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BS 970 (Part 1) 125A15 vs BS 970 (Part 1) 055M15

Related Material — 58.6% match based on chemical composition and mechanical property overlap.

BS 970 (Part 1) 125A15 (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) 125A15 is typically used for case hardening steel (section four), while BS 970 (Part 1) 055M15 is commonly used for as-rolled, or as-rolled and softened, steel (section two). BS 970 (Part 1) 125A15 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) 125A15 vs BS 970 (Part 1) 055M15 is a 87.9% match. As per mechanical properties, the match is 0%. Combined, this makes them a related material overall at 58.6%.

Frequently Compared With BS 970 (Part 1) 125A15:
BS 970 (Part 1) 060A67 BS 970 (Part 1) 080A15 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) 060A72 BS 970 (Part 1) 040A04 BS 970 (Part 3) 045A10 BS 970 (Part 1) 060A62 BS 970 (Part 1) 060A78
Match Breakdown
CHEMISTRY MATCH
87.9%
MECHANICAL MATCH
0%
OVERALL
58.6%
Specifications
Property BS 970 (Part 1) 125A15 BS 970 (Part 1) 055M15
Standard BS 970 (Part 1):1991 BS 970 (Part 1):1991
Category Carbon Steel Carbon Steel
C (%) 0.13-0.18 <=0.20
Mn (%) 1.10-1.40 <=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) 125A15 BS 970 (Part 1) 055M15
Condition Case hardened, 19 mm test bar As-rolled
Tensile Strength 650 MPa min 310 MPa min
Elongation 14 % min 25 % min
Hardness Not specified 121 HB min
Typical Applications
BS 970 (Part 1) 125A15
Case hardening steel (section four)
BS 970 (Part 1) 055M15
As-rolled, or as-rolled and softened, steel (section two)
Can BS 970 (Part 1) 125A15 Be Substituted With BS 970 (Part 1) 055M15?
BS 970 (Part 1) 125A15 and BS 970 (Part 1) 055M15 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.
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BS 970 (Part 1) 125A15
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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) 125A15 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) 125A15 be substituted with BS 970 (Part 1) 055M15?
BS 970 (Part 1) 125A15 and BS 970 (Part 1) 055M15 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.