550 750/950 15 - - -<300

X1CrNiMoCu12-7-3

1.4423H 13.5 A 550 750/950 15

100

300

- -

P 75 QT650 550 750/950 15 - - -<300

Note18. C= Cold rolled strip; H= hot rolled strip; P= hot rolled plate. 19. A= annealed, QT= quenched and tempered. 20. The Brinell or Vickers or Rockwell hardness is normally determined for product

forms C and H in heat-treatment condition A. The tensile test shall be carried out in referee testing.



23. Plates may also be delivered in the annealed condition; in such cases the mechanical properties are to be agreed at the time of enquiry and order.

Related Articles

11. Chemical composition of stainless steels to BS EN 10088-2 12. Ambient temperature mechanical properties of ferritic stainless steels to BS EN

10088-2 13. Ambient temperature mechanical properties of precipitation hardening stainless


10088-2 15. Ambient temperature mechanical properties of austenitic-ferritic (duplex)

stainless steels to BS EN 10088-2

Ambient temperature mechanical properties of austenitic-ferritic (duplex) stainless steels to BS EN 10088-2IntroductionBS EN 10088-2 is the material standard for stainless steel sheet, plate and strip for general purposes. This article gives the 0.2% and 1.0% proof strength, tensile strength and elongation of the 8 austenitic-ferritic (duplex) grades specified. The standard also specifies includes impact properties and resistance to intergranular corrosion acceptance criteria. For reasons of space, these are omitted from the tables shown here.As an alternative to scanning down the list try the 'find' facility on your keyboard, using the 'Ctrl' and 'F' keys together. Type in the term you are looking for in the dialog box that then appears.The data given is not intended to replace that shown in individual standards to which reference should always be made.

BS EN 10088-2:2005 Edition BS EN 10088-2 was originally published in 1995. The second, current version, BS EN 10088-2:2005, has superseded BS EN 10088-2:1995, which was withdrawn by BSi on 20th June 2005. The tables shown here only have the 2005 tensile property ranges of the austenitic-ferritic (duplex) steels. Three new 'special' duplex grades, 1.4655, 1.4477 and 1.4424 have been added.The maximum thickness ranges for the specification of mechanical properties have been extended for strip products.Cold rolled strip, C has been increased from 6 to 8mm max Hot rolled strip, H has been increased from 12 to 13.5mm max

Changes, usually involving increases, have been made to some of the specified proof, tensile and elongation properties for grades 1.4362, 1.4462, 1.4507 and 1.4410.

BS EN 10088-2 mechanical properties - austenitic-ferritic (duplex) stainless steels


Steel name

Steel numbe

r

ProductProof strength Rp0.2

2),3) N/mm2

Tensile strength Rm

N/mm2

Elongation4),5) %Form1)

Max thickness

mmAustenitic-ferritic stainless steels in the solution annealed condition-standard

grades

X2CrNiN23-4

1.4362C 8 450 650/850 20H 13.5 400 650/850 20P 75 400 630/800 25

X2CrNiMoN22-5-3

1.4462C 8 500 700/950 20H 13.5 460 700/950 25P 75 460 640/840 25

Austenitic-ferritic stainless steels in the solution annealed condition-special grades

X2CrNiCuN23-4

1.4655C 8 420 600/850 20H 13.5 400 600/850 20P 75 400 630/800 25

X2CrNiMoN29-7-2

1.4477C 8 650 800/1050 20H 13.5 550 750/1000 20P 75 550 750/1000 20

X2CrNiMoCuN25-6-3

1.4507C 8 550 750/1000 20H 13.5 530 750/1000 20P 75 530 730/930 25

X2CrNiMoN25-7-4

1.4410C 8 550 750/1000 20H 13.5 530 750/1000 20P 75 530 730/930 20

X2CrNiMoCuWN25-7-4

1.4501 P 75 530 730/930 25

X2CrNiMoSi18-5-3

1.4424C 8 450 700/900 25H 13.5 450 700/900 25P 75 400 680/900 25

Note24. C= Cold rolled strip; H= hot rolled strip; P= hot rolled plate. 25. If, in the case of strip in rolling widths < 300mm, longitudinal test pieces are

taken, the minimum proof strength values are reduced by 15N/mm2

26. For continuously hot rolled products, 20N/mm2 higher minimum values of Rp0.2 may be agreed at the time of enquiry and order.



Ambient temperature mechanical properties of precipitation hardening stainless steels to BS EN 10088-2IntroductionBS EN 10088-2 is the material standard for stainless steel sheet, plate and strip for general purposes. This article gives the 0.2% proof strength, tensile strength and elongation levels, where specified, of the 2 precipitation hardening grades listed in the standard. (Grade 1.4532, that appeared in the 1995 version of BS EN 10088 is not specified in the 2005 editions.) The data given is not intended to replace that shown in individual standards to which reference should always be made.

BS EN 10088-2:2005 Edition BS EN 10088-2 was originally published in 1995. The second, current version, BS EN 10088-2:2005, has superseded BS EN 10088-2:1995, which was withdrawn by BSi on 20th June 2005. The tables shown here have the 2005 tensile property ranges of the 2 precipitation hardening steels 1.4542 and 1.4568. The specified properties have not been changed for these grades.The maximum thickness ranges for the specification of mechanical properties have been extended for strip products. Cold rolled strip, C has been increased from 6 to 8mm max

BS EN 10088-2 mechanical properties - precipitation hardening stainless steels


Steel name

Steel numbe

r

ProductHeat

treatment condition2)

Proof strength Rp0.2 N/mm2

Tensile strength Rm

N/mm2

Elongation3),4) %Form1)

Thickness mm max

Precipitation hardening stainless steels in the heat treated condition-special grades (martensitic steel)

X5CrNiCuNb16-4

1.4542 C 8 AT5) - <1275 5C 8 P13006) 1150 1300 3C 8 P9006) 700 900 6P 50 P10707) 1000 1070/1270 10

P 50 P9507) 800 950/1150 12P 50 P8507) 600 850/1050 14P 50 SR6308) - <1050 -

X7CrAl17-7

1.4568C 8 AT5),9) - <1030 19C 8 P14506) 1310 1450 2

Note29. C= Cold rolled strip; H= hot rolled strip; P= hot rolled plate. 30. AT = solution annealed; P = precipitation hardened; SR= strength relieved. 31. The values apply for test pieces with a gauge length of 80mm and a width of

20mm. Test pieces with a gauge length of 50mm and a width of 12.5mm can also be used.


33. Delivery condition. 34. Condition of application; other precipitation hardening temperatures may be

agreed. 35. If ordered in the finally treated condition. 36. Delivery condition for further processing; final treatment according to table A.3

of BS EN 10088-2. 37. For spring-hard rolled condition see EN 10151

Tolerances to ISO 9445 for cold rolled narrow and wide strip, plate/sheet and cut lengths

General

This standard is designed to bring together tolerances for cold rolled narrow and wide strip. It has officially superseded EN 10258 and EN 10259 although of course customers and suppliers are entitled to continue to use these standards. In most respects the tolerances from these standards are identical to the ones in this new ISO standard. The major differences are:

1. Additional table for wide strip is included which is based on Japanese practice. 2. Slightly different edge camber tolerances than in EN 10259 for wide strip. 3. Provision for width tolerance on wide strip with mill edges.

Narrow strip is defined as having a rolled width of < 600mm and thickness < 3mm. This is the same definition as in EN 10258. This covers material slit from such products and cut lengths.Wide strip is defined as having a rolled width of 600 - 2100 mm from 0.3-8.0mm thick. It therefore includes material slit from this product with actual width < 600mm and sheet/plate

The phrase "specified thickness" is preferred to "nominal thickness" in this ISO standard.There is a view that the combination of all cold rolled products into one standard can be confusing. There are moves towards separating out narrow and wide products into two standards. This summary adopts this approach as for every tolerance type there are different values for narrow and wide products.

Narrow strip

Thickness tolerance

1. This table is identical to the table in EN 10258. 2. By agreement the tolerances may alternatively be totally + or totally - or unevenly distributed. In any

case the total tolerance shall be as in the table.

3. For thicknesses below 0.05mm the values for the tolerances are to be agreed at the time of the enquiry and order.

Tolerances on width for narrow cold rolled strip and cut lengths

Specified

Thickness (t)

Specified Width (w)

w < 40 40 < w < 125 125 < w < 250 250 < w < 600

Normal Fine (F) Precision (P)




t < 0.25 +0.17/-0 +0.17/-0 +0.10/-0 +0.20/-0 +0.15/-0 +0.12/-0 +0.25/-0 +0.20/-0 +0.15/-0 +0.50/-0 +0.50/-0 +0.40/-0

0.25 < t < 0.50 +0.20/-0 +0.15/-0 +0.12/-0 +0.25/-0 +0.20/-0 +0.15/-0 +0.30/-0 +0.22/-0 +0.17/-0 +0.60/-0 +0.50/0 +0.40/-0

0.50 < t < 1.00 +0.25/-0 +0.20/-0 +0.15/-0 +0.25/-0 +0.22/-0 +0.17/-0 +0.40/-0 +0.25/-0 +0.20/-0 +0.70/-0 +0.60/-0 +0.50/-0

1.00 < t < 1.50 +0.25/-0 +0.22/-0 +0.15/-0 +0.30/-0 +0.25/-0 +0.17/-0 +0.50/-0 +0.30/-0 +0.22/-0 +1.0/-0 +0.70/-0 +0.60/-0

1.50 < t < 2.50 --- --- --- +0.40/-0 +0.25/-0 +0.20/-0 +0.60/-0 +0.40/-0 +0.25/-0 +1.0/-0 +0.80/-0 +0.60/-0

2.50 < t < 3.00 --- --- --- +0.50/-0 +0.3/-0 +0.25/-0 +0.6/-0 +0.40/-0 +0.25/-0 +1.2/-0 +1.0/-0 +0.80/-0

Tolerances on specified thickness for narrow cold rolled strip

Specified Thickness (t) w < 125 125 < w < 250 250 < w < 600

Normal Fine (F) Precision(P) Normal Fine (F) Precision(P) Normal Fine (F) Precision(P)

0.05 < t < 0.10 ±0.10t ±0.06t ±0.04t ±0.12t ±0.10t ±0.08t ±0.15t ±0.10t ±0.08t

0.10 < t < 0.15 ± 0.010 ±0.008 ±0.006 ±0.015 ±0.012 ±0.008 ±0.020 ±0.015 ±0.010

0.15 < t < 0.20 ±0.015 ±0.010 ±0.008 ±0.020 ±0.012 ±0.010 ±0.025 ±0.015 ±0.012

0.20 < t < 0.25 ±0.015 ±0.012 ±0.008 ±0.020 ±0.015 ±0.010 ±0.025 ±0.020 ±0.012

0.25 < t < 0.30 ±0.017 ±0.012 ±0.009 ±0.025 ±0.015 ±0.012 ±0.030 ±0.020 ±0.015

0.30 < t < 0.40 ±0.020 ±0.015 ±0.010 ±0.025 ±0.020 ±0.012 ±0.030 ±0.025 ±0.015

0.40 < t < 0.50 ±0.025 ±0.020 ±0.012 ±0.030 ±0.020 ±0.015 ±0.035 ±0.025 ±0.018

0.50 < t < 0.60 ±0.030 ±0.020 ±0.014 ±0.030 ±0.025 ±0.015 ±0.040 ±0.030 ±0.020

0.60 < t < 0.80 ±0.030 ±0.025 ±0.015 ±0.035 ±0.030 ±0.018 ±0.040 ±0.035 ±0.025

0.80 < t < 1.00 ±0.030 ±0.025 ±0.018 ±0.040 ±0.030 ±0.020 ±0.050 ±0.035 ±0.025

1.00 < t < 1.20 ±0.035 ±0.030 ±0.020 ±0.045 ±0.035 ±0.025 ±0.050 ±0.040 ±0.030

1.20 < t < 1.50 ±0.040 ±0.030 ±0.020 ±0.050 ±0.035 ±0.025 ±0.060 ±0.045 ±0.030

1.50 < t < 2.00 ±0.050 ±0.035 ±0.025 ±0.060 ±0.040 ±0.030 ±0.070 ±0.050 ±0.035

2.00 < t < 2.50 ±0.050 ±0.035 ±0.025 ±0.070 ±0.045 ±0.030 ±0.080 ±0.060 ±0.040

2.50 < t < 3.00 ±0.060 ±0.045 ±0.030 ±0.070 ±0.050 ±0.035 ±0.090 ±0.070 ±0.045

Width tolerance

1. This table is identical to the one in EN 10258. 2. By agreement, the tolerances may be equally ± or all negative. In both cases, the total range of the

tolerances shall be as in the table.

Length tolerance

Length tolerances for cut lengths from narrow strip

Specified length LTolerances

Normal Special

L < 2000 +3/-0 +1.5/-0

2000 < L < 4000 +5/-0 +2/-0

1. This is identical to the table in EN 10258

Edge camber

Tolerances on edge camber for cold rolled narrow strip and cut lengths

Specified width w

Edge camber tolerances for measuring lengths

1000 2000 1000 2000

Normal Precision

10 < w < 25 4 16 1.5 6

25 < w < 40 3 12 1.25 5

40 < w < 125 2 8 1.0 4

125 < w < 600 1.5 6 0.75 3

1. This table is identical to the one in EN 10258. 2. If applicable, both measuring lengths shall be used. 3. These tolerances do not apply to the work hardened condition. Any requirement for this material shall

be agreed at the time of enquiry and order.

Out of squareness

The out of squareness tolerance for cut lengths from narrow strip > 250mm shall not exceed 0.5% of the actual width of the product.For widths < 250mm the tolerances shall be agreed at the time of enquiry and order.These requirements are identical to those in EN 10258.

Flatness

The flatness tolerance for cut lengths from narrow strip shall not exceed 10mm for normal cases and 7mm where a special tolerance is required.This does not apply to material in the work hardened condition which must be agreed at the time of the enquiry and order.These requirements are identical to those in EN 10258.

Edge Waviness

For skin passed or stretch levelled narrow strip, the ratio of the wave height to wave length shall be a maximum of 0.03 for specified thicknesses < 1.00mm and a maximum of 0.02 for > 1.00mm.These requirements are identical to those in EN 10258.---------------------------------------------------------------------------------------------------------------------------------------------------------

Wide strip

Thickness tolerance

The standard allows for two methods for defining thicknesses tolerance:Method A - identical to EN 10259. Thickness is measured at any point located more than 20mm from the edge for slit edges and 30mm for mill edges.Method B - Thickness is measured at any point located more than 15mm from the edge for slit edges and 25mm for mill edges. This is similar to Japanese standards.

Tolerances on specified thickness for cold rolled wide strip Method A

Specified thickness (t) Normal tolerances for a nominal width w of Special tolerances (S) for a nominal width w of

w<1000 1000<w<1300 1300<w<2100 w<1000 1000<w<1300 1300<w<2100

t < 0.30 ±0.030 -- -- ±0.020 -- --

0.30 < t < 0.50 ±0.04 ±0.04 -- ±0.025 ±0.030 --

0.50 < t < 0.60 ±0.045 ±0.05 -- ±0.030 ±0.035 --

0.60 < t < 0.80 ±0.05 ±0.05 -- ±0.035 ±0.040 --

0.80 < t < 1.00 ±0.055 ±0.06 ±0.06 ±0.040 ±0.045 ±0.050

1.00 < t < 1.20 ±0.06 ±0.07 ±0.07 ±0.045 ±0.045 ±0.050

1.20 < t < 1.50 ±0.07 ±0.08 ±0.08 ±0.050 ±0.055 ±0.060

1.50 < t < 2.00 ±0.08 ±0.09 ±0.10 ±0.055 ±0.060 ±0.070

2.00 < t < 2.50 ±0.09 ±0.10 ±0.11 -- -- --

2.50 < t < 3.00 ±0.11 ±0.12 ±0.12 -- -- --

3.00 < t < 4.00 ±0.13 ±0.14 ±0.14 -- -- --

4.00 < t < 5.00 ±0.14 ±0.15 ±0.15 -- -- --

5.00 < t < 6.50 ±0.15 ±0.15 ±0.16 -- -- --

6.50 < t < 8.00 ±0.16 ±0.17 ±0.17

1. This table is similar to that in EN 10259 except that there is an extra line for 6.50 < t < 8.00. 2. Also there are some differences in the number of decimal places for Special tolerances. 3. Thickness is measured at any point located more than 20mm from the edge for slit edges and 30mm

for mill edges - defined as Method A.

4. For strip and cut lengths < 30mm wide the thickness shall be measured at the centre of the strip.

Tolerances on specified thickness for cold rolled wide strip Method B

Specified thickness (t) Normal tolerances for a nominal width w of Special tolerances (S) for a nominal width w of

w<1000 1000<w<1300 1300<w<2100 w<1000 1000<w<1300 1300<w<2100

t < 0.30 ±0.030 -- -- ±0.030 -- --

0.30 < t < 0.50 ±0.04 ±0.04 -- ±0.030 ±0.035 --

0.50 < t < 0.60 ±0.045 ±0.05 -- ±0.035 ±0.035 --

0.60 < t < 0.80 ±0.05 ±0.05 -- ±0.040 ±0.040 --

0.80 < t < 1.00 ±0.055 ±0.06 ±0.07 ±0.040 ±0.050 ±0.050

1.00 < t < 1.20 ±0.06 ±0.07 ±0.08 ±0.050 ±0.055 ±0.060

1.20 < t < 1.50 ±0.08 ±0.08 ±0.10 ±0.055 ±0.060 ±0.060

1.50 < t < 2.00 ±0.08 ±0.09 ±0.11 ±0.065 ±0.070 ±0.080

2.00 < t < 2.50 ±0.09 ±0.11 ±0.13 -- -- --

2.50 < t < 3.00 ±0.11 ±0.13 ±0.15 -- -- --

3.00 < t < 4.00 ±0.14 ±0.15 ±0.16 -- -- --

4.00 < t < 5.00 ±0.15 ±0.17 ±0.19 -- -- --

5.00 < t < 6.00 ±0.17 ±0.20 ±0.23 -- -- --

6.00 < t < 8.00 ±0.17 ±0.22 ±0.25

1. Thickness is measured at any point located more than 15mm from the edge for slit edges and 25mm for mill edges - defined as Method B.

2. For strip and cut lengths < 30mm wide the thickness shall be measured at the centre of the strip.

3. Note the difference in the last two thickness bands compared to Method A.

Width tolerance

Provision is made in this standard for width tolerances for mill edges.For wide strip and sheet/plate cut from wide strip with mill edges < 1000mm, the tolerance is +25/-0mm.For wider material the tolerance is +30/-0mm.For wide strip with slit edges the tolerances are as in the table below:

Tolerances on wide cold rolled strip and sheet/plate cut from wide strip

Specified thickness (t) Normal tolerances for a specfied width w of

Special tolerances (S)1) for a nominal width w of

w<125 125<w<250 250<w<600 600<w<1000 1000<w<2100 w<125 125<w<250 250<w<600

t < 1.00 +0.5/-0 +0.5/-0 +0.7/-0 +1.5/-0 +2.0/-0 +0.3/-0 +0.3/-0 +0.6/-0

1.00 < t < 1.50 +0.7/-0 +0.7/-0 +1.0/-0 +1.5/-0 +2.0/-0 +0.4/-0 +0.5/-0 +0.7/-0

1.50 < t < 2.50 +1.0/-0 +1.0/-0 +1.2/-0 +2.0/-0 +2.5/-0 +0.6/-0 +0.7/-0 +0.9/-0

2.50 < t < 3.50 +1.2/-0 +1.2/-0 +1.5/-0 +3.0/-0 +3.0/-0 +0.8/-0 +0.9/-0 +1.0/-0

3.50 < t < 8.00 +2.0/-0 +2.0/-0 +1.2/-0 +4.0/-0 +4.0/-0 -- -- --

1. By special agreement, products can be supplied with permissible undersizes on the nominal width. In this case, the values in this table apply as the oversize plus undersize range. E.g. 1.20 mm thick, 700 mm wide could be ordered to +1.0/-0.5mm by agreement.

2. For material with edges re-cut by shearing, the tolerances on width may by agreement be increased to 5mm

3. This table is similar to that in EN 10259 except that the highest nominal thickness is now 8.00mm.

Length tolerance

Length tolerances also have both 'normal' and 'special' tolerance ranges. 'Special' tolerance should be specifically requested. Each range is proportional to the length of the sheet or cut length, with a minimum tolerance at 2000mm length. Unlike the old standards, these tolerances apply for any length that can be supplied, and across the whole thickness range.

1. This is identical to that in EN 10259

Edge camber

Tolerances on edge camber for wide strip and plate/sheet from wide strip

Specified width (w)

Edge camber tolerances for measuring lengths

1000 2000

10 < w < 40 2.5 10

40 < w < 125 2 8

125 < w < 600 1.5 6

600 < w < 2100 1 4

1. If applicable both measuring lengths shall be used. 2. This table is the same as that in EN 10259 for widths from 40mm upwards. Two width bands in EN

10259 have been combined in this standard into the 10-40mm band and new values specified.

Out of Squareness

As in EN 10259 there are two ways to specify out of squareness and the values are identical to this standard.

Nominal Length LTolerances

Normal Special (S)

L < 2000 +5/-0 +3/-0

2000 < L +0.0025 x L/-0 +0.0015 x L/-0

Out of squareness is defined in Fig 2 below:

OROption 2 - shall not exceed the values in the table: All dimensions in mm Length L of sheet plate or cut length

Maximum difference in diagonal lengths

L < 3000 6

3000 < L < 6000 10

> 6000 15

Ordered format

When ordering an agreement may be made that the ordered format (i.e. width and length) be contained in every piece supplied. In this case, the tolerances on width, length, edge camber and out of squareness shall be agreed at the time of the enquiry and order.Flatness tolerance

The flatness tolerance of of strip, sheet/plate and cut length shall not exceed 10mm for normal cases and 7mm where a special tolerance (FS) is required for length < 3000mm and 12mm for normal cases and 8mm where a special tolerance (FS) is required for length > 3000mm. This is identical to the requirements of EN 10259.These requirements do not apply to work hardened material or condition 2D.The flatness can be measured in the following ways:a) For maximum deviation from a flat horizontal surface, with the product lying under its own mas on a flat surface, the maximum deviation from flatness in the maximum distance between the lower surface of the product and the flat horizontal surface.b) To measure the flatness, the product shall be laid on an approximately flat surface. Deviation with respect to flatness shall be taken as the greatest distance between the product and a straight edge placed upon it. The straight edge should be either 1000 or 2000mm long. It may be placed on the product at any position and in any direction. Only the position of the points of contact of product and straight edge shall be taken into account.

Unless otherwise agreed, the choice of measurement methid is left to the manufacturer. Edge waviness

For strip, the waviness of the edges, i.e. the ratio of wave height (h) to wave length (l) shall be max 0.03 for all thicknesses. This requirement does not apply to work hardened material or condition 2D.

Related Articles

1. Tolerances to BS EN 10258 for cold rolled narrow stainless steel strip 2. Tolerances to BS EN 10259 for cold rolled wide stainless steel strip 3. Tolerances to ISO 9444 for continuously rolled hot rolled strip, plate/sheet and cut lengths

Tolerances to ISO 9444 for continuously rolled hot rolled strip, plate/sheet and cut lengthsGeneralThis standard covers continuously rolled hot rolled flat products of all rolled widths < 2500mm in stainless steels. It therefore is designed to replace EN 10048 and EN 10051 for narrow and wide products respectively. The maximum width is increased to 2500 mm compared to EN 10051.The full use of ISO 9444 is awaiting the withdrawal of stainless steels from EN 10048 and EN 10051, However, it can be used by agreement between customer and supplier. Tolerances are defined for thickness is < 13mm. Special agreement is required for > 13mm.Two categories of steel are defined:Category A - all stainless steels not in Category BCategory B - stainless steels with Ni > 20% or Mo > 2% or N > 0.11%. It is somewhat ambiguous for steels where the specified N range is above and below the 0.11% level. This simple categorisation removes the apparent omission from EN 10051 of duplex and precipitation hardening steels. It also removes the difference between ferritic and martensitic grades and non-Mo austenitics. The following table shows the category for some of the more common stainless steels:

Steel Category for Common Stainless Steels

Category A Category B

1.4003 1.4016(430) 1.4301(304) 1.4307(304L) 1.4542 (17-4 PH) 1.4362(2304)?

1.4401(316) 1.4404(316L) 1.4462(2205) 1.4539(904L) 1.4547(254SMO)

Thickness

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There are 2 tables, one for hot rolled wide strip and sheet/plate cut from it and one for narrow strip and lengths cut from it.

Thickness tolerances for hot rolled wide strip

Specified thickness (t)

Tolerances on specified thickness for nominal width (w)

w < 1200 1200 < w < 1500 1500 < w < 1800 w > 1800

Category A Category B Category A Category B Category A Category B Category A Category B

t < 2.0 ± 0.22 ± 0.24 ± 0.25 ± 0.27 ± 0.27 ± 0.29 -- --

2.0 < t < 2.5 ± 0.23 ± 0.25 ± 0.27 ± 0.29 ± 0.30 ± 0.32 ± 0.33 ± 0.35

2.5 < t < 3.0 ± 0.26 ± 0.28 ± 0.29 ± 0.31 ± 0.31 ± 0.34 ± 0.34 ± 0.36

3.0 < t < 4.0 ± 0.29 ± 0.31 ± 0.31 ± 0.34 ± 0.34 ± 0.36 ± 0.35 ± 0.38

4.0 < t < 5.0 ± 0.31 ± 0.34 ± 0.34 ± 0.36 ± 0.36 ± 0.39 ± 0.38 ± 0.41

5.0 < t < 6.0 ± 0.34 ± 0.36 ± 0.36 ± 0.39 ± 0.38 ± 0.41 ± 0.40 ± 0.43

6.0 < t < 8.0 ± 0.38 ± 0.41 ± 0.39 ± 0.42 ± 0.40 ± 0.43 ± 0.46 ± 0.49

8.0 < t <10.0 ± 0.42 ± 0.45 ± 0.43 ± 0.46 ± 0.44 ± 0.48 ± 0.52 ± 0.56

10.0 < t <13.0 ± 0.46 ± 0.49 ± 0.47 ± 0.50 ± 0.48 ± 0.52 ± 0.56 ± 0.60

t >13.0 The tolerances have to be agreed at the time of enquiry and order

These tolerances include crownThe thickness shall be measured at any point at least 40mm from the edges for products with mill edges and at least 25mm from the edges for products with trimmed edges.The tolerances shall not apply to the uncropped ends of the coil for a total length L in metres which is calculated using the formula:L = 90/t (in mm) provided that the result does not exceed 20 metres per coil.Trimmed or sheared edges may have burrs.

Thickness tolerances for hot rolled narrow strip

Specified thickness (t)

Fine tolerances on specified thickness for widths < 600mm

Category FA Category FB

0.80 < t < 1.50 ± 0.12 ± 0.13

1.50 < t < 2.0 ± 0.14 ± 0.16

2.0 < t < 4.0 ± 0.16 ± 0.17

4.0 < t < 5.0 ± 0.17 ± 0.18

5.0 < t < 6.0 ± 0.18 ± 0.20

6.0 < t < 8.0 ± 0.19 ± 0.21

8.0 < t < 10.0 ± 0.21 ± 0.23

10.0 < t < 13.0 ± 0.23 ± 0.25

For widths up to 30mm, the thickness is measured at any point on the longitudinal axis.For widths above 30mm it is measured at any point at least 10mm or 15mm from the longitudinal edges for slit or mill edges respectively.

Thickness variations for strip intended for cold rolling

EN 10051 was somewhat ambiguous in this area. This standard is quite specific.

Permitted thickness difference within one coil for cold rolling wide strip

Specified thickness (t) Permitted thickness differences for width of strip w

w < 1200 1200 < w < 1500 1500 < w < 2500

t < 2.0 0.20 0.24 0.28

2.0 < t < 3.0 0.22 0.27 0.33

3.0 < t < 4.0

0.28 0.32 0.40 4.0 < t < 8.0

8.0 < t < 13.0

For narrow strip the difference in thickness throughout one coil shall not exceed:0.14mm for specified thicknesses < 4mm0.17mm for specified thicknesses > 4 < 8mm

Length tolerance

These apply to both wide and narrow products cut from coils

Specified length (L)Tolerances

Lower Upper

L < 2000 0 + 10

2000 < L < 20000 0 + 0.005 x L

L > 20000 To be agreed

The length shall be measured along one of the longer edges of the sheet/plate.

Width tolerance

For wide strip and sheet/plate cut from wide strip with thickness < 10mm, the tolerance on width is +20/-0 for mill edges and +5/-0 for slit edges. For thickness > 10mm, the width tolerance shall be agreed at the time of enquiry and order.For narrow strip and lengths cut from narrow strip with slit edges the width tolerances are as in the table below:

Tolerances on width for narrow strip and cut lengths

Specified width (w)Tolerances on width for specified thickness of

< 3.0 > 3.0 < 5.0 > 5.0 < 7.0 > 7.0 < 8.0 > 8.0 < 13.0

w < 250 +0.5/-0 +0.7/-0 +0.8/-0 +1.2/-0 +1.8/-0

250 < w < 600 +0.6/-0 +0.8/-0 +1.0/-0 +1.4/-0 +2.0/-0

For narrow strip and lengths cut from narrow strip with mill edges the width tolerances shall be agreed at the time of enquiry and order.

Flatness

For cut lengths from narrow strip the flatness tolerance measured on any 2000mm or less of length shall be 15mm.For plate/sheet cut from wide strip of thickness < 13mm, the flatness tolerance shall be as in table below.

Tolerances on flatness for sheet/plate

Specified width (w)Tolerances on flatness for category

A B

600 < w < 1200 23 26

1200 < w < 1500 30 33

w > 1500 38 42

The flatness shall be determined by measuring the deviation in distance between the product and a flat horizontal surface on which it is placed.

Out of squareness

This shall not exceed 1% of the actual width of the plate as defined by the diagram below:

Edge camber

For sheet/plate cut from wide strip edge camber shall not exceed 0.5% of the specified length for a specified length of < 5000mm.For sheet/plate cut from wide strip with a specified length > 5000mm, the edge camber shall not exceed 20mm for any length of 5000mm for sheet/plate with mill edges and 15mm for sheet/plate with slit edges.For cut lengths from narrow strip < 2mm, the tolerance on edge camber shall be agreed at time of enquiry and order.For cut lengths from narrow strip > 2mm, the tolerance on edge camber relative to a length of 2500mm shall be:- 20mm for cut lengths of widths < 40mm ------------------------(1)- 10mm for cut lengths of widths > 40mm and < 600mm ---(2)For measured lengths (L) other than 2500mm, the tolerance on edge camber shall be calculated on the basis of the following formula:Tolerance on edge camber = (L2/25002) x tolerance defined in (1) and (2) above, rounded up to nearest mm.For example, if measured on a length of 3000mm, the tolerances would be increased to 1.44 x 20mm and 1.44 x 10mm = 29mm and 15mm.

Edge camber is measured as in the diagram below:

Superposition of dimensions

By agreement at the time of enquiry and order the tolerances on out of squareness and edge camber may be replaced by a requirement that a perfect rectangle of the ordered dimensions can be superimposed on the delivered sheets/plates or cut lengths.

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1. Technical Information 2. About Stainless Steel 3. FAQ 4. Technical Library 5. Technical Enquiries

Featured Articles1. Tolerances - Proposed New Standards for Stainless Steel Flat Products 2. Structural Sections in Stainless Steel 3. European EN Standard Grade Summary 4. Tolerances to ISO 9445 for cold rolled narrow and wide strip, plate/sheet and cut lengths 5. Tolerances to ISO 9444 for continuously rolled hot rolled strip, plate/sheet and cut lengths 6. Tolerances to ISO 18286 for hot rolled stainless steel quarto plates 7. Specifying mechanically polished, brushed and buffed stainless steel finishes and their applications

Tolerances to ISO 18286 for hot rolled stainless steel quarto platesGeneral

This standard covers hot rolled stainless steel plates rolled on a reversing mill known as quarto plate. It may also be taken to cover plate rolled on a Steckel mill but taken out of the process before coiling has begun.For continously hot rolled plate (CPP), ISO 9444 is applicable. It replaces EN 10029 which was not specifically for stainless steel. It removes some anomalies and ambiguities from that standard.One interpretation of the standard is that no ground area of the plate may fall below the minimum thickness tolerance. This is in contrast to EN 10163 which was referred to in EN 10029 and allowed some areas to be below minimum thickness. The 4 Classes of thickness tolerance (A-D) in EN 10029 have been replaced by one class which is similar to Class B - minimum tolerance of 0.3mm under nominal thickness.There are no tolerances on the maximum difference allowed within a plate.The flatness tolerance is dependent on grade.Provision is made for different width and length tolerances depending on the method of cutting.


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Thickness

The tolerance under nominal thickness is 0.3mm.Tolerance on thickness for hot rolled quarto plate

Nominal thickness t

Width w

w < 2100 2100 < w < 3000 3000 < w < 3600 w > 3600

t < 10 +1.15 +1.30 +2.15 ---

10 < t < 20 +1.40 +1.55 +2.15 +2.30

20 < t < 25 +1.55 +1.65 +2.15 +2.55

25 < t < 50 +1.80 +1.90 +2.40 +2.95

50 < t < 75 +2.55 +2.75 +2.95 +3.15

75 < t < 100 +2.75 +2.95 +3.15 +3.35

100 < t < 150 +2.95 +3.15 +3.35 +3.55

150 < t < 200 +3.35 +3.55 +3.75 +3.95

200 < t < 250 +3.75 +3.95 +4.15 +4.35

1. It is not possible to make an exact comparison with EN 10029 as the thickness bands are different. However, the following comparison of some typical thicknesses gives an idea: Tolerances on thickness for typical plate sizes in EN 10029 and ISO 18286

Thickness Width EN 10029 Class B ISO 18286

5 2000 +1.2 +1.15

5 3000 +1.2 +2.15

10 2000 +1.4 +1.40

10 3000 +1.4 +2.15

30 2000 +1.9 +1.80

30 3000 +1.9 +2.40

50 2000 +2.5 +2.55

50 3000 +2.5 +2.95

100 2000 +2.9 +2.95

100 3000 +2.9 +3.35

2. In general, wider plate has more generous tolerances than in EN 10029.

3.

4. For plates with trimmed edges, the thickness shall be measured at any point > 10mm and < 75mm from a longitudinal edge.

Width and length tolerance

There are 3 classes of tolerance for width and length for plates with trimmed edges A - C. This is dependent on the method of cutting the plates.Class A - cutting method not specified. By implication includes shearing.Class B - flame-cut plate. Probably intended to mean plasma.

Class C - abrasive cut plate. Probably intended to mean water-jet cutting.There is no mention of other cutting methods such as laser.Tolerances on mill edge plate shall be agreed at the time of enquiry and order.

Tolerances on width for class A

Nominal width w Tolerances

lower upper

600 < w < 2000 0 +15

2000 < w < 3000 0 +20

w > 3000 0 +25

Tolerances on length for class A

Nominal length L Tolerances

lower upper

600 < L < 4000 0 + 20

4000 < L < 6000 0 + 30

6000 < L < 8000 0 + 40

8000 < L < 10000 0 + 50

10000 < L < 15000 0 + 75

15000 < L < 20000 0 +100

Tolerances on plates with a nominal length of > 20000mm shall be agreed at the time of enquiry and order.

Tolerances on width and length for Class B

Nominal thickness t Tolerances

lower upper

t < 50 0 +10

50 < t < 75 0 +13

75 < t < 150 0 +19

Tolerances on width and length for Class C

Nominal thickness t Tolerances

lower upper

t < 25 3.2 3.2

25 < t < 50 3.2 4.8

50 < t < 75 3.2 6.4

75 < t < 100 3.2 7.9

1. For plates of thickness > 100mm width and length tolerance for Class C must be agreed at the time of the enquiry and order.

Edge camber and out of squareness

For plate with trimmed edges, the edge camber shall not exceed 0.5% of the nominal length of the plate. Out of squareness shall not exceed 1% of the nominal width of the

plate. For comparison, EN 10029 has an edge camber of 0.2% and out of squareness of 1%.For plate with untrimmed edges in the enquiry and in the purchase order, the edge camber and out of squareness shall be limited so that it is possible to inscribe a rectangle of the nominal length and width of the ordered plate within the delivered size. In EN 10029, the inscribed rectangle definition was not restricted to plates with untrimmed edges.

Flatness

There are two levels of tolerance normal (Class N) and special (Class S). The class shall be specified at the time of enquiry and order. If not specified, the manufacturer can supply to either class.For both classes the tolerance is dependent on the steel type:Type A - All grades not of type BType B - stainless steel grades with Ni > 20% OR Mo > 2% or N > 0.11%.

Flatness tolerance Class N

Nominal thickness t

Steel Type A Steel Type B

Measuring length

1000 2000 1000 2000

4 < t < 5 9 14 12 17

5 < t < 8 8 12 11 15

8 < t < 15 7 10 10 14

15 < t < 25 7 10 10 13

25 < t < 40 6 9 9 12

40 < t < 250 5 8 8 11

1. Unless otherwise specified, the measuring length is at the manufacturer's discretion. 2. If the distance between the points of contact of the straight edge and plate is < 1000mm, the deviation

shall comply with the following:

Steel Type A - Maximum of 1% of the distance between the points of contact between > 300mm and < 1000mm.

Steel Type B - Maximum of 1.5% of the distance between the points of contact between > 300mm and < 1000mm.

but not exceeding the values in the table for Class N.

Flatness tolerance Class S

Nominal thickness t

Steel Type ASteel type B

Width < 2750 Width> 2750

Measuring length

1000 2000 1000 2000 1000 2000

3 < t < 8 4 8 5 10 Shall be agreed at time of enquiry and order 8 < t < 250 3 6 3 6

1. Unless otherwise specified, the measuring length is at the manufacturer's discretion. 2. If the distance between the points of contact of the straight edge and plate is < 1000mm, the deviation

shall comply with the following: Maximum of 0.5% of the distance between the points of contact but not exceeding the values in the table for Class S. (By implication, this note applies to steel type A since for steel type B, tolerances are agreed at the time of enquiry and order. However, the standard is somewhat unclear. It is also not clear why the 300mm minimum length does not apply for class S as compared with class N).

It is quite difficult to compare the flatness tolerances in EN 10029 and ISO 18286, as the definition of steel types is totally different. In EN 10029 which was for all steels, steel types were L and H split by yield strength above and below 460 N/mm2. This meant that most stainless steels fell into steel type L. Even the nitrogen strengthened steels were in this type. Therefore, 304 and 316 were given the same flatness tolerance. The effect of the new standard is to put Mo and N bearing steels into the steel type B and therefore giving less stringent flatness tolerances than previously.An approximate comparison is shown in the following table for a 10mm plate in various grades of steel using the 2000mm measuring length:

Comparison of flatness Class N EN 10029 and ISO 18286

Steel grade Tolerance EN 10029 Tolerance ISO 18286

1.4003 (3CR12) 11 10

1.4028 (420) 14 10

1.4301 (304) 11 10

1.4362 (2304) 11 10/14? (N is 0.05/0.020%)

1.4401 (316) 11 14

1.4410 (2507) 14 14

1.4462 (2205) 14 14

1.4501 (Zeron 100) 14 14

1.4542 (17-4 PH) 14 11

1.4547 (254SMO) 11 14

1.4845 (310) 11 14

It can be argued that neither standard is completely consistent on this subject. For example, martensitic grades in the quench and tempered condition or high yield strength PH grades are expected to have a better flatness than 316. This may not be realistic.

Related Articles

1. Tolerances to ISO 9444 for continuously rolled hot rolled strip, plate/sheet and cut lengths 2. Tolerances to EN 10029 for hot rolled plate 3mm and above 3. Tolerances to EN 10051 for continuously rolled hot rolled plate sheet and strip




Specifying mechanically polished, brushed and buffed stainless steel finishes and their applicationsIntroduction

Mechanical finishes for stainless steels are covered as finish codes G, J, K and P in BSEN 10088-2. Terms grinding, polishing, brushing and buffing even when used along with these codes are not sufficient to accurately define the finish. There can often be confusion about what these terms mean.To precisely specify a finish also requires agreed samples. Contamination rust staining on mechanically polished stainless steel surfaces is often the result of using contaminated finishing media, often via hand tools which have previously been used on carbon steel.See Euroinox publication The Mechanical Finishing of Decorative Stainless Steel Surfaces for more information.

Polishing

Both grinding and polishing involve the deliberate removal of metal from the surface using an abrasive. The resulting surface will have some directional marks, partially dependent on the grit size of abrasive used. In the case of the very fine abrasives used in polishing it should only be possible to see any 'directional marks' under a microscope. Viewed normally 1P/2P finishes should appear non-directional. Satin finishes (2K of BSEN 10088-2) are an intermediate between dull polished (2J of BSEN 10088-2) and bright polished (2P of BSEN 10088-2). These finishes can be enhanced by a final brushing operation.Mill finishes '1' and '2' are described in the article Specifying finishes for stainless steel flat products (sheet and plate)There is no accepted definition of an abrasive grain or grit size that differentiates grinding from polishing. As a guide, but not a definition, grit sizes of 80 and coarser would be associated with grinding, whereas grit sizes of 120 and finer are used in preparing polished finishes. Like polishing, which often involves using successively finer abrasive grit sizes to obtain the desired final finish, grinding can also involve more than one abrasion stage.The final grit size used in both grinding and polishing does not fully define the finish and must not be used in an attempt to specify a ground or polished finish on stainless steel. Other parameters such as abrasive pressure, contact time, material feed rate and whether the operations are done dry or wet all affect the character of the finish produced.Mechanical finishes merely described as 'satin', 'polished', 'dull', 'bright' or 'mirror' can vary quite significantly between mechanical finishing contractors.The correct choice of steel grade is also important when considering bright polished finishes.Grades such as 1.4541 and 1.4571, which contain small amounts of titanium to improve their "intercystalline" corrosion resistance, cannot be expected to be capable of completely defect-free mirror polished finishes. "Flaky" surface defects are likely to be left after polishing as the hard titanium carbide particles are dislodged from the softer surrounding steel surface. When 2P finishes are required the alternative 1.4307 or 1.4306 and 1.4404 or 1.4432 should be selected



http://www.euro-inox.org/pdf/map/MechanicalFinishing_EN.pdf

http://www.euro-inox.org/pdf/map/MechanicalFinishing_EN.pdf

Brushing

Although brushing normally involves the use of a fine abrasive action on the surface of the metal, in contrast to grinding and polishing there is no deliberate attempt to remove a surface layer. Rather it is modified by the action of bristles or a nylon fabric medium (Scotch-Brite) that may have some fine abrasive or lubricant included. Although it can be a single stage process, following a suitable polishing preparation stage, brushing can be done in several stages to obtain a particular finish. Brushed finishes have the same special finish code, 2J in BSEN 10088-2 as dull polished.

Buffing

In buffing no attempt is made to remove metal from the surface. Buffing is only intended to smooth and brighten the existing surface. Traditionally buffing uses cotton or felt based media, often with the addition of lubricants applied to the buffing wheel.Whenever buffing is being considered as the final finishing operation, it is important that the pretreated (or existing) surface is defined and controlled. Buffing cannot be used as a substitute for polishing to obtain finishes such as 1P/2P on 'intermediate' abraded ground or polished surfaces. It will only smooth down the surface and will not impart the same characteristics as if the surface has been abraded with successively finer grit sizes (ie as in polishing). Buffing cannot be used as shortcut to obtaining a polished finish. If the surface that is to be finished by buffing is too coarse, there is risk that traces of the underlying surface finish will be visible on the finally buffed surface.

Specifying mechanically finished stainless steel surfaces

An excellent source of information for specifying mechanically finished stainless steel surfaces is the BSSA 'Stainless Steel Surface Finishes' manual. This has an extensive range of surface finish swatch samples, literature and contact details of finishing companies.Ground and polished (satin) finishesMechanically ground and polished finishes for stainless steel flat products are specified in BSEN 10088-2 in Table 6 as 'special finishes'. Typical Ra surface roughness measurements in micro-metres are based on manufacturers or surface finishing contractors' data. Normally only one surface is required to meet the agreed standard of finish. Stainless steel long products to BSEN 10088-3 only have two special finishes defined G, centreless ground and P, polished.

Abbreviation Finishing Process Route

Notes Typical (Ra) micro-metres

1G or 2G Ground Can be based on either 1or 2 ex-mill finishes. A unidirectional texture, not very reflective. Grade of grit surface roughness can be specified.

-

1J or2J Brushed or dull polished

Can be based on either 1 or 2 ex-mill finishes. Smoother than G with a unidirectional texture, not very reflective. Grade of brush or polishing belt or surface roughness can be specified.

0.5-1.5

1K or 2K Satin polished

Can be based on either 1 or 2 ex-mill finishes. Smoothest of the special non-reflective finishes supporting the appropriate steel types' corrosion resistance for most external applications and marine environments. Transverse Ra should be below 0.5 micro m. with clean cut surfaces.

less than 0.5

1P or 2P Bright Can be based on either 1 or 2 ex-mill finishes. Mechanically polished less than

polished non-directional reflective finish with a high degree of image clarity (includes mirror finishes).

0.1

Buffed finishesThere is currently no provision for specifying buffed finishes on stainless steel flat products in BSEN 10088-2. BS 1449-2 (1983), which was replaced by BSEN 10088-2, was the previous standard for stainless steel flat products and did define two buffed finishes, 3B, dull buffed and 7, bright buffed. The American standard that defines stainless steel flat product finishes, ASTM A480 also includes a No 7 bright buffed finish. A comparison of buffed, ground and polished finishes is included in the table below. Note there is no No5 finish in ASTM A480.

BSEN 10088-2 Description BS1449-2 ASTM (A480)

2G Cold rolled, ground 3A No3

- Dull buffed 3B -

2J Cold rolled, brushed or dull polished 4 No4

2K Cold rolled, satin polished 5 No6

- Bright buffed 7 No7

2P Cold rolled, bright polished 8 No8

BS 1449-2 described taking mill finishes 2B or 2A (bright annealed) and creating the number 7 finish by fibre or cloth mop buffing with the addition of a suitable buffing compound. The 3B finish was less of a buff, rather a single pass grind/polish using a 220 grit abrasive, but was classed as a 'buff' finish.There were no intermediate successive grind/polish stages were required when producing a BS 1449-2 3B finish.

Applications for mechanically finished stainless steel

Mechanically finished stainless steel is widely used, including both building internal and external applications.The surface appearance, corrosion resistance and dirt retention of mechanically finished stainless steel surfaces can vary widely, depending, in part, upon the nature of the abrasive medium used and the polishing practice. The1K/2K finish gives a fine, clean cut with minimal microcrevices. This helps optimize the corrosion resistance and minimising dirt retention of the surface. These finishes are more suitable for external applications than the 1J/2J finishes, especially where service environments are aggressive. The coarser 1J/2J and 1G/2G finishes, where required for their aesthetic appearance are more suitable for indoor applications.Brushed striated finishes are susceptible to damage, but scratches can be readily abraded out. These surfaces do not fingerprint easily and therefore can be used successfully in areas of high contact such as doors or windows. Atmospheric deposits and other forms of surface soiling are generally washed away most easily if any uni-directional polishing or grinding marks are oriented vertically, in the direction of water run off. Polished reflective surfaces are also susceptible to damage. Remedial polishing is possible but it is more difficult to get satisfactory results than on non-reflective finished surfaces.

Risk of contamination staining or rusting in service

Mechanically produced finishes on stainless steel products, produced by the manufacturing mills, specialist stockholder / service centres and specialist surface finishers are normally free from any contamination that could result in rust staining in service. These specialists often supply polished and brushed products with protective plastic coatings, which can help reduce the risk of damage or iron contamination

during downstream storage, fabrication, finishing and installation operations, if left on the steel surfaces.Contamination rust staining is very often caused when contaminated finishing media have been used. This is a particular risk in multi-metal fabrication shops unless special precautions are not taken to avoid the spread of contamination.When choosing finishing contractors it is worth bearing these points in mind. The Buyers Guide section of the BSSA web site and the 'Stainless Steel Surface Finishes' manual can be used for selecting specialist stainless steel mechanical finishers.

1.4828Material No. 1.4828

EN symbol (short) X15CrNiSi20-12

AISI/SAE 309

UNS S 30900

AFNOR —

BS —

alloy —

Registered work's label —

Standards —

Description

Material 1.4828 is a heat-resistant steel.

Chemical composition ¹ C≤ %

Si%

Mn≤ %

P≤ %

S≤ %

Cr%

Mo

Ni%

V

0,20 1,50-2,50 2,0 0,045 0,015 19,0-21,0 11,0-13,0

Nb

Ti

Al

Co

Cu

N≤ %

Fe

0,11

¹ in accordance with Key to Steel 2001

Special characteristicsTemperature range Dicht kg/dm³ Hardness (HB)

heat-resistant in air up to 1000°C 7,9 ≤ 223

heat-resistant steel

Welding filler1.4829

Main fields of application (depending on the specific conditions of use)

building of industrial furnaces, apparatus engineering, hardening boxes, annealing pots, annealing boxes

(all aforementioned specifications serve as a general orientation and have to be reviewed depending on the specific conditions of use)

1.4841Material No. 1.4841

EN symbol (short) X15CrNiSi25-20

AISI/SAE 314 / 314L

UNS S 31400

AFNOR Z 15 CNS 25-20

BS —

alloy —

Registered work's label Cronifer®2520

Standards DIN EN 10095, SEW 470

Description

The heat-resistant steel 1.4841 is mainly used in industrial furnaces, waste incineration plants, thermal treatment plants, and in the petrochemical industry.Our product range in 1.4841 are tubes and pipes, fittings and flanges, accessories.

Chemical composition ¹ C≤ %

Si%

Mn≤ %

P≤ %

S≤ %

Cr%

Mo

Ni%

V

0,20 1,5-2,5 2,0 0,045 0,03 24,0-26,0 19,0-22,0

Nb

Ti

Al

Co

Cu

N

Fe

¹ in accordance with Key to Steel 2001

Special characteristicsTemperature range Density kg/dm³ Hardness (HB)

heat-resistant in air up to 1150°C 7,9 ≤ 223

heat-resistant steel

Welding filler1.4842

Main fields of application (depending on the specific conditions of use)

industrial furnaces, waste incineration plants, thermal treatment plants, petrochemical industry

(all aforementioned specifications serve as a general orientation and have to be reviewed depending on the specific conditions of use)

en standards (2)

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