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BS 970 (Part 1) 040A12 vs BS 970 (Part 1) 055M15

Strong Match — 89.3% match based on chemical composition and mechanical property overlap.

BS 970 (Part 1) 040A12 (BS 970 (Part 1):1991) and BS 970 (Part 1) 055M15 (BS 970 (Part 1):1991) are both steel grades. Both fall under the Carbon Steel category. BS 970 (Part 1) 040A12 is typically used for as-rolled, or as-rolled and softened, steel (section two), while BS 970 (Part 1) 055M15 is commonly used for as-rolled, or as-rolled and softened, steel (section two). BS 970 (Part 1) 040A12 is defined under British Standards (BS), originating from United Kingdom, while BS 970 (Part 1) 055M15 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, BS 970 (Part 1) 040A12 vs BS 970 (Part 1) 055M15 is a 89.3% 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 89.3%.

Frequently Compared With BS 970 (Part 1) 040A12:
BS 970 (Part 1) 060A62 BS 970 (Part 1) 040A10 BS 970 (Part 1) 060A72 BS 970 (Part 1) 060A81 BS 970 (Part 3) 045M10 BS 970 (Part 1) 060A67 BS 970 (Part 1) 060A78 BS 970 (Part 1) 070A67 BS 970 (Part 1) 045A10 BS 970 (Part 3) 070M55 BS 970 (Part 3) 070M20 BS 970 (Part 1) 080A15
Match Breakdown
CHEMISTRY MATCH
89.3%
MECHANICAL MATCH
No shared data
OVERALL
89.3%
Specifications
Property BS 970 (Part 1) 040A12 BS 970 (Part 1) 055M15
Standard BS 970 (Part 1):1991 BS 970 (Part 1):1991
Category Carbon Steel Carbon Steel
C (%) 0.10-0.15 <=0.20
Mn (%) 0.30-0.50 <=0.80
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) 040A12 BS 970 (Part 1) 055M15
Condition Not specified As-rolled
Tensile Strength Not specified 310 MPa min
Elongation Not specified 25 % min
Hardness Not specified 121 HB min
Typical Applications
BS 970 (Part 1) 040A12
As-rolled, or as-rolled and softened, steel (section two)
BS 970 (Part 1) 055M15
As-rolled, or as-rolled and softened, steel (section two)
Can BS 970 (Part 1) 040A12 Be Substituted With BS 970 (Part 1) 055M15?
BS 970 (Part 1) 040A12 and BS 970 (Part 1) 055M15 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 055M15 is often considered as a substitute for BS 970 (Part 1) 040A12 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) 040A12
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BS 970 (Part 1) 055M15
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Frequently Asked Questions
What is the difference between BS 970 (Part 1) 040A12 and BS 970 (Part 1) 055M15?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can BS 970 (Part 1) 040A12 be substituted with BS 970 (Part 1) 055M15?
BS 970 (Part 1) 040A12 and BS 970 (Part 1) 055M15 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 055M15 is often considered as a substitute for BS 970 (Part 1) 040A12 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.