tool & mold steel css tool...flat bar wire rod roll ut (ultrasonic testing) cold work tool steel...

TOOL & MOLD STEEL

04 Manufacturing Process

06 Cold Work Tool Steel_STD11/SKD11

08 Cold Work Tool Steel for High Tension Steel Plate Processing_TD1

10 Hot Work Tool Steel_STD61/SKD61

12 Hot Work Tool Steel for Die Casting_DC1

14 Plastic Mold Steel_TP1, TP4, TP4M

16 High Gloss Precision Plastic Mold Steel_SMAT 1

18 Precision Plastic Mold Steel with Excellent Machinability_SMAT E

22 Flame Hardened Tool Steel_PST23F85

24 Pre-hardened Tool Steel_SKT4(V)

26 Forged Rolls

28 Specifications

32 Classification of Tool Steel

33 Product Size

34 Packing Types

35 Tag & Label, Certificates of Approval, Order Requirements

Contents

Our constant mission is to open a door to the fu-ture of the global special steel industry.

From high-tech industries including power gen-eration, petrochemicals and semiconductors to futuristic industries such as nuclear power and aerospace, SeAH CSS is growing into a leader in Stainless steel, Tool steel, and Ni-alloys.

With our products, we aim to raise the level of customer satisfaction and set up the new indus-try standard by constantly challenging ourselves.

SeAH CSS’s constant mission: Creating new value from steel for the world

04/1966 Founded as Samyang Special Steel Co., Ltd.

12/1977 Completed a general special steel plant as

Korea Specialty Steel Co., Ltd

(for round bars, steel pipes and plates)

06/1982 Changed its name to SAMMI

General Special Steel Co., Ltd

04/1991 Opened its second special steel plant

(for steelmaking, rolling, processing)

02/1997 Annexed to POSCO Group

(for round bars and pipe business)

10/2006 Completed the 1st phase of its facility

rationalization

(AOD, HV Mill, Second acid cleaning plant and more)

02/2007 Renamed Changed its name to

POSCO Specialty Steel Co., Ltd

04/2012 Completed the 2nd phase of its facility

rationalization

(60ton EAF, Bloom Caster, SBM and more)

03/2015 Acquired by SeAH Group and changed

its name to SeAH Changwon Integrated

Special Steel Co., Ltd

History

Manufacturing ProcessTool & Mold Steel 05SeAH Changwon Integrated Special Steel

Ingot Casting ESR CCR9,000ton Press FurnaceFBMRFM

EAF

Heat Treatment

Centerless Grinding

Cold Drawing

Straightening

9,000ton Press

BMSBM

CCR

FBM

VIM ESR / VAR

EAF LF

Ingot

Bloom Caster

VD

Heating

Heating

Roughing Mill(H-V type)

Heating Precision Size Block(3Roll)

Intermediate Mill(3Roll)

2,200ton PressHeating RFM

MT

ECT, TOM, MLFT

Peeling

Round Bar

Flat Bar

Wire Rod

Roll

UT (Ultrasonic Testing)

Cold Work Tool Steel_STD11/SKD11[Equivalent to D2 (ASTM)& WNR1.2379 (DIN)]

Applied to tool materials manufactured in a cold state.

Applications

Product Characteristics

High Cleanliness Exceptional wear resistance

Uniform Microstructure Uniform hardness Extra hardness

H-Carbon and H-Chrome Steel provide extra hardness, excellent wear resistance and low dimensional change.

Chemical Composition

GradeChemical composition rate (Wt, %)

C Si Mn P S Cr Mo V

SKD111.401.60 0.40 0.60 0.03 0.03

11.013.0

0.801.20

0.200.50

Heat Treatment Conditions

Distribution of Heat Treatment Hardness

TTT Curve Dimensional Change after Heat Treatment

Microstructures

Spheroidizing Annealing Quenching &Tempering

Quenching hardness: HRC 61 ~ 65 /2nd hardening occurs in the range of 400~530°C.

Spherical cementites and eutectic carbides in ferrite matrix Tempered martensites and carbides

Oil Quenching

Tempering Temperature(°C)

Quenching and Tempering Heat Treatment Cycle

Holding Time

150~200°C500~530°C

980~1030°C Oil Cool

700~750°C

Pre HeatingAir Cool Air Cool

200°C50~80°C

Slow Heating

0.6hr/30mm 1hr/30mm 1hr/15mm 1hr/15mm

150~200°C500~530°C

Tempering(2 Times)Quenching

0 100 200 300 400 500 600

50

40

45

55

60

65

70

1050°C

975°C 1000°C

1025°C

Tem

pera

ture

(°C )

1 60second 60minute 60hour

800

700

600

500

400

300

200

100

A + F + C

A + F + C F + CAustenite

Ms10%30%70%

80%50%90%

A-AusteniteF-FerriteMs-Martensite Start TemperatureC- CarbideM-Martensite

25㎛

Stra

in Ra

tio(%

)


Quenching 1030°Cx40min Air Cooling A Specimen B Specimen

100 200 300 400 500 600-0.15

-0.10

-0.05

0

0.05

1.10

0.15

0.20

40

As Quenching

ThicknessThickness

Length

Width

Width

Length

Press moldPress moldPress mold

07SeAH Changwon Integrated Special Steel

Time

Tem

pera

ture

(°C )

10㎛

Shear Knives

Tool & Mold Steel

Har

dnes

s(H

RC)

Applicable molds SKD11 durability enhancement rate Work material

Center Pillar Outer 135% DP980 1.6t

Steel Wheel 165%HR580/330Y-DP

Door Hinge 110% HR340LA, 4.0t

Wear Resistance Galling Resistance

Wea

r Val

ue

Sliding Distance(mm)0 500250 750 1000 1250 1500 1750 2000 2250

0.0

0.2

0.4

0.6

0.8

1.0

Enhances its wear resistance performance by adding special alloy. Enhances its durability by restraining scratch on mold surface and galling.

0.0

0.3

0.6

0.9

1.2

SKD11 TD1

SKD11(1238mm) TD1(1424mm)

Hardness Curves Impact Toughness

Har

dnes

s(H

RC)

10R -C notch Impact Value(J)0 5 10 15 20 25

Enhances its hardness with below 600°C tempering condition. - Enhances its impact toughness by reducing carbide extrusion.

0 200 400 60050

55

70

65

60


1030°C Quenching / Air Cooling

SKD11 TD1

180°C Tempered Material

520°C Tempered Material

SKD11 TD1

Cold Work Tool Steel for High Tension Steel Plate Processing_TD1Special elements are added for high tension steel plate processing. It provides extra hardness and wear resistance through Q/T heat treatment.

Fatigue Strength Applications

Stre

ss am

plitu

de (M

Pa)

Number of Cycle to Failure

104 105 106 107 108400

600

800

1000

1200

SKD11TD1

Keeps the product durable by enhancing its fatigue strength. A test result provided by one of vehicle component manufacturers.


GradeChemical composition (Wt, %)

C Si Mn P S Cr Mo V Others

SKD111.401.60 0.40 0.60 0.03 0.03

11.013.0

0.801.20

0.200.50

-

TD1(aim) 1.0 1.0 0.6 8.0 1.3 0.2 Add.


Physical Properties

Thermal expansion co-efficient(X 10-6/℃) Specific gravity (g/cm3) Heat conductivity (W/m·K) Elastic co-efficient

11.6(27~100℃)12.7(100~200℃)

7.65 26.7 220

Molds for manufacturing materials in cold state (Drawing / trimming mold for high tension steel plate).

Applications

Drawing mold Trimming mold

QT heat treatment cycle CCT Curve

Tem

pera

ture

(°C)

Tem

pera

ture

(°C)

Time(sec)Holding Time

The same heat treatment applied to SKD11 available.

150~200°C500~550°C

150~200°C500~550°C

1000~1050°CTempering(2 Times)

700~750°C

Pre Heating

Air CoolingAir CoolingSlow Heating

Air or OilCooling

1:302:004:005:00

15 min25 min55 min75 min

10 min30 min40 min

10 min25 min50 min75 min

1:302:004:005:00

Quenching

101 100 1000 100000

200

400

600

800

1000

Martensite

Bainite

-10°C/s-5°C/s

-2°C/s

-1°C/s

-0.5°C/s

-0.1°C/s-0.2°C/s

-0.3°C/s

-0.4°C/s

Tool & Mold Steel

Fric

tion

Coef

ficie

nt(ц

)

Hot Work Tool Steel_ STD61/SKD61[Equivalent to H13 (ASTM), WNR1.2344 (DIN)]


Exceptional toughness and

red hardness

Heat crack and wear resistance

Anti-heat treatment transformation

Suitable for hot die casting molds with its high Vanadium content

Suitable for Aluminum and Magnesium

Pressing Dies

Tools with extra red hardness and heat crack resistance, used for die casting and extrusion molds.



C Si Mn P S Cr Mo V

SKD610.350.42

0.801.20

0.250.50 0.03 0.02

4.805.50

1.001.50

0.801.15

Molds for manufacturing materials in a hot state.

Applications

Die-casting moldExtrusion moldExtrusion mold

TTT Curve High Temperature Material Properties


Distribution of Heat Treatment HardnessA tempering temperature is set higher (+25 to 50°C) than the operative temperature.

When the temperature of a solid solution rises, its hardness increases as well. The 2ndhardening occurs in the range from 400 to 530°C


Har

dnes

s(H

RC)

30

40

50

60

0 100 200 300 400 500 600 700

Oil Quenching

1100°C

1000°C

1050°C

950°C

Y.S, T

.S(k

g ·f/m

m2 )

R.T 100 200 300 400 500 600 700

Temperature(°C)Time

40

80

120

160

R.A.

E.L.

Y.S.

T.S.

Tem

pera

ture

(℃)

경도

(H,C

)

1 60s 60m 60h

800

700

600

500

400

300

200

100

A + F + C

A + F + CA + C F + C

Ms20%40%

80%90%

10%

A-AusteniteF-FerriteMs-Martensite Start TemperatureC-CarbideM-Martensite

Physical Properties

Thermal expansion co-efficient (X 10-6/℃) Specific gravity (g/cm3) Heat conductivity (W/m·K) Young’s modulus (GPa)

12.5(25~200℃) 7.8 24(20℃) 205

Microstructures

Spherical cementites in ferrite matrix Tempered martensites

Spheroidizing Annealing Quenching &Tempering

Quenching and Tempering Heat Treatment Cycle


Holding Time

540~630°C 540~630°C

300°C


Tempering(2 Times)

700~750°C

Pre Heating

Air CoolRoom Temp

Air Cool100~150°CSlow Heating

0.6hr/30mm 1hr/30mm 1hr/15mm 1hr/15mm

Quenching

Tem

pera

ture

(℃)

10㎛ 25㎛

Tool & Mold Steel

300°C


C Si Mn P S Cr Mo V Others

SKD610.350.42

0.801.20

0.250.50 0.03 0.02

4.805.50

1.001.50

0.801.15

-

DC1(aim) 0.4 0.6 0.6 5.0 1.3 0.7 Add.

Temperature Thermal expansion co-efficient (X 10-6/℃) Heat conductivity (W/m·K)

25℃ 11.5 30.7

700℃ 14.1 29.1

Hot Work Tool Steel for Die Casting_ DC1Durable tool steels with added special elements help enhance productivity. They can be applied to large molds as well.


Hot tool steels for large scale die casting with extra toughness.

Applications


The same heat treatment applied to SKD61 available. Quenching Temperature : 1030°C

Physical Properties

Time (Hr)

Crac

k Len

gth

(㎛)

Crac

k Len

gth

(㎛)

Abso

rbed

Ener

gy (J

/㎠)

1:302:004:005:00

1:302:004:005:00

1:302:004:005:00

1:302:004:005:00

1:302:004:005:00

Air or OilCooling

Air or OilCooling

Holding Time

Tem

pera

ture

(°C)

0

500

1,500

2,000

10

Max Average

20 30 40 50

DC1SKD61

0

300

600

900

50

0

100

150

1200

Temperature(°C)

UTS

(MPa

)W

eigh

t los

s ra

tio (%

)

0

500

1,000

1,500

2,000

800600400200

0.5

DC1SKD61

0

10

5

20

25

15

30

Pre Heating

Air or OilCooling 150~200°C

500~550°C150~200°C500~550°C

Tempering(2 Times)

CCT Curve

Impact ToughnessHardness Curve(HRC)


1030℃ Quenching Condition

Har

dnes

s(H

RC)

2000 600400

65

60

55

50

45

40

35

30


Abso

rbed

Ener

gy(J/

㎠)

Har

dnes

s(H

RC)

Absorbed EnergyHardness

540 640590

120

100

80

60

40

20

0

60

50

40

65

DC1SKD61DC1SKD61

Tem

pera

ture

(°C)

Time(sec)10.1 10010 1000 10000 100000

0

100

300

200

400

500

700

600

800

900

1000

10100(°C/sec)

Pearlite

Bainite

1

0.1

0.05 0.01

Timing chain cover mold


Mechanical Properties

- Extra hardness guaranteed during heat treatment.- Excellent balance between hardness and impact toughness

High Temperature Strength- Enhances RA(Reduction of Area) rate.

Temper Softening Resistance (Exposed to a temperature of 650℃)- Enhances impact toughness and temper softening resistance through grain refinement at 650℃(die casting AI molten metal requirement).

Heat Crack PropertiesErosion Properties- Enhances anti-erosion Properties by optimizing alloying elements with Al molten metal.

- Reduces cracks through thermal stress.

Ms

Mf

Heading/cooling temp: 70 ↔ 700℃(25sec/1cycle)

Tool & Mold Steel

Quenching


Slow Heating

700~750°C

Al melting: ADC12 (700℃)Rotation speed: 0.33m/secDuration of evaluation : 30min

Temperature TP1 TP4 TP4M

20~100°C 7.4 11.2 11.8

20~200°C 10.9 11.8 12.3

20~300°C 12.1 12.4 12.9

20~400°C 13.0 13.0 13.4

20~500°C 13.7 13.6 14.0

20~600°C 14.3 13.8 14.2

SeAHCSS

JIS AISI DINChemical composition (Wt, %)

ApplicationsC Si Mn P S Ni Cr Mo

TP10.500.55 0.35 0.90 0.03 0.02

- - -Molds for general mer-chandise, base materials for precision parts

TP4 SCMimproved

4140improved

1.2311improved

0.260.43

0.150.35

0.801.15 0.025 0.020 0.45

0.901.50

0.200.30

Car bumper molds, radiator grills, OA equip-ment, cabinets, back covers of TVs and PCs, molds for consumer electronics and more

TP4M SNCMimproved

P20improved

1.2738improved

0.260.37

0.150.35

0.801.00 0.025 0.020 0.55

1.652.10

0.400.50

High end car bumper molds, radiator grills, OA equipment, cabinets, back covers of TVs and PCs, molds for consumer electronics and more

1.23110.350.45

0.200.40

1.301.60 0.035 0.035

-1.802.10

0.150.25

1.27380.350.45

0.200.40

1.301.60 0.035 0.035

0.901.20

1.802.10

0.150.25

1.23120.350.45

0.300.50

1.401.60 0.030

0.0500.100

-1.802.00

0.150.25

1.27140.500.60

0.100.40

0.650.95 0.030 0.030

1.501.80

1.001.20

0.450.55


Plastic Mold Steel_TP1, TP4, TP4MSteel materials used for molds that are utilized to inject molds.

Hardness Distribution

Thermal Expansion Co-efficient

Microstructures

TP1 [Nor.+Temp] TP4M [Nor.+Qu.+Double Temp.]TP4 [Nor.+Qu.+Double Temp.]

Pearlite+Ferrite Tempered Martensite Tempered Martensite

(Unit : 10-6/°C)

TP4

TP4M

350Min Max 200 100 0 100 200 350 mm36

38

40

42

44

HS(

HRC

)

38(25)42(30)

350Min Max 200 100 0 100 200 350 mm38

40

42

44

46

HS(

HRC

)

42(30)46(33)

HS(

HRC

)H

S(H

RC)

TP1

350Min Max 200 100 0 100 200 350 mm180

190

200

210

220

HB190

210△HB 15

Hardness Distribution (Deviation by Location)Guaranteed Specifications

△HS 2

△HS 2

CenterSurface Surface

Applications

Mold for car head lampsMold for car bumpers


HB

50㎛ 50㎛ 50㎛

Tool & Mold Steel




C Si Mn Cr Ni Ai V Others

P210.180.22

0.200.40

0.200.40

0.200.30

3.904.25

1.051.25

0.150.25

-

SMAT1(aim) 0.1 0.3 1.5 0.8 3.0 1.0 - Add.

High Gloss Precision Plastic Mold Steel _ SMAT1High gloss precision plastic mold material with high cleanliness and uniform structure.

TV PanelTV Panel


Impact toughness Machinability High cleanlinessPolishability

Applications

- High gloss molds for mobile phone cases, consumer electronics, OA machines, automobile parts (headlamps, fog lights).- High gloss TV front panels and high precision plastics.

Cutting Force Measurement ResultThrough put Based on Cutting Speed

Cutting Velocity(m/min)

Cutt

ing

Forc

e(N

)

80

60

100

120

140300

250

200

150

100

1000 50 100 150 200 250 300 150 200 250 300

Cutting Length(m)

Cutt

ing V

eloc

ity, V

c(m

/min

) SMAT1 Control

Weldability

Welded Area

200

250

300

350

400

450

500

550

600

Distance from Surface(mm)

Har

dnes

s(H

V)

10 20 30 40

545C530Cas-welded




Grade Yield strength[N/mm2]

Tensile strength[N/mm2]

Elongation[%]

Cross-section reduc-tion[%]

Hardness[HRc]

Impact toughness[J/cm2]

SMAT1 1,000~1,200 1,100~1,300 ›14 ›45 37~41 ›45

Machinability

- Excellent end-mill Machinability

Glossiness Measurement ResultSMAT1’s Polishability

800

900

1000

1100

1200

1300

1400

SMAT1 Comparable material 1

Polishability

- No pit or wave mark formed after lapping (#1200).

- No weld line formed after lapping due to its outstanding recovering ability.

Tool & Mold Steel

SMAT1 Control

Gradeø 30 ø 18 ø 10 ø 5

RPM FeedRate Hole RPM Feed

Rate Hole RPM FeedRate Hole RPM Feed

Rate Hole

SMAT E 389 30 9 800 40 6 1,400 50 6EA 3,000 24 27

Control 389 30 0 800 40 1 1,400 50 1EA 3,000 12 1

Precision Plastic Mold Steel with Excellent Machinability_ SMAT EHigh gloss precision plastic mold materials that have excellent workability and polishability through special refining and heat treatment technics.


C Si Mn Cr Mo Others

P200.280.40

0.200.80

0.601.00

1.402.00

0.300.55

-

SMAT E 0.25 0.25 1.5 1.4 0.6 Add.



Polishability Impact toughness High cleanlinessExcellent Machinability


Grade Yield strength[N/mm2]

Tensile strength[N/mm2]

Elongation[%]

Cross-section reduc-tion[%]

Hardness[HRc]

Impact toughness[J/cm2]

SMAT E 1,000~1,200 1,100~1,300 ›14 ›45 37~41 ›45

Cutting Volume(cm2)

Wea

r(mm

)

2000 800 1000 12 00400 600

0.50

0.45

0.40

0.35

0.30

0.25

0.20

0.15

0.10

0.05

0.00

16øWC16øHSS5øWC5øHSSSMAT E

Cutting Volume(cm2)

Wea

r(mm

)

2000 800 1000 12 00400 600

0.50

0.45

0.40

0.35

0.30

0.25

0.20

0.15

0.10

0.05

0.00

Control

(0.173)

(0.357)


Applications

Molds for high polishability/gloss injection(i.e. TV panels), molds for precision injection requiring complicated shaping process,and rubber molds requiring numerous machine processing operations(electric electronic parts).

TV partsTV parts

Machinability

End Mill- Excellent in End-mill Machinability

200

400

600

800

1000

5000 1000 1500 2000

Distance(㎛)

Har

dnes

s(H

v)

200

400

600

800

1000

5000 1000 1500 2000

Distance(㎛)

Har

dnes

s(H

v)

520C, 10Hr520C, 5HrControl520C, 10Hr

520C, 5HrSMAT E

Nitriding PropertiesAs shown in the figure, ‘520°C, 5Hr’ values prove that they have an outstanding nitriding quality. Their nitriding depth is about 0.2μm and initial hardness is about 880Hv.

(0.105)

16øWC16øHSS5øWC5øHSS

ControlSMAT E

HSS ø 3 HSS ø 5 HSS ø 7 HSS ø 10 WCø 1 WCø 3 WCø 5 WCø 7 WCø 10

100

200

300

400

500

600 580

12 3 1647

75

18

174

116

510492

510

385

283

133150

90 81

Gun Drill Drilling-Excellent in gun-drill machinability.

After measuring processed holes based on the tool’s quality and size, SMATE stays at about the same or the higher level than the control material shown in the figure.

(Unit:m/min, ea)

Tool & Mold Steel

Precision Plastic Mold Steel with Excellent Machinability_ SMAT E

Applications

Application area Measurement items

Lens core mold- Injection mold (double refraction analysis and measurement)- Core damage measurement after giving shots for 2,000 times

0200 400 600 800 1000 1200 1400 1600 1800 2000

100

200

300

400

500

600

Phas

e diff

100n

m or

hig

her, m

m2

No of shots

Control Material

200th

80.39mm2

700th

68.98mm2

1,200th

57.63mm2

1,600th

361.19mm2

2,000th

433.72mm2

SMAT E

200th

30.96mm2

700th

54.72mm2

1,200th

49.86mm2

1,600th

52.49mm2

2,000th

55.86mm2

* Measurement Range:More than 110 nm. A range from red to yellow.

ControlSMATE


SMAT E’s Upper Core SMAT E’s Bottom Core

ClearClear

Control Material’s Upper Core Control Material’s Bottom Core

DamagedClear

Mold Damage Observation

- SMAT E’s surface still shows satisfactory condition after giving shots for 2,000 times.

Measurement of Double Refraction after Injection

- SMATE’s double refraction rate is more constant and shows less deviation than the control material.

Tool & Mold Steel

❶

❷

❶ ❷ ❸ ❹

❸

❹

❶

❷

❸

❹

❶ ❷ ❸ ❹

Flame Hardened Tool Steel_ PST23F85


Cost can be saved throughflame surface heat treatment High strength and wear resistance at the surface

GradeChemical Composition (Wt, %)

C Si Mn Cr Mo

PST23F850.800.90

0.801.20

0.701.10

1.802.20

0.200.30


By utilizing flame, the flame hardened tool steel is produced through surface hardening heat treatment. This tool steel’s hardenability can be increased by adding Cr and Mn.The addition of Si also leads to enhance its hardenability. Furthermore, the portion of the C is a factor to control its hardness.

Molds for automobile parts, blanking dies, forming dies, trimming dies, and shear blades

Applications

Spheroidizing Annealing Microstructures

Hardness and Retained Austenite Distribution Based on the Flame Temperature

Quenching and Tempering Heat Treatment Properties

Grain Size Based on Flame Temperature Hardening Depth

Mold for car part Product

1hr/30mm

780°C

235 HB

Furnace

LateralSpherical cementites in ferrite matrix

HRC distribution ranges from 62 to 65 in the temperature of 900~950°C. Hardness lowered between 1,000~1,100°C due to increasing retained Austenite content.

Flame hardening depth: 5~6mm, HRC min: 58

0 800 900 1000 1100

60

65

70

Har

dnes

s(H

RC)

0 850 950 1050 1150

10

25

30

Reta

ined

Aus

teni

te(%

)

Austenitizing Temperature(℃)Austenitizing Temperature(℃)

Austenitizing Temperature(℃) Depth(mm)

0 800 900 1000 1100 1200

Gra

in Si

ze(A

STM

No.

)

6

7

8

9

10

11

12

2 4 6 8 10 12 14

Har

dnes

s(H

RC)

25

15

35

45

55

65

Flame depth 930°CHardening Layer

Har

dnes

s(H

RC)

0 800 900 1000 1100 1200

55

60

65

70

Austenitizing Temperature(℃)Holding Time

Har

dnes

s(H

RC)

100 200 300 400 500

70

65

60

55

50

0

Tempering Temperature(℃)

*925°C x 30min quenching (air cooled)+ temperingone hour


20㎛

Tem

pera

ture

Tool & Mold Steel


C Si Mn Ni Cr Mo V

SKT40.500.60

0.100.40

0.600.90

1.501.80

0.801.20

0.350.55

0.050.15

SKT4V* 0.55 0.35 0.80 1.50 1.10 0.33 0.18


Excellent Machinability Outstanding thermal resistance

Impressive wear resistance Uniform hardness

Pre-hardened Tool Steel_ SKT4(V)Provided as in the condition of Q/T heat treated. Mold machining customer can use material as mold without additional heat treatment.


Heat Treatment Conditions for Quenching &Tempering

Tensile Strength Based on Tempering temperatures Determining Hardness at High Temperatures

Hardness Distribution(*) Upgraded version of SKT4:Higher resistance to abrasion and heat

Tools for shaping materials in a hot state.

Applications

* Dies for form forging* Extrusion dies* Press molds* Die casting dies

1hr/30mm 1hr/15mm

820°C~880°C

530°C~630°C

Oil Air

Tens

ile St

reng

th(k

gf/m

m2 )

100°C 200°C 300°C 400°C 500°C 600°C0

20

40

60

80

100

120

140

160SKT4 SKT4V SKT4 SKT4V

Har

dnes

s(H

RC)

100°C 200°C20°C 300°C 400°C 500°C 600°C0

10

20

30

40

50

60

70

SKT4

350Min Max 200 100 0 100 200 350 mm36

40

42

44

46

HRC

4042

△HRC 2

Har

dnes

s(H

RC)

Har

dnes

s(H

RC)SKT4V

350Min Max 200 100 0 100 200 350 mm36

40

42

44

46

HRC

4244

△HRC 2

TTT Curve Dimension Change

Tepe

ratu

re(°C

)

Tem

pera

ture

Leng

th C

hang

e(m

m/m

m or

in./i

n.)

Time 60S 60min 60Hour

705

595

480

370

260

150

40

4236

4852

55

19 HRC

25

Martensite Transfromation Start

Austenite

95%

Tempering Temperature(℃)Holding Time

Tempering Temperature(℃) Tempering Temperature(℃)

Tempering Temperature, °FAustenitizing Temp. 845℃

As Quenchingt 95 205 315 4250

0.0004

0.0008

0.0012

0.0016As Quenching 200 400 600 800


Hot Pressing DiesHot Pressing Dies

Tool & Mold Steel

Austenitizing Temp., 845°C50%


C Si Mn Ni Cr Mo V

PSTR-12 1.50 0.50 0.50 0.20 12.0 1.00 0.80

PSTR-2 0.50 1.10 0.40 0.20 5.00 1.30 0.60

PSTR3505C 0.90 0.65 0.35 - 3.20 0.20 -

PSTR-5 0.90 0.30 0.45 Add 5.00 0.45 Add


Forged RollsWork rolls used for cold rolling mills that press steel plates applied to automobiles and electronic products.

•PSTR-12(SKD11 Modify) : Z/Mill Work Roll•PSTR-2(SKD62 Modify) : Z/Mill 1st / 2nd Roll

•PSTR3505C : 3% Cr Steel(General)•PSTR-5 : 5% Cr Steel(Electrical Plate Mill WR, Cold Rolled Mill WR/IMR)

*WR : Work Roll, IMR : Intermediate Roll

Applications

Applications

Work Roll

Depth Hardness Distribution

Diameter(mm)

Har

dnes

s(H

S)

70

75

80

85

90

95

100

0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75

HSD 91

Up to 65mm of the outer diameter guaranteed

* Hardness of work rolls for cold rolling steel plates applied to automobiles: HSD 96±1(HSD 91Up)

POSCO

Pohang

No.1 CR Shop 5% Cr Steel (ESR) W/R


Electrical Plate Shop 5% Cr Steel (ESR) W/R, Z/Mil

STS CR Shop Z/Mill

Gwangyang





India CR Shop 5% Cr Steel (ESR) W/R

DHF Japan CR Shop 3% Cr Intermediate Roll

HYUNDAI HYSCO CR Shop 5% Cr Steel (ESR) W/R

BNG STEEL STS CR Shop Z/Mill

SeAH STEEL CR Shop 3% Cr Intermediate Roll

27SeAH Changwon Integrated Special SteelTool & Mold Steel

Specifiactions

Type Standard GradeChemical composition (Wt, %) Annealing

temp.(°C)Annealing hardness

Heat treatment temp. (°C)Hardness Applications

C Si Mn P S Ni Cr Mo V Others Quenching Tempering

KS STC3(STC105) 1.001.10

0.100.35

0.100.50 0.03 0.03

750~780 Furnace cooling HB 212 Max 780

Water Cooling180

Air cooling HRC Min 61

Press frames, clamping tools chisels, drills, hammersJIS SK3(SK105) 1.00

1.100.100.35

0.100.50 0.03 0.03


Water Cooling180


ASTM W1 0.951.05

0.100.40

0.100.40 0.03 0.03 0.20 0.15 0.10 0.10

Cu : Max 0.20W : Max 0.15

730~760 Furnace cooling HB 202 Max 760~820

Water Cooling150~200


KS STD11 1.401.60 0.40 0.60 0.03 0.03 0.50

11.0013.00

0.801.20

0.200.50


Air cooling180


Cold dies, presses, tools, press dies

JIS SKD11 1.401.60 0.40 0.60 0.03 0.03

11.0013.00

0.801.20

0.200.50


Air cooling180


ASTM

D2 1.401.60

0.100.60

0.100.60 0.03 0.03 0.40

11.0013.00

0.701.20

0.501.10


Air cooling204


D3 2.002.35

0.100.60

0.100.60 0.03 0.03 0.50

11.0013.50 1.00 W : Max1.0


Oil cooling204


D4 2.052.40

0.100.60 0.60 0.03 0.03

11.0013.00

0.701.20

0.151.00


Air cooling204


DINWNR1. 2379 1.50

1.600.100.40

0.150.45 0.03 0.03

11.0012.00

0.600.80

0.901.10


Air cooling204


WNR1. 2080 1.902.20

0.100.40

0.150.45 0.03 0.03

11.0012.00


Air cooling204


SeAH CSS TD1 Patent 180~520 Air cooling HB 255 Max 1030

Air cooling180/520


KS

STF4 0.500.60

0.100.40

0.600.90 0.03 0.02

1.501.80

0.801.20

0.350.55

0.050.15


Oil cooling500


Extrusion dies,

Die casting dies, forging dies, head dies, shearing knives

STD61 0.350.42

0.801.20

0.250.50 0.03 0.02 0.25

4.805.50

1.001.50

0.801.15


Air cooling550

Air cooling HRC Max 50

STD62 0.320.40

0.801.20

0.200.50 0.03 0.02

4.755.50

1.001.60

0.200.50 W : 1.0~1.6 820~870

Furnace cooling HB 229 Max 1020 Air cooling

550 Air cooling HRC Max 48

STD6 0.320.42

0.801.20

0.200.50 0.03 0.02

4.505.50

1.001.50

0.300.50


Air cooling550

Air cooling HRC Max 48

JIS

SKT4 0.500.60

0.100.40

0.600.90 0.03 0.02

1.501.80

0.801.20

0.350.55

0.050.15


Oil cooling500


SKD61 0.350.42

0.801.20

0.250.50 0.03 0.02

4.805.50

1.001.50

0.801.15 W : 1.0~1.5 820~870


550 Air cooling HRC Min 50

SKD62 0.320.40

0.801,00

0.200.50 0.03 0.03

4.755.50

1.001.50

0.200.60 W : 1.0~1.5 820~870



SKD6 0.330.43

0.801.25

0.200.60 0.03 0.03

4.755.50

1.101.60

0.300.60


Air cooling550


ASTM

H13 0.320.45

0.801.25

0.200.60 0.03 0.03

4.755.50

1.101.75

0.801.20


Air cooling552


H12 0.320.40

0.801.00

0.200.50 0.03 0.03

4.755.50

1.001.50 W : 1.0~1.5 820~870



H11 0.330.43

0.801.25

0.200.60 0.03 0.03

4.755.50

1.101.60

0.300.60


Air cooling552


DIN

WNR1. 2344 0.370.43

0.901.20

0.300.50 0.03 0.03

4.805.50

1.201.50

0.90 1.10


Oil cooling540~560


WNR1. 2343 0.360.42

0.901.20

0.300.50 0.03 0.03

48.05.50

1.101.40

0.250.50


Oil cooling540~560


WNR1.2767 0.400.50

0.100.40

0.150.45 0.03 0.03

3.804.30

1.201.50

0.150.35


Oil cooling170~190


SeAH CSS

SKT4V 0.500.60 0.35

0.701.00 0.025 0.02

1.302.00

1.001.40

0.250.50

0.100.30

Al : 0.02~0.03Nb : 0.03~0.04


Oil cooling550


PST27K57V 0.550.60

1.001.20 0.50 0.03 0.03

0.801.20

4.505.50

1.401.60

0.801.20 Cu : Max 0.25 860~870

Furnace cooling HB 241 Max 1010 Oil cooling


DC1 Patent 820~870 Furnace cooling HB 229 Max 1020

Air cooling550


SeAH CSS

TP1 0.500.55 0.35 0.90 0.03 0.02

Prehardened steel

540~590 Air cooling HB Max 215

Molds for general merchan-dise, base materials for preci-sion parts

TP4 0.260.43

0.150.35

0.801.15 0.025 0.02 0.45

0.901.50

0.200.30

0.020.04 special Alloy

added

850~890 Oil cooling

540~620 Air cooling HS Min 38 Molds for auto bumpers,

OA machines, TV & PC back coversTP4M 0.26

0.370.150.35

0.801.00 0.025 0.02

0.300.55

1.652.10

0.400.50

850~890 Oil cooling

540~620 Air cooling HS Min 40

SMAT1 Patent

SMAT E Patent


Carbon Tool steel

Cold work Tool

steel

Hot work Tool steel

Plastic Mold steel

Tool & Mold Steel

Specifiactions

Type Standard GradeChemical composition (Wt, %) Annealing

temp.(°C)Annealing hardness

Heat treatment temp. (°C)Hardness Applications

C Si Mn P S Ni Cr Mo V Others Quenching Tempering

DIN

WNR1.2311 0.350.45

0.200.40

1.301.60 0.04 0.04

1.802.10

0.150.25

850~890 Air cooling HB 230 Max 850~890

Oil cooling540~620

Air cooling HS Min 38

Molds for high end auto bum-pers and consumer electronics

WNR1.2312 0.350.45

0.300.50

1.401.60 0.03

0.050.10

1.802.00

0.150.25


Oil cooling540~620


WNR1.2714 0.500.60

0.100.40

0.650.90 0.03 0.03

1.501.80

1.001.20

0.450.55

0.070.12


Oil cooling540~620


WNR1.2738 0.350.45

0.200.40

1.301.60 0.04 0.04

0.901.20

1.802.10

0.150.25


Oil cooling540~620


ASTM

A2 0.951.05

0.100.50

0.401.00 0.03 0.03

4.755.50

0.901.40

0.150.50


Air cooling204


Forming dies, punchesA6 0.650.75

0.100.70

1.802.50 0.03 0.03

0.901.40

0.901.40

0.150.50


Air cooling204


A8 0.500.60

0.751.10

0.200.50 0.03 0.3

4.755.50

1.151.65 W : 1.0~1.5 770~790



DIN WNR1.2363 0.901.05

0.200.40

0.400.70 0.035 0.035

4.805.50

0.901.20

0.100.30


Air cooling180

Air cooling HRC Min 60 Forming dies, punches

KS

STS95 0.800.90 0.50

0.801.10 0.03 0.03

0.200.60


Oil cooling180

Air cooling HRC Min 59 Ring gauges, pulling dies

STS3 0.901.00 0.35

0.901.20 0.03 0.03

0.501.00 W : 0.5~1.0 750~800


180 Air cooling HRC Min 60 Screw cutters, cutting knives

STS93 1.001.10 0.50

0.801.10 0.03 0.03

0.200.60


Oil cooling180

Air cooling HRC Min 63 Blades, press frames

JIS

SKS95 0.800.90 0.50

0.801.10 0.03 0.03

0.200.60


Oil cooling180


SKS3 0.901.00 0.35

0.901.20 0.03 0.03

0.501.00 W : 0.5~1.0 750~800


180 Air cooling HRC Min 60 Screw cutters, cutting knives

SKS93 1.001.10 0.50

0.801.10 0.03 0.03

0.200.60


Oil cooling180

Air cooling HRC Min 63 Blades, press frames

ASTM

O1 0.851.00

0.100.50

1.001.40 0.03 0.03

0.400.70 0.30 W : 0.4~0.6 750~800


204 Air cooling HRC Min 59 Cold molding dies, forming rolls

O6 1.251.55

0.551.50

0.301.10 0.03 0.03 0.30

0.200.30


Oil cooling204


O2 0.850.95 0.50

1.401.80 0.03 0.03 0.50 0.30 0.30


Oil cooling204

Air cooling HRC Min 59 Cold molding dies, forming rolls

DINWNR1.2510 0.90

1.050.150.35

1.001.20 0.035 0.035

0.500.70

0.050.15 W : 0.5~0.7 770~790

Furnace cooling HB 229 Max 780~820 Oil cooling

180~220 Air cooling HRC Min 61

Cold molding dies, forming rollsWNR1.2842 0.85

0.950.100.40

1.902.10 0.03 0.03

0.200.50

0.050.15


Oil cooling150~250


KS STS41 0.350.45 0.35 0.50 0.03 0.03

1.001.50 W : 2.5~3.5 760~820


180 Air cooling HRC Min 53 Dies for hot forging

JIS SKS41 0.350.45 0.35 0.50 0.03 0.03

1.001.50 W : 2.5~3.5 760~820



ASTM

S1 0.400.55

0.151.20

0.100.40 0.03 0.03

1.001.80 0.50

0.150.30 W : 1.5~3.0 760~820



S5 0.500.65

1.752.25

0.601.00 0.03 0.03

0.100.50

0.201.35

0.150.35


Oil cooling204

Air cooling HRC Min 58Cutter blades, punches

S7 0.450.55

0.201.00

0.200.90 0.03 0.03

3.003.50

1.301.80 0.35


Air cooling204


SeAH CSS

PSTR-1 1.301.70 0.70 0.70 0.03 0.03 0.50

11.0013.00

0.701.30

0.501.00 Co : 0.2~0.5 860~880

Furnace cooling HB 225 Max

Heat treatment at low, medium or high frequency

* As per customer’s requirements

HS Min 90

Z-mills and cold rollers

PST23R11 1.401.55 0.40 0.60 0.03 0.03 0.50

11.0012.50

1.551.70

0.700.95 Co : 0.3~0.5 860~880

Furnace cooling HB 225 Max HS Min 90

PSTR-2 0.300.60 1.30 0.70 0.03 0.03 0.50

4.006.00

0.801.70 0.82 W : Max 1.5 860~880


PSTR-5 0.750.95

0.200.50

0.200.50 0.025 0.015 0.50

4.505.50

0.400.65 - - 860~880


PSTR-12 1.301.70 0.70 0.70 0.03 0.03 0.50

11.0013.00

0.701.30

0.501.00

Co : 0.2~0.5Cu : Max 0.30

860~880 Furnace cooling HB 245 Max HS Min 90

SeAH CSS PST23F85 0.800.90

0.801.20

0.701.10 0.025 0.025

1.802.20

0.200.30

0.050.10

810~830 Furnace cooling HB 235 Max 900~1000°C

Flame HRC Min 60 Cold moldsFlame hardened Tool steel


Oil hard-ened Tool

Steel

Shock resisting Tool steel

Forged Rolls

Plastic

Mold

Steel

Air

hardened

Tool Steel

Tool & Mold Steel

SK3

Wearresistance

SK1

Wear resistanceSKD1

Cold work tool steelSKD11

Wear resistanceHigh temp. hardeness

SKH3

High speed tool steelSKH55

SK2

Machinability SKS2 Cold work tool steel

MachinabilityHigh temp. hardeness

SKH2

High speed tool steelSKH51

Impact resistance SK5

Wear resistanceImpact resistance

SKS3

Cutting tool steel with Impact resistanceSKS31

Impact resistance SKS41

High temp. hardeness SKD4

Hot work tool steelImpact resistance SKD61

Product Size

Requirement Substantial Alloy Elements

High temperature strength W, Mo, Co (in combination with W or Mo), V, Cr, Mn

Wear resistance V, W, Mo, Cr, Mn

Hardenability Mn, Mo, Cr, Si, Ni, V

Transformation resistance Mo (in combination with Cr), Cr, Mn

Toughness (grain refinement) V, W, Mo, Mn, Cr (Al adjusted for others)

Resistance to oxidation for hot work tool steel Cr, Si, Al

200≤W≤300

300<W≤350

350<W≤405

405<W≤450

450<W≤505

505<W≤600

600<W≤650

650<W≤850

850<W≤950

950<W≤1000

1000<W≤1100

1100<W≤1250

150<T≤200

200<T≤250

250<T≤305

305<T≤350

350<T≤400

400<T≤500

500<T≤550

550<T≤600

600<T≤650

650<T≤700

Forged Flat Bars(Unit : mm)

150≤W≤170 170<W≤220 220<W≤250 250<W≤310 310<W≤410 410<W≤510 510<W≤610 610<W≤1010

10≤T≤13

13<T≤16

16<T≤22

22<T≤50

50<T≤65

65≤T<110

110<T≤120

120<T≤130

130<T≤150

Rolled Flat Bars(Unit : mm)

500≤W<600

600.1≤W<800

800≤W<1000

1000≤W<1100

1100≤W<1200

1200≤W<1300

1300≤W<1400

1400≤W<1600

1600≤W<1700

1700≤W≤1900

200≤T≤300

300<T≤500

500<T≤600

600<T≤800

800<T≤1000

1000<T<1100

1100<T≤1100

Plastic Mold Steel (Forged Flat Bars)(Unit : mm)

Contact us for any order outside the dimensions above. [T: Thickness, W: Width]

Round Bars• Rolled (5.7~340ø) • Forged (206~850ø)

Classification of Tool Steel33SeAH Changwon Integrated Special SteelTool & Mold Steel

Packing TypesFlat bars

Bare Hessian Wooden Slate

Bare Hessian Wooden Slate

Wooden Box

Round bars

Order RequirementsWe can only provide the right product for you when you fully specify what you need. Be sure to provide detailed information for the line items below.E-mail : [email protected] / Website : www.seahss.co.kr/eng / Tel : +82 2 6970 2369 for questions

1) Applicable standards: ASTM, JIS, DIN, etc. 2) Steel grade, Surface, Heat Treatment, Dimension

3) Quantity and Delivery 4) Applications, method of processing 5) Special requirements (if applicable)

Certificates of Approval

ISO/TS 16949:2009ISO QUALITY MANAGEMENT SYSTEM

KOSHA18001KOSHA SAFE AND HEALTH MANAGEMENT SYSTEM

ISO 9001:2008ISO QUAL-ITY MANAGE-MENT SYSTEM

ISO 14001:2004ENVIRON-MENTAL MANAGEMENT SYSTEM

KOREAELECTRICPOWERINDUSTRYCODE

JAPANESEINDUSTRIALSTANDARDS

KOREANINDUSTRIALSTANDARDS

Tag & Label

Tag (for Domestics) Tag (for Export) Label (for Domestics) Label (for Export)

35SeAH Changwon Integrated Special SteelTool & Mold Steel

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