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BS 970 EN4A vs BS 970 (Part 1) 045M10

Minimal Match — 55% match based on chemical composition and mechanical property overlap.

BS 970 EN4A (BS 970:1955) and BS 970 (Part 1) 045M10 (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) 045M10 is commonly used for case hardening steel (section four). BS 970 EN4A is defined under British Standards (BS), originating from United Kingdom, while BS 970 (Part 1) 045M10 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, BS 970 EN4A vs BS 970 (Part 1) 045M10 is a 82.5% match. As per mechanical properties, the match is 0%. Combined, this makes them a minimal match overall at 55%.

Frequently Compared With BS 970 EN4A:
BS 970 (Part 1) 045A10 BS 970 (Part 1) 040A10 BS 970 (Part 3) 070M20 BS 970 (Part 3) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 3) 045M10 BS 970 (Part 1) 060A32 BS 970 (Part 1) 060A40 BS 970 (Part 1) 040A04 BS 970 (Part 1) 040A12 BS 970 (Part 1) 045A10 BS 970 (Part 1) 055M15
Match Breakdown
CHEMISTRY MATCH
82.5%
MECHANICAL MATCH
0%
OVERALL
55%
Specifications
Property BS 970 EN4A BS 970 (Part 1) 045M10
Standard BS 970:1955 BS 970 (Part 1):1991
Category Carbon Steel Carbon Steel
C (%) <=0.30 0.07-0.13
Si (%) 0.05-0.35 Not specified
Mn (%) <=1.00 0.30-0.60
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) 045M10
Tensile Strength 494-649 MPa (32-42 tons/sq in, converted) 430 MPa min
Elongation ≥12% 18 % min
Condition , ruling section 2 in (lowest-strength condition of the standard) Case hardened, 19 mm test bar
Typical Applications
BS 970 EN4A
Bright bars for machining. (As altered Feb. 1955)
BS 970 (Part 1) 045M10
Case hardening steel (section four)
Key Differences
Can BS 970 EN4A Be Substituted With BS 970 (Part 1) 045M10?
BS 970 EN4A and BS 970 (Part 1) 045M10 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) 045M10
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Frequently Asked Questions
What is the difference between BS 970 EN4A and BS 970 (Part 1) 045M10?
BS 970 EN4A specifies Si, S, P which are not specified for BS 970 (Part 1) 045M10.
Can BS 970 EN4A be substituted with BS 970 (Part 1) 045M10?
BS 970 EN4A and BS 970 (Part 1) 045M10 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.