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Disclosure to Promote the Right To Information
Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public.
इंटरनेट मानक
“!ान $ एक न' भारत का +नम-ण”Satyanarayan Gangaram Pitroda
“Invent a New India Using Knowledge”
“प0रा1 को छोड न' 5 तरफ”Jawaharlal Nehru
“Step Out From the Old to the New”
“जान1 का अ+धकार, जी1 का अ+धकार”Mazdoor Kisan Shakti Sangathan
“The Right to Information, The Right to Live”
“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता है”Bhartṛhari—Nītiśatakam
“Knowledge is such a treasure which cannot be stolen”
“Invent a New India Using Knowledge”
है”ह”ह
IS 9175-15 (1987): Rationalized Steels for Automobile andAncillary Industry, Mechanical and Physical Properties -Part 15 37C15 Grade steel [MTD 16: Alloy Steels andForgings]
IS : 9175 ( Part 15 ) - 1987
Indian Standard SPECIFICATION FOR
RATIONALIZED STEELS FOR THE AUTOMOBILE AND ANCILLARY INDUSTRY
PART 15 MECHANICAL AND PHYSICAL PROPERTIES OF 37C15 GRADE STEEL
Co-ordinating Committee on Materials for Automobiles, SMDC 31 Chairman Representing
SHRI C. ct. TIKEKAR Tata Engineering & Locomotive Co Ltd, Jamshedpur
Members SHRI A. K. ROY ( AIternate to
Shri C. V. Tikekar ) SHRI V. P. AGRAWAL Steel Authority of India Ltd ( Rourkela Steel
Plant ), Rourkela SHRI A. K. MALAOTRA ( Alternate )
SHRI R. BHANDARI All India Automobile and Ancillary Industries Association, Bombay
SHRI S. PANIKAR ( Alternate ) SHRI R. BHATTAGHARYYA Guest Keen Williams Ltd. Calcutta SHRI A. T. BORATIZ Premier Automobiles Ltd. Bombay
SHRI J. M. SHAH ( AIternate ) SHRI R. R. CONTRACTOR Automobile Product of India Ltd. Bombay
SHRI V. A. RAIAMONEY ( Alternate ) SHRI S. P. DEY Hindustan Motors Ltd. West Bengal SHRI V. GOPAL Lucas-TVS Ltd, Madras
SHRI K. S. SUBRAMANIAN (Alternate ) SHRI D. N. GUPTA Bokaro Steel Plant ( SAIL ), Bokaro SHRI S. C. GWI’A Tata Iroo & Steel Co Ltd, Jamshedpur
DR A. N. MITRA ( Alternate ) SHRI H. A. J~ISINOHANI Mahiodra and Mahindra Ltd, Bombay
SHRI S. RAMACHANDRAN (Alternate ) SHRI R. C. J.HA Steel Authority of India Ltd, (ASP), Durgapur
SHRI R. C. MODI ( Alternate ) SHRI M. L. KATYAL Bajaj Auto Limited, Pune
SHRI S. R. SALGIA ( Alternate ) SHRI S. S. LAKHUNDI Bharat Forge Co Ltd, Pune
DR M. K. S. CHERUKURN ( Alternate ) ( Continued on page 2 )
0 Copyright 1988
BUREAU OF INDIAN STANDARDS
This publication is protected under the Indian Copyrighf Act ( 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.
IS : 9175 ( Part 15 ) - 1987
< Continued from page 1 )
Members Representing
SHRI S. C. MAHINDRU Chief Inspectorate of Heavy Vehicles, Avadi SHRI P. SOMASUNDRAM (Alternate)
COL P. M. MENON Directeq&te of Standardization ( DGI ), New
DR V. PANDURANGA Tractors and Farm Equipment Ltd, Madras SHRI T. K. SUBBARAYAN ( Alternate )
. SHRI K. PARTHASARTHY A&ok Leyland Ltd, Madras SHRI T. S. SUDARSHAN( Alternate)
Dn P. G. PATANKAR (Alternate)
Central Institute of Road Transport, Pune SHRI L. SHANTARAM
DR R. V. PATHY SHRI R. N. SINGH (Alternate )
Mahindra Ugine Steel Co Ltd. Bombay
SHRI G. R. PRAKASH Visvesvarya Iron & Steel Ltd, Bhadravati SHRI B. HARIDASACHAR ( Alternate )
SHRI R. RA~HAVAN Enfield India Ltd, Tiruvottiyur SHRI T. M. BALARAMAN ( Alternate )
SHRI AJAY KUMAR RAMAN SHRI S. D. KHANNA ( Afternate )
Escorts Ltd, Faridabad
DR V.RAMASWAMY SAIL ( Research & Development Centre for Iron and Steel ), Ranchi
SHRI S. R. MEDIRATTA ( Alternate ) SHRI C. V. K. MURTHY RAO ’ Association of Indian Automobile Maaufzc.
turers, Bombay SHRI S. P. RAO WG Fmge and Allied Induitries Ltd, Thane
SHRI B. K. ANANTHARAMIAH ( Alternate ) SHRI ANANTHA REDDY
SHRI J. SRINIVAS ( Alternate ) Nagarjuna Steels Ltd, Hyderabad ,
REPESENTATIVE Ministry of Defence ( DGI ), New Delhi REPRESENTATIVE Automotive Research Association of India.
SHRI A. S. SAUND Pune
SHRI B. S. SAUND ( Afternate ) Saund Zweired Union (I) Ltd, Gwalior
SHRI K. SHANKARANARAYANAN Directorate General of Technical Development New Delhi
SHRI S. K. SHARMA SHRI T. R. SEHGAL ( Alternate )
Ministry of Industrial Development, New Delhi
SHRI A. R. SONALKAR SHRI A. R. JANIKA (Alternate)
Mahindra and Mahindra Ltd Bombay
SHRI L. SRINIVASAMADHVAN The StMa;Ta;d Motor Products of India Ltd,
SHRI K. RANGANATHAN ( Alternate ) SHRI M. S. GANAPATHY Mopeds ( India ) Ltd. Tiruoathi _
SUBRAMANIAM SHRI A. G. NAMMALVAR ( Alternate )
SHRI S. TIWARI Directorate General of Ordnance Factories, Calcutta
SHRI G. N. ROY ( Alternate ) , SHRI K. RAGHAVENDRAN,
Director (Strut & Met ) Director General, BIS ( J&officio Member )
Secretary SHRI B. K. MUKHOPADHAYAY
Assistant Director ( Metals ), BIS ( Continued on page 11 )
2
IS : 9175 ( Part 15 ) - 1987
Indian Standard SPECIFICATION FOR
RATIONALIZED STEELS FOR THE AUTOMOBILE AND ANCILLARY INDUSTRY PART 15 MECHANICAL AND PHYSICAL PROPERTIES OF
37C15 GRADE STEEL
0. FOREWORD
0.1 This Indian Standard (Part 15) was adopted by the Bureau of Indian Standards on 29 October 1987, after the draft finalized by the Co- ordinating Committee on Materials for Automobiles had been approved by the Structural and Metals Division Council.
0.2 Part 1 of IS : 9175* was published in 1979 which covers the chemi- cal composition of 33 rationalized steels. The mechanical properties, hardenability and isothermal transformation characteristics of these 33 rationalized steels are being covered in different parts of this standard (Parts 2 to 34). The data concerning these properties given in this standard is only for guidance and information purposes.
0.3 For the purpose of deciding whether a particular requirement of this standard is complied with, the final value, observed or calculated, expressing the result of a test or analysis, shall be rounded off in accord- ance with IS : 2-19607. The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard.
1. SCOPE
1.1 This standard (Part 15) covers the chemical composition, mechanical properties, hardenability and isothermal transformation characteristics of 37C15 grade steel for use by automobile and ancillary industry.
1.2 This is an unalloyed steel, intended to be used in the hardened and tempered condition.
*Specification for rationalized steels for the automobile and ancillary industry t Part 1 Chemical composition.
TRules for rounding off numerical values (revised).
3
IS : 9175 ( Part 15 ) - 1987
2. CHEMICAL COMPOSITION
2.1 The chemical composition of this grade of steel shall be as given below:
Constifuents, Percent ~~~~~~~~_- ---. -- h-_----------_--~
0*3:042 O~lO%35 Mn s P
1’30-1’70 0’035, Max 0’035, Max
3. HARDNESS
3.1 The maximum hardness for this grade of steel delivered in the annealed or normalized condition when determined in accordance with IS : 1500-1973+ shall be 220 HB.
4. MECHANICAL PROPERTIES
4.1 The mechanical properties of this grade of steel in the hardened and tempered condition when determined in accordance with IS : 159%1977t and IS : 160%1972$ shall be as given in Table 1.
TABLE 1 MECHANICAL PROPERTIES IN THE HARriENED AND TEMPERED CONDITION
p&r;-
SECTION
(1)
TENSILE 0.2 PERCENT ELONGATION IZOD HARDNESS STRENGTH PROOF STRESS, G.L.=5*65d/sQ IMPACT, MPa Min Min, PERCENT Min
MP2i HB (2) 13) (4) (6)
100 60@750 440 :: 48 170-217
j”: 700.850 800-950 600 540’ 16 48 48 201-248 229-277 15 900-l 0.50 700 15 41 255-3 11
5. HOT WORKING AND HEAT TREATMENT TEMPERATURES
5.1 The recommended hot working and heat treatment temperatures shall be as given below:
a) Forging/rolling temperature 1 200°C b) Normalizing temperature 850~870°C c) Annealing temperature 840-870°C d) Process annealing temperature 600-660°C
*Method for Brine11 hardness test for mettalic materials ( second revision ). TMethod for Izod impact test of metals (firsf revision ). IMethod for tensile testing of steel products (first revision ).
4
IS : 9175 ( Part 15 ) - 1987
e) Hardening temperature 850-870°C f) Tempering temperature 6OO”C, Max
6. TRANSFORMATION CHARACTERISTICS
6.1 The isothermal transformation diagram for this grade of steel is given in Fig. 1.
'0° 1200 t
600 - 1000
5 500 - h 800 K:oo -
i!
E 300 600
-’
c 200 boo -
100 - 200
O- 0.
8 86
15
18
21
33 Ll
46
59
5 1 2 5 10' to2 103 10‘ 105 166
TIME-SECONDS
Chemical Composition, Percent r_-----_-A -_A-_--- 7
C Mn o-43 1’58
FIG. 1 ISOTHERMAL TRANSFORMATION DIAGRAM FOR 37C15 GRADE STEEL
5
IS : 9175 ( Part 15 ) - 1987
7. HARDENABILITY
7.1 The end quench hardenability curve is given in FJ~.
50
45
LO
35 v “I 30
$ 25
Y 0 20 (r: a I 15
10
5
1 t I
0 5 10 15 20 25 30 35 LO 45 50
DISTANCE FROM THE QUENCHED END FACE IN mm
Distance, mm 1 2 3 4 5 6 7 8 9 10 152025 304050
HRC, Min 50 50 48 47 45 43 38 35 32 30 20 13 - - - -
HRC, MUX 59 59 58 57 56 56 55 54 52 51 454037343333
FIG. 2 END QUENCH HARDENABILITY TEST DATA OF 37C15 GRADE STEEL
6
IS : 9175 ( Part 15 ) - 1987
8. EFFECT OF TEMPERING ON MECHANICAL PROPERTIES
8.1 The curve for effect of tempering on the mechanical properties of the steel is given in Fig. 3 and 4.
9. EFFECT OF SECTION SIZE ON MECHANICAL PROPERTIES
9.1 The curves for the effect of section size on mechanical properties are given in Fig. 5 to 7.
BARS 38-l mm dia. OIL QUENCHED 860°C
1200
1050
900
750
n 600 :
L50
300
150
0
go
80
70
60
w 5o
2 + LO
2
: 30 aw
20
10
0
E LONGATfON
100 200 300 LOO 500 600 700
TEMPERING TEMPERATURE ‘C
c 110
100
90
80
70
6o z.
: 5o 0 Y.
GO
30
20
10
0
FIG. 3 CURVES SHOWING THE EFFECT OF TEMPERING TEMPERATURE
ON MECHANICAL PROPERTIES OF 37C15 GRADE STEEL
7
IS :9175(PartlS) - 1987
90
80
60 w
: 50 Li
i LO W
a 30
10
BARS 38.7 mm dia WATER QUENCHED 86O’C
I I I IZOD IMPACT-._
I I
REDUCTION _OF AREA1
i ELONGATION !J
I
- 1350 r-108
- 1200 -100
- 90 - 1050
- 80
- 900 -70 y
- 75og .-60 ;
- 500 - 50
-LO - 450
- 30
- 300 -20
- 150
500 600 700 /
TEMPERING TEMPERATLJRE,‘C c f
Fro. 4 CURVES SHOWING THE EFFECT OF TEMPERING TEMPERATURE
ON MECHANICAL PROPERTIES OF 37ClS GRADE STEEL
8
IS : 9175 ( Part 15 ) - 1987 *
NORMALIZED FROM 86O’C 88~ 1050 -m 70
80 - 900 - 60
70 -
60 - 750 - g 50
y50 - 2
600 - 2 LO
$ 10 -.
W
a” u
I: L50 - : 30 a
30 - 300 : 20
20 -
- 10 - 150 10
0” O- 0
0 25 50 75 100 125 150
SECTION SIZE (mm)
;FIG. 5 EFFECT OF SECTION SIZE ON MECHANICAL PROPERTIES OF 37C15 GRADE STEEL
80
OIL QUENCHED 86O’C TEMPERED
I L REDiJCTIOkl OF' ARE/i
6OO’C AC
- 1200 +- 100
-1050 90
-.9@0 -80
..750 g -70 ;
-60 -V -600
-50
L50 -LO
-300 4-30 0 25 50 75 100 125 150
SECTION SIZE (mm )
,FIG. 6 EFFECT OF SECTION SIZE ON MECHANICAL PROPERTIES OF 37C15 GRADE STEEL
9
IS : 9175 ( Part 15 ) - 1987
1200 - 80
1050 - 70
r 900 - 60
q 750 - g !k a 50
z 600 - ij 10
ifi ,:t 450 o, - 30
300 - 20
OIL QUENCHED 860°C AC
ty--e’
I
STRENGTH 1
- 100
- 90
- 80
- 70
- 6o w
- 50 2
T - LO
- 30
- 20
- 10
- 0
0 25 50 75 100 125 150 SECTION SIZE (mm)
FIG. 7 EFFECT OF SECTION SIZE ON MECHANICAL PROPERTIES OF 37C15 GRADE STEEL
10
IS : 9175 ( Part 15 ) - 1987
( Continued from page 2 )
Panel to Collect Data on Steer ror Automobile Purpose, SMDC 31/P-12
Convener Representing
DR R. V. PATHY Mahiadra Ugine Steel Co Ltd, Khopoli
Members
SHRI B. K. ANANTHARAMAIH SHRI 0. B. DIAS ( Alternate )
WG Forge and Allied Industries Ltd, Thane
PROP R. C. CHATURVEDI Indian Institute of Technology, Bombay SHRI B. HARIDASACHAR Visvesvaraya Iron and Steel Ltd. Bhadravati
SHRI D. P. VERNEKAR ( Alternate ) SHRI H. A. JAISINGHANI Mahindra and Mahindra Ltd, Bombay SHRI M. G. LAWATE Tata Engineering & Locomotive Co Ltd, Pune DR V. RAMASWAMY Research and Development Centre for Iron &
Steel ( R & D Centre ) Raochi SHRI S. R. MEDIRA~TA ( Alternate )
REPRESENTATIVE Automobile Products of India Ltd, Bombay DR K. R. SATYANARAYANAN College of Engineers, Pune
DR R. D. CHAUDHARI ( Alternate )
11
INTERNATIONAL SYSTEM OF UNITS ( SI UNITS)
Base Units
Quantity
Length
Mass
Time
Electric current
Thermodynamic temperature
Luminous intensity
Amount of substance
Sopplementary Units
Quantity
Plane angle
Solid angle
Derived Units
Quantity
Force
Energy
Power
Flux
Flux density
Frequency
Electric conductance
Electromotive force
Pressure, stress
Unit
metre
kilogram
second
ampere
kelvin
candela
mole
Unit
radian
ateradian
Unit
newton
joule
watt
weber
tesla
hertz
siemens
volt
paacal
Symbol
m
kg
8
A
K
cd
mol
Symbol
rad
sr
Symbol
.N
J
W
Wb
T
Hz
S
V
Pa
Definition
1N = 1 kg,m/s*
1J = I N.m
IW = 1 J/s
1 Wb = 1 V.8
1T = 1 Wb/m*
1 Hz = 1 C/8( 8-l)
IS - 1 A/V
1v - 1 W/A
1 Pa = 1 N/ma
Recommended