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IS 1570 (Part 4) 37C15 vs BS 970 (Part 1) 150M40

Strong Match — 90% match based on chemical composition and mechanical property overlap.

IS 1570 (Part 4) 37C15 (IS 1570 (Part 4):1988) and BS 970 (Part 1) 150M40 (BS 970 (Part 1):1983) are both steel grades. Both fall under the Carbon Steel category. IS 1570 (Part 4) 37C15 is defined under Bureau of Indian Standards (IS), originating from India, while BS 970 (Part 1) 150M40 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, IS 1570 (Part 4) 37C15 vs BS 970 (Part 1) 150M40 is a 90% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a strong match overall at 90%.

Frequently Compared With IS 1570 (Part 4) 37C15:
BS 970 (Part 3) 070M55 BS 970 (Part 1) 040A10 BS 970 (Part 1) 040A04 BS 970 (Part 1) 040A12 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 3) 045M10 BS 970 (Part 1) 055M15 BS 970 (Part 1) 060A32 BS 970 (Part 1) 045A10 BS 970 (Part 3) 045A10 BS 970 (Part 1) 045M10
Match Breakdown
CHEMISTRY MATCH
90%
MECHANICAL MATCH
No shared data
OVERALL
90%
Specifications
Property IS 1570 (Part 4) 37C15 BS 970 (Part 1) 150M40
Standard IS 1570 (Part 4):1988 BS 970 (Part 1):1983
Category Carbon Steel Carbon Steel
C (%) 0.32-0.42 0.36-0.44
Si (%) 0.10-0.35 Not specified
Mn (%) 1.30-1.70 1.30-1.70
P (%) Not specified <=0.050
S (%) Not specified <=0.050
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property IS 1570 (Part 4) 37C15 BS 970 (Part 1) 150M40
Tensile Strength 890-1040 MPa Not specified
Yield Strength >=650 MPa (0.2 % proof stress) Not specified
Elongation >=15% Not specified
Izod Impact >=41 J Not specified
Hardness 255-311 HBS (guidance only) Not specified
Condition Bars and forgings, hardened and tempered (oil hardened unless stated), limiting ruling section 15 mm Not specified
Typical Applications
IS 1570 (Part 4) 37C15
Not documented
BS 970 (Part 1) 150M40
Through hardening steel for mechanical and allied engineering purposes; supplied in the hardened and tempered conditions of Table 6.
Key Differences
Can IS 1570 (Part 4) 37C15 Be Substituted With BS 970 (Part 1) 150M40?
IS 1570 (Part 4) 37C15 and BS 970 (Part 1) 150M40 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 150M40 is often considered as a substitute for IS 1570 (Part 4) 37C15 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
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IS 1570 (Part 4) 37C15
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BS 970 (Part 1) 150M40
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Frequently Asked Questions
What is the difference between IS 1570 (Part 4) 37C15 and BS 970 (Part 1) 150M40?
IS 1570 (Part 4) 37C15 specifies Si which is not specified for BS 970 (Part 1) 150M40. BS 970 (Part 1) 150M40 specifies P, S which are not specified for IS 1570 (Part 4) 37C15.
Can IS 1570 (Part 4) 37C15 be substituted with BS 970 (Part 1) 150M40?
IS 1570 (Part 4) 37C15 and BS 970 (Part 1) 150M40 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 150M40 is often considered as a substitute for IS 1570 (Part 4) 37C15 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.