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BS 970 EN15A vs BS 970 (Part 1) 055M15

Minimal Match — 52.7% match based on chemical composition and mechanical property overlap.

BS 970 EN15A (BS 970:1955) and BS 970 (Part 1) 055M15 (BS 970 (Part 1):1991) 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) 055M15 is commonly used for as-rolled, or as-rolled and softened, steel (section two). BS 970 EN15A 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 EN15A vs BS 970 (Part 1) 055M15 is a 79% match. As per mechanical properties, the match is 0%. Combined, this makes them a minimal match overall at 52.7%.

Frequently Compared With BS 970 EN15A:
BS 970 (Part 1) 040A04 BS 970 (Part 1) 040A10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 060A32 BS 970 (Part 1) 040A12 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045A10 BS 970 (Part 3) 045M10 BS 970 (Part 3) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 060A40 BS 970 (Part 1) 060A45
Match Breakdown
CHEMISTRY MATCH
79%
MECHANICAL MATCH
0%
OVERALL
52.7%
Specifications
Property BS 970 EN15A BS 970 (Part 1) 055M15
Standard BS 970:1955 BS 970 (Part 1):1991
Category Carbon Steel Carbon Steel
C (%) 0.30-0.40 <=0.20
Si (%) 0.05-0.35 Not specified
Mn (%) 1.30-1.70 <=0.80
S (%) <=0.060 Not specified
P (%) <=0.060 Not specified
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) 055M15
Tensile Strength ≥618 MPa (40 tons/sq in, converted) 310 MPa min
Yield Strength ≥432 MPa (28 tons/sq in, converted) Not specified
Elongation ≥22% 25 % min
Hardness 179-229 HB 121 HB min
Condition Hardened and tempered Q, ruling section 4 in (lowest-strength condition of the standard) As-rolled
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) 055M15
As-rolled, or as-rolled and softened, steel (section two)
Key Differences
Can BS 970 EN15A Be Substituted With BS 970 (Part 1) 055M15?
BS 970 EN15A 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 EN15A
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BS 970 (Part 1) 055M15
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Frequently Asked Questions
What is the difference between BS 970 EN15A and BS 970 (Part 1) 055M15?
BS 970 EN15A specifies Si, S, P which are not specified for BS 970 (Part 1) 055M15.
Can BS 970 EN15A be substituted with BS 970 (Part 1) 055M15?
BS 970 EN15A 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.