SP : 14 - 1976

INDEX TO

STEEL DESIGNATIONS

( First Reprint JULY 1990 )

UDC 669.14:003.62:001.815

@ Copyright 1977

BUREAU OF INDIAN STANDARDS MANAK BHAVAN, 9 BAHADUIt SHAH

NEW DELHI 110002

Gt 3

ZAFAR MARG

November 1977

SP : 14 - 1976

INDEX TO STEEL DESIGNATIONS

Metal Standards Sectional Committee, SMDC 1

Chairman SHRI A. K. BHAT~ACHARYYA

Mtimbers

Representing Ministry of Railways

~s~&~!$$~fc~O~ ;“M”si ) ( Alternates to Shri A. K.‘Bhattacharyya )

SHRI M. ANJANEYULU Mining and Allied Machinery Corporation Ltd,

S,HRI-N. V. RAGHAVAN ( AIternate ) Durgapur

DR A. S. BHADURI SHRI N. K. BHARDWAJ

National Test House, Calcutta Instrumentation Limited, Kota

SHRI N. S. CHAUDHARY ( AIternate ) SHRI D. D. BHUPTANI Indian Tube Co Limited, Calcutta

SHRI 0. N. AGARWAL ( Alternate ) SHRI P. K. CHAKRAVARTY The Tata Iron & Steel Co Ltd, Jamshedpur

SHRI M. C. KUMARASWAMY ( Alternate ) SHR~ 6. CHATTERJEE

SHRI K. C. SOM ( Alternate ) Hindustan Steel Limited, Ranchi

SHRI P. K. CHATIERIEE Ministry of Defence ( DGI ) SHRI P. K, GANGOPADHYAY ( Alternate )

SHRI K. V. CHINNAPPA SHRI N. T. GEORGE

International Nickel ( India ) Pvt Ltd, Bombay Ministry of Defence ( R & D )

SHRI G. R. K. MURTY ( Alternate ) SHRI A. K. GUHA Directorate General of Supplies & Disposals

. SHRI P. C. MUSTAFI ( Alternate ) ( Inspection Wing ), New Delhi

DR S. S. KHANNA SHRI A. N. RAO ( Alternate )

Heavy Engineering Corporation Ltd, Ranchi

DR D. M. LAKHIANI SHR~ T. K. DUTTA ( Afternate )

Indian Iron & Steel Co Ltd, Burnpur

SHRI U. MOHAN RAO SHRI V. K. GUPTA ( Alternare )

Bharat Heavy Electricals Ltd, Bhopal

SHR~ B. K. MURTHY Indian Aluminium Co Ltd, Calcutta SHRI N. GOPALKRISHNAN ( Alternate )

DR S. R. PRAMANIK SHRI M. K. RAO

Ministry of Steel and Heavy Engineering The Binani Metal Works Ltd, Calcutta

SHRI A. K. CHAT~ERJEE ( Afternate ) SHRI S. ROY Indian Non-Ferrous Metals Manufacturers’ Asso-

ciation, Calcutta SHRI A. K. BASU ( Alternate )

( Continued on page 2 )

@I Copyright 1971 .BDRBAU OF INDIAN STANDARDS

This publication is protected under the Indian Copyright Acf ( XIV of 1957 ) and reproduction in whole or in part by any means except with written permission of the publisher shall be deemed to be an infringement of copyright under the said Act.

, _,_ ,.,. _“_,” ,,1. -“v~*-

1 :

SP : 14 - 1976

( Continued from page 1 )

Members Representing

REPRESENTATIVE National Mettillurgical Laboratory (CSIR ), Jamshedpur

SHRI D. SRINIVASAN Joint Plant Committee, Calcutta SHRI V. K. WAZIR Institute of Indian Foundrymen, Calcutta

HON SECRETARY ( Alternate ) SHRI C. R RAMA RAO, Director Gederal, IS1 (‘&-officio Member’)

Director ( Strut & Met )

Secrefary SHRI VIJAY KUMAR

Assistant Director ( Metals ), IS1

Subcommittee for Terminology, Classification and Designation of Steels, SMDC 1 : 1

Convener

SHRI K. V. CHINNAPPA International Nickel ( India ) Pvt Ltd, Bombay

Members SHRI R. M. BALANI Directorate General of Technical Development,

New Delhi SHRI B. C. BASAVRAJ Visvesvaraya Iron & Steel Ltd. Bhadrnvati

SHRI K. B. D. BEERIAH ( AIlernare ) SHRI S. K. BASU Guest, Keen, Williams Ltd, Howrah SHRI D. D. BHUPTANI Indian Tube Co Ltd, Calcutta SHRI P. K. CHAKRAVARTY The Tata Iron & Steel Co Ltd, Jamshedpur

SHRI M. C. KUMARASWAMY ( Alternate ) SHRI P. K. CHATTERJEE Ministry of Defence ( DC1 ) CHEMIST AND METALLURGIST Ministry of Railways SHRI M. K. DUTTA Hindustan Steel Limited, Durgapur SHRI R. DUTTA Indian Iron & Steel Co Ltd, Burnpur

SHRI T. K. DWTA ( Alternate ) SHRI A. K. GUHA Directorate General of Supplies and Disposals

( Inspection Wing ), New Delhi SHRI P. C. MUSTAFI ( Alternate )

SHRX M. K. PRAMANIK Iron & Steel Control, Calcutta DR V. RAMASWAMY Research & Development, Hindustan Steel Limited,

Ranchi SHRI S. R. MEDIRATTA ( Alternate )

SHRI D. SEN Ministry of Defence ( DGOF ) SHRI M. M. SHENOY Hindustan Steel Limited. Calcutta SHRI R. N. SINGH Mahindra Ugine Steel Co Ltd, Bombay UNDER SECRETARY Central Board of Excise and Customs ( Ministry of

Finance ), New Delhi

SP : 14 - 1976

INDEX TO

STEEL DESIGNATIONS

0. FOREWORD

0.1 This Index to steel designations has been brought out to facilitate the users and manufacturers in using the new system of steel designation given in IS: 1762 .(Part I)-1974*.

0.2 For the purpose, the steels have been grouped into the following six schedules as given in IS: 1570-19617.

Schedule I -

Schedule II -

Schedule III -

Steels specified by tensile properties but without detailed chemical composition

Carbon steels with specified chemical composition and related mechanical properties

Carbon and carbon manganese free cutting steels with specified chemical composition and related mechanical properties

Schedule IV - Alloy steels other than stainless and heat resisting steels with specified chemical composition and re- lated mechanical properties

Schedule V - High alloy steels, stainless and heat resisting steels:

Schedule VI - Carbon and alloy tool steels

0.2.1 A number of Indian Standards cover grades of steel which are not included in IS : 1570-19617. The corresponding new designations for these steels are listed in Appendix A. A list of referred standards is included in Appendix B.

1. SCOPE

1.1 This index gives the new steel designations in accordance with IS : 1762 (Part I)-1974* corresponding to the old designations given in IS: 1570-19617.

*Code for designation of steel: Part I Based on letter symbols ( first revision ).

tSchedules for wrought steels for general engineering purposes. Sprinted separately as IS:1570 (Part V)-1972.

3

SP : 14 - 1976

SCtlli:DULE I STEELS SPECIFIED BY TENSILE PROPERTIES BUT \VITHOUT DETAILED CHEMICAL COMPOSITION

NI:W OLD DFSIGNATIONS DESIGNATIONS

(1) (2)

Fe 290 St 30

Fe 310 St 32

Fe 330 St 34

Fe 360 st 37

Fe 380 St 39

Fe 410 St 42

Fe 430 St 44

Fe 460, St 47

Fe 490 St 50

Fe 510 St 52

Fe 540 St 55

Fe 570 St 58

Fe 620

Fe 650 St 66

Fe 770 i

St 78 .@ ‘.*’ .* * *

Fe 860 St 88

SP:14-1976

SCHEDULE II CARBON STEELS SCHEDULE III CARBON AND WITH SPECIFIED CHEMICAL CARBON - MANGANESE FREE COMPOSITION AND RELATED CUTTING STEELS WITH

MECHANICAL PROPERTIES SPECIFIED CHEMICAL

New DEWNATIONS

(1)

4C2

SC4

7c4

lOC4

14C6

lSC4

15cs

2Oc8

25C4

25C8

3OC8

3x4

35C8

4OC8 .

45C8

SW8

5OCl2

55C6

5X8

6OC6.

65C6

7OC6

75C6

SOC6

85C6

98C6

113C6

OLD DESICINATIONS

(2)

co4

co5

co7

Cl0

Cl4

Cl5

Cl5Mn72

c20

C25

C25Mn75_

c30

c35

C35Mns

c40

c45

a0

CSOMn 1

a5

C55Mnz

050

C65

00

c75

a0

a5

C98

Cl13

COMPOSITION AND RELATED MECHANICAL PROPERTIES

New OLD DBSIONATIONS DEWJNATIONS

(1) (2)

loC8SlO 1Oq

14c14S14 14MnlSl2

25Cl2Sl4 25MnlSlj

4OClOS18 4OS5

13ClOS25 13s25

4OC15Sl2 4OMn2Sg

SP:14-1976

SCHEDULE IV ALLOY STEELS ( OTHER THAN STAINLESS AND HEAT RESISTING STEELS ) WITH SPECIFIED

CHEMICAL COMPOSITION AND RELATED MECHANICAL PROPERTIES

NEW DESIGNATIOI‘IS

(1)

36Si7

55Si7

llC15

2oc15

27C15

37c15

47c15

35Mn6Mo3

35Mn6Mo4

lOMo6

20Mo6

32Mo6

15Cr3

16Mn5Cr4

20MnCr5

5SCf3

40Cr4

50Cr4

102Cr4

102Cr6

105Cr5

5OCr4V2

21Cr4Mo3

40Cr4Mo3

07Cr4Mo6

OLD DESIGNATIONS

(2)

37Si2Mn90 -

55Si2Mnz

llMn2

20Mn2

27Mn2

37Mn2

47Mn2

35MnZMo28 -

‘35Mq2Mog

10Mo55 -

20Mo55 -

33Mo55 -

15Cr65 -

17MnlCr95 -

2OMnCrl

55Cr70 -

40Crl

50Cr 1

103Crl

103Cr2

105CrlMn60 - 50CrlV23 -

21CrlMo28

40CrlMo28 - 07Cr90Mo55 - -

NEW DESGNATIQNS

(1)

15Cr4Mo6

40CrSMo6

lOCr9MolO

15Crl3Mo6

25Crl3Mo6

lOCr20Mo6

20Cr20Mo6

35CrSMo6V2

40Cr13MolOV2

40Cr7AllOMo2

40Ni14

16Ni3Cr2

16Ni4Cr3

13Nil3Cr3

15Ni16Cr5

35NKr2

30Ni16Cr5

15NiSCr4Mol

15Ni7Cr4Mo2

40Ni6Cr4Mo2

40Ni6Cr4Mo3

31NilOCr3Mo6

4ONilOCr3Mo6

16Ni8Cr6Mo2

20Ni7Mo2

20NiCrMo2

OLD DESIGNATIONS

(2)

15Cr90Mo55 - - 40CrlMo60

lOCr2Mol

15Cr3Mo55 -

25Cr3Mo55 - lOCr5Mo55 -

20CrSMo55 - 35Cr 1 Mo65V25 -- 40Cr3MolV20 - 40Cr2AllMo18 - 40Ni3

16Ni80Cr60 - - 16NilCr80 - 13Ni3Cr80 - 15Ni4Crl

35MilCr60 - 30Ni4Cr 1

15NiCrlMo12 -

15Ni2CrlMol5 - 4OkCrlMolS - 40Ni2Crl Mo28 :

31Ni3Cr65MGS - - 40Ni3Cr65Mo55 - - 16NiCr2Mo20 - 20Ni2Mo25 - 20NiSSCr50Mo20 ---

6

SP:14-1976

SCHEDULE V HIGH ALLOY STEELS STAINLESS AND HEAT

RESISTING STEELS

NEW DESIGNATIONS

(1)

X04Cr 13

X12Crl3

X20Cr13

X30Cr13

X400 13

X05Cr17

X15Cr16Ni2

X105CrlSMo

X02Cr18Nill

X04CrlSNill

X07CrlSNi9

XlOCr17Ni7

XO4CrlSNilOTi

X04CrlSNilONb

X04Cr17Ni12Mo2

X02Cr17Ni12Mo2

X04Cr 17Ni 12Mo2

XlOCr17Mn6Ni4N

X15Cr25N

X15Cr24Ni13

X20Cr25Ni20

X45CrSSi4

XSOCr20Si2Nil

OLD DESIGNATIONS

(2)

04Cr13

12Cr13

20Cr13

30Cr13

40Cr13

05Cr17

15Cr16Ni2

105CrlSMo50 -

02CrlSNill

04CrlSNill

07CrlSNi9

lOCr17Ni7

04CrlSNilOTi20 -

04CrlSNilONb40 -

04Cr17NilZMo2

02Cr17Ni12Mo2

04Crl7Ni12Mo2Ti20

lOCrl7Mn6Ni4NZO -

15Cr25N

15Cr25Ni13

20Cr25Ni20

45Cr9Si4

80Cr20Si2Nil

SCHEDULE VI CARBON AND ALLOY TOOL STEELS

NEW DESIGNATIONS

(1)

5OT8

55T8

6OT6

65T6

70T6

75T6

SOT6

85T6

70T3

SOT3

90T3

102T3

118T3

132T3

T80V2

T90V2

T102V2

TllSCr2V2

T132Cr2V2

T55Cr3

T45Cr6Si4

T55Cr3V2

TSOCr4V2

OLD DESIGNATIONS

(2)

T50

T55

T60

T65

T70Mn65 -

T75

TSOMn65 -

T85

T70

T80

T90

T103

T118

Tl33

TSOV23 -

T90V23 -

T103V23

TllSCr45 -

TI 33Cr45 -

TSSCr70 -

T45Cr lSi95 -

T55Cr70V15

T50CrlV23 -

( Continued )

SP : 14 - 1976

SCHEDULE VI CARBON AND ALLOY TOOL STEELS - Contd

NEW DESIGNATIONS

(1)

TlOSCrS

TlOSCrSMa

T9OMn6WCr2

TSSSi7

TSSSi7Mo3

T60NiS

T4ONi14

T30Ni16CrS

T55Ni6CrMo3

T40Ni6Cr4Mo3

TJiNilOCr3Mo6

T40NilOCr3Mo6

T35CrZOMo14V3

T35Cr20Mo14Vll

T35Cr20Mo14W6V3

T40W8CrSV2

T50W8Cr5V2

T105W6CrV2

Tl lOW6Cr4

OLD DIBIGNATIONS

(2)

TlOSCrl

TlOSCrlMn60 -

T9OMn2WSOCr45 --

TSSSiZMn90 -

TSSSi2Mn90Mo33 - -

T60Nil

T40Ni3

T30Ni4Cr 1

T55Ni2Cr65Mo30 - -

T40Ni2Cr 1 Mo2J

TJlNi3Cr65Mo55 - --

T40Ni3Cr65Mo55 - -

T35Cr5MolV30 -

T35Cr5MoVll -

T35CrSMoWlV30 -

T4OW2CrlV18 -

TSQW2CrlV18 -

T105WZCr6OV25 --

TllOW2Crl

NEW OLD DESIGNATIONS DESIGNATIONS

(1) (2)

T14OW15Cr2 T140W4CrSO -

XT16OCr12 T16OCrl_2

XT215Cr12 T215Cr12 7

XT32W9Cr3V T33W9CrV38 -

XT55W14Cr3V TSSW14Cr3V45 -

XT7OW14Cr4V T70W14Cr4V75 -

XT122W14CoSCrV4 T123W14CoSCrV4

XT70W18Cr4Vl T70W18Cr4Vl

XTdiy 18Co6Cr4V T7$ydlg6Cr4

--

XT75WlSColOCr4V2 T75W18ColOCr4 Mol

XT82MoW6Cr4V2

lOT4

T15Cr3

XTCrSMolV

T16Ni3Cr2

TlZNiSCr4Mol

T16Ni8Cr6Mo2

V2Mol

T83MoW6Cr4V2

TlO

TlSCr65

TlOCrSMo75V23 --

T16Ni8OCr60 -

TlSNiCrlMolZ

T16NiCrZMo20 -

SP : 14 - 1976

APPENDIX A

( Clause 0.2.1 )

INDEX FOR DESIGNATIONS OF STEELS WHICH ARE NOT COVERED IN IS: 1570-1961 BUT ARE

INCLUDED IN INDIAN STANDARDS

INDIAN STANDARD DESIGNATION AS GIVEN NEW DESIGNATION IN WHICH STffL IN THE STANDARD

1s INCLUDED

(1) (2) (3) _

IS : 963 31Cr4Mo2

IS : 2002 Grade 1 13C8* Grade 2A 15C8* Grade 2B 17C8*

IS : 3445 55Crl 55Cr5 60Crl 60Cr5 46NilCr60 46NiSCr2 60NilCr75 6ONi5Cr3

88Cr2 - 88Crb 90Cr2 ‘90Cr8 80Cr2Nil MoSO 80Cr6Ni4Mo5

75Cr2Mo35 - 75Cr8Mo4

85Cr2Mo;V 18 85Cr7MoVl -- 90Cr2V18 90Cr6V2

90&2Mo25V15 90Cr6MoV2

90Cr2W45 - 90Cr8W2

80Ni3CrTW60 80Ni12Cr7W2

45NiCr2W65 45NiCr6W3 -

IS : 3885 (Part I and II) 4OSi2Mnz 4OSi7

IS : 3945 Grade A-N 12c12 Grade B-N 14C16

IS:4398 103CrZMn70 102Cr6Mn

*IS : 2002 does not specify manganese content for these grades. The designation is, therefore, based on the normally accepted average values of manganese for such grades.

9

SP:14-1976

INDIANSTANDARD IN WHICH STEEL

Is INCLUDED

(1)

IS : 4454 (Part I)

IS : 4454 (Part II)

IS:4454 (Part III)

IS: 4454 (Part IV)

IS : 4882

IS : 5489

IS : 5522

IS : 6240

IS : 7226

IS: 7291

IS : 1494

IS : 7557

DESIGNATION AS GIVEN IN THE STANDARD

(2)

Grade 1

Grade 2

Grade 3

Grade 4

SW

VW

lS&lD

2S&2D

Grade 1

Grade 2

-

C28

04Cr19Ni9

07Cr19Ni9

Grade A

Grade B

120Cr35

1 lOCr$Z

T72W18Cr4Vl

T75W18CoSCr4VlMo70

T80W2OCo 12Cr4V2Mo70

T125WColOCrMo4V3 -

T83W6Mo5Cr4V2

T81W6CoMoSCr4V2

Tl lOMolOCo8Cr4Wl

53Cr21Mn9Ni4Nf -

-

NEW DESIGNATION

(3)

62C8

72C6

88C6

88C6

65CS

65C8

50Cr4V2

55Cr3

XlOCrlSNi9

X04Cr17Ni7All

05C4

28C6

X04CrlSNi9

X07CrlSNi9

12C4

15C8

12OCrl

1 lOW9Crl

XT72WlSCr4Vl

XT75W18CoSCr4MoVl

XTSOW20Co12Cr4V2Mol

XT125WColOCrMo4V3

XT83W6Mo5Cr4V2

XTSlW6CoMoSCr4V2

XTllOMolOCo8Cr4W2

18C8

APPENDIX B

( Clause 0.2.1 )

LIST OF REFERRED STANDARDS

IS:

963-1958 Chrome-molybdenum steel ( bars and rods for aircraft purposes ) 2002-1962 Steel plates for boilers 3445-1966 Forged steel rolls 3885 (Part I)-1966 Steel for the manufacture of laminated springs ( railway rolling

stock ), Part I Flat sections 3885 (Part II)-1969 Steel for the manufacture of laminated springs ( railway rolling

stock ), Part II Rib and groove sections 3945-1966 Steel for naval purposes 4398-1972 Carbon chromium steel for the manufacture of balls rollers and bearing

races 4454 (Part I)-1975 Steel wires for cold formed springs, Part I Patented and cold drawn

wires - unalloyed ( firsf revision ) 4454 (Part II)-1975 Steel wires for cold formed springs, Part II Oil-hardened and

tempered spring steel wire and valve spring wire - unalloyed ( first revision 1 .

4454 (Part III)-1975 Steel wires for cold formed springs, Part 111 Oil-hardened and tempered steel wires - alloyed ( $rst rerision )

4454 (Part IV)-1975 Steel wires for cold formed springs, Part IV Stainless spring steel wires for normal corrosion resistance ( first revision )

4882-1968 Low carbon steel wire for rivets for use in bearing industry 5489-1969 Carbonizing steel for use in bearing industry 5522-1969 Stainless steel sheets, coils and circles for utensils and hospitalware 6240-1971 Hot rolled steel sheets for the manufacture of low pressure gas cylinders 7226-1974 Cold rolled medium, high carbon and low alloy steel strip for general

engineering purposes 7291-1974 High speed tool steel 7494-1974 Steel for valves for internal combustion engines 7557-1974 Steel valves for internal combustion engines

11

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