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IS 1570 (Part 4):1988 37C15 Steel: Specifications & Listings

IS 1570 (Part 4):1988 37C15: 37C15: alloy steel (constructional or spring group) with specified chemical composition. Specified in IS 1570 (Part 4):1988.

Category: Carbon Steel
Grade Details
GradeIS 1570 (Part 4):1988 37C15
Standard IS 1570 (Part 4):1988
Equivalent / Similar Grades
Grade Standard Region Live on M-EX
IS 4367 37C15 IS 4367:1991 India 1 listing, 1 RFQ →
IS 11169 (Part 1) 37C15 IS 11169 (Part 1):2022 India No activity yet
SAE J403 1541 SAE J403:2001 USA No activity yet
BS 970 (Part 3) 150M36 BS 970 (Part 3):1991 UK No activity yet
BS 970 (Part 1) 150M40 BS 970 (Part 1):1983 UK No activity yet
Grade ComparisonCompare With a Specific Grade →
Grade Standard Match
BS 970 (Part 3) 150M36 BS 970 (Part 3):1991 Strong Match
BS 970 (Part 1) 150M36 BS 970 (Part 1):1983 Strong Match
BS 970 (Part 1) 150M40 BS 970 (Part 1):1983 Strong Match
SAE J403 1541 SAE J403:2014 Strong Match
BS 970 (Part 1) 120M36 BS 970 (Part 1):1983 Strong Match
SAE J403 1541 SAE J403:2001 Strong Match
SAE J403 1541 SAE J403:2009 Strong Match
SAE J403 1536 SAE J403:2014 Strong Match
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Chemical Composition (%)
C Si Mn
0.32-0.42 0.10-0.35 1.30-1.70
Mechanical Properties
Tensile Strength 890-1040 MPa
Yield Strength >=650 MPa (0.2 % proof stress)
Elongation >=15%
Izod Impact >=41 J
Hardness 255-311 HBS (guidance only)
Condition Bars and forgings, hardened and tempered (oil hardened unless stated), limiting ruling section 15 mm

More data from IS 1570 (Part 4):1988

From the standard
Properties, hardened and tempered 4 strength levels
Limiting ruling section (mm)Tensile strength (MPa)0.2 % proof stress, min (MPa)Elongation, min (%)Izod impact, min (J)Brinell hardness (HBS)
150590-7403901848170-217
100690-8404901848201-248
30790-9405501648229-277
15890-10406501541255-311
Bars and forgings, oil hardened unless stated; hardness is for guidance only.
Source: IS 1570 (Part 4):1988, Table 4

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