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BS 970 EN9K vs BS 970 (Part 1) 055M15

Minimal Match — 54.8% match based on chemical composition and mechanical property overlap.

BS 970 EN9K (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 EN9K 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 EN9K vs BS 970 (Part 1) 055M15 is a 82.1% match. As per mechanical properties, the match is 0%. Combined, this makes them a minimal match overall at 54.8%.

Frequently Compared With BS 970 EN9K:
BS 970 (Part 1) 040A12 BS 970 (Part 1) 045M10 BS 970 (Part 1) 070M55 BS 970 (Part 1) 045A10 BS 970 (Part 3) 045M10 BS 970 (Part 3) 070M55 BS 970 (Part 1) 040A04 BS 970 (Part 1) 040A10 BS 970 (Part 3) 045A10 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 060A32
Match Breakdown
CHEMISTRY MATCH
82.1%
MECHANICAL MATCH
0%
OVERALL
54.8%
Specifications
Property BS 970 EN9K BS 970 (Part 1) 055M15
Standard BS 970:1955 BS 970 (Part 1):1991
Category Carbon Steel Carbon Steel
C (%) 0.50-0.60 <=0.20
Si (%) 0.05-0.35 Not specified
Mn (%) 0.50-0.80 <=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 EN9K BS 970 (Part 1) 055M15
Tensile Strength ≥695 MPa (45 tons/sq in, converted) 310 MPa min
Yield Strength ≥355 MPa (23 tons/sq in, converted) Not specified
Elongation ≥18% 25 % min
Hardness 201-255 HB 121 HB min
Condition Normalised, ruling section 4 in (lowest-strength condition of the standard) As-rolled
Typical Applications
BS 970 EN9K
Not documented
BS 970 (Part 1) 055M15
As-rolled, or as-rolled and softened, steel (section two)
Key Differences
Can BS 970 EN9K Be Substituted With BS 970 (Part 1) 055M15?
BS 970 EN9K 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 EN9K
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BS 970 (Part 1) 055M15
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Frequently Asked Questions
What is the difference between BS 970 EN9K and BS 970 (Part 1) 055M15?
BS 970 EN9K specifies Si, S, P which are not specified for BS 970 (Part 1) 055M15.
Can BS 970 EN9K be substituted with BS 970 (Part 1) 055M15?
BS 970 EN9K 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.