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BS 970 EN5D vs BS 970 (Part 1) 040A04

Related Material — 69.9% match based on chemical composition and mechanical property overlap.

BS 970 EN5D (BS 970:1955) and BS 970 (Part 1) 040A04 (BS 970 (Part 1):1991) are both steel grades. Both fall under the Carbon Steel category. BS 970 EN5D is typically used for bars for machining, while BS 970 (Part 1) 040A04 is commonly used for as-rolled, or as-rolled and softened, steel (section two). BS 970 EN5D is defined under British Standards (BS), originating from United Kingdom, while BS 970 (Part 1) 040A04 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, BS 970 EN5D vs BS 970 (Part 1) 040A04 is a 79% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a related material overall at 69.9%.

Frequently Compared With BS 970 EN5D:
BS 970 (Part 1) 040A12 BS 970 (Part 1) 045M10 BS 970 (Part 1) 045A10 BS 970 (Part 3) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 3) 045M10 BS 970 (Part 1) 040A10 BS 970 (Part 1) 045A10 BS 970 (Part 1) 055M15 BS 970 (Part 1) 060A32 BS 970 (Part 1) 060A40 BS 970 (Part 1) 060A45
Match Breakdown
CHEMISTRY MATCH
79%
MECHANICAL MATCH
No shared data
OVERALL
69.9%
Specifications
Property BS 970 EN5D BS 970 (Part 1) 040A04
Standard BS 970:1955 BS 970 (Part 1):1991
Category Carbon Steel Carbon Steel
C (%) 0.25-0.35 <=0.08
Si (%) 0.05-0.35 Not specified
Mn (%) 0.60-1.00 0.30-0.50
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 EN5D BS 970 (Part 1) 040A04
Tensile Strength ≥541 MPa (35 tons/sq in, converted) Not specified
Elongation ≥15% Not specified
Hardness ≤229 HB Not specified
Condition size (diameter or width across flats) Over 3/4 to 1 1/2 in (lowest-strength condition of the standard) Not specified
Typical Applications
BS 970 EN5D
Bars for machining
BS 970 (Part 1) 040A04
As-rolled, or as-rolled and softened, steel (section two)
Key Differences
Can BS 970 EN5D Be Substituted With BS 970 (Part 1) 040A04?
BS 970 EN5D and BS 970 (Part 1) 040A04 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 EN5D
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BS 970 (Part 1) 040A04
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Frequently Asked Questions
What is the difference between BS 970 EN5D and BS 970 (Part 1) 040A04?
BS 970 EN5D specifies Si, S, P which are not specified for BS 970 (Part 1) 040A04.
Can BS 970 EN5D be substituted with BS 970 (Part 1) 040A04?
BS 970 EN5D and BS 970 (Part 1) 040A04 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.