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BS 970 EN5K vs BS 970 (Part 1) 055M15

Related Material — 65.2% match based on chemical composition and mechanical property overlap.

BS 970 EN5K (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 EN5K is typically used for bars and billets for forging; forgings and drop-forgings; bars for machining; bright bars (excluding cold drawn bars). en 5k is intended for special applications only. same tensile ranges as en 5., while BS 970 (Part 1) 055M15 is commonly used for as-rolled, or as-rolled and softened, steel (section two). BS 970 EN5K 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 EN5K vs BS 970 (Part 1) 055M15 is a 81.1% match. As per mechanical properties, the match is 33.3%. Combined, this makes them a related material overall at 65.2%.

Frequently Compared With BS 970 EN5K:
BS 970 (Part 3) 045M10 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) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 060A40 BS 970 (Part 1) 045A10 BS 970 (Part 1) 060A45
Match Breakdown
CHEMISTRY MATCH
81.1%
MECHANICAL MATCH
33.3%
OVERALL
65.2%
Specifications
Property BS 970 EN5K BS 970 (Part 1) 055M15
Standard BS 970:1955 BS 970 (Part 1):1991
Category Carbon Steel Carbon Steel
C (%) 0.25-0.35 <=0.20
Si (%) 0.05-0.35 Not specified
Mn (%) 0.60-1.00 <=0.80
S (%) <=0.050 Not specified
P (%) <=0.050 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 EN5K BS 970 (Part 1) 055M15
Tensile Strength ≥494 MPa (32 tons/sq in, converted) 310 MPa min
Yield Strength ≥247 MPa (16 tons/sq in, converted) Not specified
Elongation ≥25% 25 % min
Hardness 143-193 HB 121 HB min
Condition Normalised, ruling section 2 1/2 in (lowest-strength condition of the standard) As-rolled
Typical Applications
BS 970 EN5K
Bars and billets for forging; forgings and drop-forgings; bars for machining; bright bars (excluding cold drawn bars). En 5K is intended for special applications only. Same tensile ranges as En 5.
BS 970 (Part 1) 055M15
As-rolled, or as-rolled and softened, steel (section two)
Key Differences
Can BS 970 EN5K Be Substituted With BS 970 (Part 1) 055M15?
BS 970 EN5K 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 EN5K
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BS 970 (Part 1) 055M15
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Frequently Asked Questions
What is the difference between BS 970 EN5K and BS 970 (Part 1) 055M15?
BS 970 EN5K specifies Si, S, P which are not specified for BS 970 (Part 1) 055M15.
Can BS 970 EN5K be substituted with BS 970 (Part 1) 055M15?
BS 970 EN5K 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.