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BS 970 EN15A vs BS 970 (Part 1) 150M40

Strong Match — 87.2% match based on chemical composition and mechanical property overlap.

BS 970 EN15A (BS 970:1955) and BS 970 (Part 1) 150M40 (BS 970 (Part 1):1983) are both steel grades. Both fall under the Carbon Steel category. BS 970 EN15A is typically used for bars and billets for forging; forgings and drop-forgings; bars for machining; bright bars. suitable for 40/50 (q), 45/55 (r), 50/60 (s) tons/sq in according to ruling section., while BS 970 (Part 1) 150M40 is commonly used for through hardening steel for mechanical and allied engineering purposes; supplied in the hardened and tempered conditions of table 6.. BS 970 EN15A is defined under British Standards (BS), originating from United Kingdom, while BS 970 (Part 1) 150M40 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, BS 970 EN15A vs BS 970 (Part 1) 150M40 is a 87.2% 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 87.2%.

Frequently Compared With BS 970 EN15A:
BS 970 (Part 1) 060A32 BS 970 (Part 1) 040A04 BS 970 (Part 1) 040A10 BS 970 (Part 1) 040A12 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 3) 045M10 BS 970 (Part 1) 045A10 BS 970 (Part 3) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 055M15 BS 970 (Part 1) 060A40
Match Breakdown
CHEMISTRY MATCH
87.2%
MECHANICAL MATCH
No shared data
OVERALL
87.2%
Specifications
Property BS 970 EN15A BS 970 (Part 1) 150M40
Standard BS 970:1955 BS 970 (Part 1):1983
Category Carbon Steel Carbon Steel
C (%) 0.30-0.40 0.36-0.44
Si (%) 0.05-0.35 Not specified
Mn (%) 1.30-1.70 1.30-1.70
S (%) <=0.060 <=0.050
P (%) <=0.060 <=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 BS 970 EN15A BS 970 (Part 1) 150M40
Tensile Strength ≥618 MPa (40 tons/sq in, converted) Not specified
Yield Strength ≥432 MPa (28 tons/sq in, converted) Not specified
Elongation ≥22% Not specified
Hardness 179-229 HB Not specified
Condition Hardened and tempered Q, ruling section 4 in (lowest-strength condition of the standard) Not specified
Typical Applications
BS 970 EN15A
Bars and billets for forging; forgings and drop-forgings; bars for machining; bright bars. Suitable for 40/50 (Q), 45/55 (R), 50/60 (S) tons/sq in according to ruling section.
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 BS 970 EN15A Be Substituted With BS 970 (Part 1) 150M40?
BS 970 EN15A 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 BS 970 EN15A 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 EN15A
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BS 970 (Part 1) 150M40
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Frequently Asked Questions
What is the difference between BS 970 EN15A and BS 970 (Part 1) 150M40?
BS 970 EN15A specifies Si which is not specified for BS 970 (Part 1) 150M40.
Can BS 970 EN15A be substituted with BS 970 (Part 1) 150M40?
BS 970 EN15A 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 BS 970 EN15A in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.