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है”ह”ह

IS 2085 (1962): Code for designation of ferro alloys [MTD5: Ferro Alloys]

IS : 2085 - 1962

Indian Standard

CODE FOR

DESIGNATION OF FERRO-ALLOYS

Metal Standards Sectional Committee, SMDC 1

Chnirmm SHRI R. C. B~a~~w,weicm

Rcprrsrrtlin~ The Tata Engineering & Locomotive Co Ltd, Jamshcdpur

M:mbcrr DR N. A~~ANEVULU

Swu D. S. Muam (.4hwfc) SHRI B. N. D.&s Dmecro~ DP INIPECT~N (MET).

TATANAGAR SHRI D. P. JETHAWANI JOINT Dmecron, @SEARCH (M&C)

SHRI N. v. PANDlT (Allnnofr) SHRI V. J. Jcmr

MR. R. ~WFORD SHRI K. C. COWER (Alfmofc)

DR D. R. MALHOTRA SHRI D. R M,+LIK

SHRI R. N. DATTA (A~femak) Swtt J. MCCUTCHEON SHRI P. Mrrru SHRI S. N. MUKERJI SHRI B. K. Munmv

SHR~ K. SRINIVAS (Alrem&) DR S. R. PIUHANIK DR E. G. RAHACHANDRAN SHRI K. N. P. RAO SHR~ 6. RAY SHRI C. J. SHAH SHR~ K. H. SAARMA SHRI K. Snnav~s.u

SHRI M. R. JANARI~HANAN (ANrmolc) SHRI B. S. KRISHNAMACHAR,

Deputy Director (S &M)

Defence MetaBurgical Research Laboratory [Ministry of’Defcnce (R&D)1

National Metalhwgica~ Laboratory &SIR), Jan~hedpur Inspection Wing, Directorate Generat of Supplies & Dispcoals

(Ministry of Works, Housing & Supply) Central Water dr Power Commission (Water Wing), New Delhi Ministry of Railways

Assay Department & Silver Refinery Project (Ministry of Finance), Calcutta

Metal Containers Sectional Committee, CDC 28, ISI

The Institution ol Engineers (India), Calcutta Directorate General of Ordnance Factories (Mini&y oi

Defence), Calcutta

Indian Non-Ferrous Metals hlanu~acturers Association, Cnlcuttr Indian Tube Co (1953) Ltd Calcutta Government Test House, Ca cutta I Indian Aluminium Co Ltd, Calcutta

Ministry of Steei, Mines 8i Fuel The Indian Institute ol Metals, Calcutta The Tata Iron & Steel Co Ltd, Jamshedpur Hindustan Steel Ltd., Rourkcla Development Wing, hliniotry of Commerce & lt~dustry The Indian Iron 8 Steel Co Ltd. Bumpur Institute bl’ Indian Foundrymen, Calcutta

Director, IS1 (Ex-o&io Member)

SHRI T. S. SUDRAWANIAN Extra Assistant Director (SBi M), ISI

Panel for Classification of Metals, SMDC 1 : Pl

hfinistry of Railways

Mcmbrrr SHRI T. V. N. Ktoho Ashok Leyland Ltd, Madras

The Tata Iron 8x Steel Co Ltd, Jamshedpur

INDIAN STANDARDS INSTITUTION MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARC

NEW DELHI 110002

IS : 2085 - 1962

h&an Standard CODE FOR

DESIGNATION OF FERRO-ALLOYS

0. FOREWORD

0.1 This Indian Standard was adopted by the Indian Standards Institution on 30 June 1962, after the draft finalized by the Metal Standards Sectional Committee had been approved by the Structural and Metals Division Council.

0.2 For easy identification and ready reference offerro-alloys during shipment and to prevent mix-up at the stores and at the further processing centres, each container of ferro-alloy is to be properly marked or stamped with the designation of the alloy.

1. SCOPE 1.1 This standard specifies the symbols which shall be used for designating ferro-alloys on the basis of chemical composition. It is intended that only I he minimum number of symbols essential for identifying ferro-alloys shall be used.

2. GENERAL

2.1 Ferro-alloys may be designated by a group of symbols indicating the important chemical constituents in the following order:

a) Carbon content (see 3),

1,) Alloy content (see 4),.

c) Other major constituents (see S), and

d) Phosphorus content (see 6).

2.2 It is emphasized that for designating a particular grade of ferro-alloy, it may not be necessary to include the symbols for all the characteristics given in 2.1 and, as far as possible, for the sake of brevity, only those symbols, which are important and essential, should be used.

3. SYMBOL FOR CARBON CONTENT (CARBON INDEX)

3.1 It shall consist of the average carbon content in percentage without prefixing the chemical symbol ‘C’.

2

IS: 2085-1962

3.1.1 Where only a maximum limit is specified, the carbon index shall not ordinarily be used. If, however, to differentiate two alloys of the same family, it is found necessary to indicate the carbon percentage, the range of carbon content may be taken as ten points (0.10 percent) and the average carbon content shall be expressed in tenths of a percentage.

4. SYMBOL FOR ALLOY CONTENT (ALLOY INDEX)

4.1 In the case of iron base ferro-alloys the symbol ‘Fe’ shall be followed by the chemical symbol of the alloying element and the alloy content which shall be indicated by its average percentage content expressed as follows:

VALUES

Terminating in 0.5 and over

Terminating below 0.5

INDEX NUMBER

Kounded up to the nearest whole number

Rounded down to the nearest whole number

4.1.1 In case only the maximum or minimum limit of the alloy element is specified, the range may be assumed as 10 percent less than the maximum limit specified or 10 percent more than the minimum limit specified.

4.2 In the case of ferro-alloys, such as calcium silicon, silica manganese, etc, the chemical symbol of each significant alloying element shall be arranged in the descending order of percentage content. The average percentage content of each alloying element shall follow the respective chemical symbol and shall be indicated by an index number as given in 4.1 and’4.1.1. The symbol ‘Fe’ shall not be included in such cases.

4.2.1 The base alloy shall be designated by its chemical symbol only and the percentage content shall not be included.

4.3 Where two or .more significant alloying elements have the same alloy index in a ferro-alloy, the chemical symbols shall be grouped together followed by their alloy index.

5. SYMBOL FOR OTHER MAJOR CONSTITUENTS

5.1 Where necessary, the major constituents shall be designated by the chemical symbols followed by the average content expressed as follows:

VALUES

Terminating in O-5 and over

Terminating below 0.5

INDEX NUMBER

Kounded up to the nearest whole number

Rounded down to the nearest whole number

3

IS: 208!i-l!M2

5.1.1 In case only the maximum or minimum limit of the major constituent is specified, the range may be assumed as 10 percent less than the maximum limit specified or 10 percent more than the minimum limit specified.

6. SYMBOL FOR PHOSPHORUS CONTENT

6.1 Phosphorus content up to and including O-3 percent shall not be indicated.

6.2 Phosphorus content more than O-3 percent shall be indicated by the symbol ‘P’ followed by the average content in tenths of a percentage,

6.3 Where phosphorus appears as the major alloying element, for example, ferro phosphorus, it is to be coded as in 4.1.

7. EXAMPLES

7.1 In order to illustrate the method of designating ferro-alloys, examples designations, in accordance with this code, are given below: of code

a) Ferro Phosphorus (IS: 1471-1960’)

PERCENT DESIGNATION Carbon 1.0 Max

Phosphorus 20 to 26 FeP23

Ferro Molybdenum (IS : 1469-196(Y)

PERCENT DESIGNATION Carbon Molybdenum

O-50 Max 1 70.0 Min

Silicon l-5 Max 1 FeMo75 Sulphur O-06 Max ’ Phosphorus 0.10 Max J

Low Carbon Ferro Titanium (IS : 1468-1960 Specification for Ferro Titanium)

PERCENT DESIGNATION

b)

c)

d)

Carbon Titanium Aluminium

0.10 Max 1 40 Min 20 to 30 i

OlFeTi45A125

Silicon 2to3 i

Medium Carbon, High Silicon Ferro Titanium (IS : 1468-1960 Specification for Ferro Titanium)

PERCENT DESIGNATION Carbon 1-O Max -l Titanium Aluminium Silicon

25 Min I.0 Max 1 1 FeTi30Si23

20 to 25 J -

*Since revised. 4

IS: 2085.l!I62

e) High Carbon .Ferro Titanium (IS : 14681960*Specification for Fern, Titanium)

PERCENT DESIGNATION

Carbon 6 to 8 Titanium 30 to 40 Aluminium 1 to 2 Silicon

1 7FeTi35

2to3 J

f) Silica Manganese (IS : 1470- 1960+ )

PERCENT DESIGNATION

.; Manganese Silicon

65 to 75 1. 16 to 20

Carbon J

Phosphorus 2-O Max ) MnSi18 0.30 Max ’

Sulphur 0.03 Max I

g) Spiegeleisen (Commercial) (IS : 1 ill-1957* Specification for Spiegeleisen)

PERCENT DESIGNATION

Carbon 6.5 Max / Manganese 15 to 25 1 Silicon 1.5 Max “i Mn20P6 Sulphur 0.05 Max Phosphorus

i 0.60 Max J

-. NOTE-In order to avoid confusion between the letter ‘1’ and numeral ‘1’ the

chemical symboi ‘Al’ for aluminium in 7.1 face (Al).

(c) has been printed in a different type