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

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

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

As per chemical composition, BS 970 (Part 1) 150M40 vs IS 1570 (Part 4) 37C15 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 BS 970 (Part 1) 150M40:
BS 970 (Part 1) 045A10 BS 970 (Part 1) 040A12 BS 970 (Part 1) 040A04 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) 060A40 BS 970 (Part 1) 060A45 BS 970 (Part 1) 040A10 BS 970 (Part 3) 045A10
Match Breakdown
CHEMISTRY MATCH
90%
MECHANICAL MATCH
No shared data
OVERALL
90%
Specifications
Property BS 970 (Part 1) 150M40 IS 1570 (Part 4) 37C15
Standard BS 970 (Part 1):1983 IS 1570 (Part 4):1988
Category Carbon Steel Carbon Steel
C (%) 0.36-0.44 0.32-0.42
Mn (%) 1.30-1.70 1.30-1.70
P (%) <=0.050 Not specified
S (%) <=0.050 Not specified
Si (%) Not specified 0.10-0.35
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property BS 970 (Part 1) 150M40 IS 1570 (Part 4) 37C15
Tensile Strength Not specified 890-1040 MPa
Yield Strength Not specified >=650 MPa (0.2 % proof stress)
Elongation Not specified >=15%
Izod Impact Not specified >=41 J
Hardness Not specified 255-311 HBS (guidance only)
Condition Not specified Bars and forgings, hardened and tempered (oil hardened unless stated), limiting ruling section 15 mm
Typical Applications
BS 970 (Part 1) 150M40
Through hardening steel for mechanical and allied engineering purposes; supplied in the hardened and tempered conditions of Table 6.
IS 1570 (Part 4) 37C15
Not documented
Key Differences
Can BS 970 (Part 1) 150M40 Be Substituted With IS 1570 (Part 4) 37C15?
BS 970 (Part 1) 150M40 and IS 1570 (Part 4) 37C15 overlap closely enough on chemistry and mechanical properties that IS 1570 (Part 4) 37C15 is often considered as a substitute for BS 970 (Part 1) 150M40 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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BS 970 (Part 1) 150M40
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IS 1570 (Part 4) 37C15
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Frequently Asked Questions
What is the difference between BS 970 (Part 1) 150M40 and IS 1570 (Part 4) 37C15?
BS 970 (Part 1) 150M40 specifies P, S which are not specified for IS 1570 (Part 4) 37C15. IS 1570 (Part 4) 37C15 specifies Si which is not specified for BS 970 (Part 1) 150M40.
Can BS 970 (Part 1) 150M40 be substituted with IS 1570 (Part 4) 37C15?
BS 970 (Part 1) 150M40 and IS 1570 (Part 4) 37C15 overlap closely enough on chemistry and mechanical properties that IS 1570 (Part 4) 37C15 is often considered as a substitute for BS 970 (Part 1) 150M40 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.