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BS 970 EN4A vs BS 970 (Part 1) 055M15

Related Material — 59.6% match based on chemical composition and mechanical property overlap.

BS 970 EN4A (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 EN4A is typically used for bright bars for machining. (as altered feb. 1955), while BS 970 (Part 1) 055M15 is commonly used for as-rolled, or as-rolled and softened, steel (section two). BS 970 EN4A 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 EN4A vs BS 970 (Part 1) 055M15 is a 89.3% match. As per mechanical properties, the match is 0%. Combined, this makes them a related material overall at 59.6%.

Frequently Compared With BS 970 EN4A:
BS 970 (Part 1) 040A10 BS 970 (Part 1) 045A10 BS 970 (Part 3) 070M20 BS 970 (Part 1) 040A04 BS 970 (Part 1) 040A12 BS 970 (Part 3) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 045M10 BS 970 (Part 3) 045M10 BS 970 (Part 1) 060A32 BS 970 (Part 1) 060A40 BS 970 (Part 1) 045A10
Match Breakdown
CHEMISTRY MATCH
89.3%
MECHANICAL MATCH
0%
OVERALL
59.6%
Specifications
Property BS 970 EN4A BS 970 (Part 1) 055M15
Standard BS 970:1955 BS 970 (Part 1):1991
Category Carbon Steel Carbon Steel
C (%) <=0.30 <=0.20
Si (%) 0.05-0.35 Not specified
Mn (%) <=1.00 <=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 EN4A BS 970 (Part 1) 055M15
Tensile Strength 494-649 MPa (32-42 tons/sq in, converted) 310 MPa min
Elongation ≥12% 25 % min
Condition , ruling section 2 in (lowest-strength condition of the standard) As-rolled
Hardness Not specified 121 HB min
Typical Applications
BS 970 EN4A
Bright bars for machining. (As altered Feb. 1955)
BS 970 (Part 1) 055M15
As-rolled, or as-rolled and softened, steel (section two)
Key Differences
Can BS 970 EN4A Be Substituted With BS 970 (Part 1) 055M15?
BS 970 EN4A 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 EN4A
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BS 970 (Part 1) 055M15
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Frequently Asked Questions
What is the difference between BS 970 EN4A and BS 970 (Part 1) 055M15?
BS 970 EN4A specifies Si, S, P which are not specified for BS 970 (Part 1) 055M15.
Can BS 970 EN4A be substituted with BS 970 (Part 1) 055M15?
BS 970 EN4A 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.