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BS 970 EN4A vs BS 970 (Part 1) 040A04

Close Alternative — 82.5% match based on chemical composition and mechanical property overlap.

BS 970 EN4A (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 EN4A is typically used for bright bars for machining. (as altered feb. 1955), while BS 970 (Part 1) 040A04 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) 040A04 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, BS 970 EN4A vs BS 970 (Part 1) 040A04 is a 82.5% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a close alternative overall at 82.5%.

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 1) 045M10 BS 970 (Part 3) 045M10 BS 970 (Part 1) 060A32 BS 970 (Part 1) 060A40 BS 970 (Part 1) 040A12 BS 970 (Part 1) 045A10 BS 970 (Part 1) 055M15
Match Breakdown
CHEMISTRY MATCH
82.5%
MECHANICAL MATCH
No shared data
OVERALL
82.5%
Specifications
Property BS 970 EN4A BS 970 (Part 1) 040A04
Standard BS 970:1955 BS 970 (Part 1):1991
Category Carbon Steel Carbon Steel
C (%) <=0.30 <=0.08
Si (%) 0.05-0.35 Not specified
Mn (%) <=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 EN4A BS 970 (Part 1) 040A04
Tensile Strength 494-649 MPa (32-42 tons/sq in, converted) Not specified
Elongation ≥12% Not specified
Condition , ruling section 2 in (lowest-strength condition of the standard) Not specified
Typical Applications
BS 970 EN4A
Bright bars for machining. (As altered Feb. 1955)
BS 970 (Part 1) 040A04
As-rolled, or as-rolled and softened, steel (section two)
Key Differences
Can BS 970 EN4A Be Substituted With BS 970 (Part 1) 040A04?
BS 970 EN4A and BS 970 (Part 1) 040A04 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.
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BS 970 EN4A
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BS 970 (Part 1) 040A04
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Frequently Asked Questions
What is the difference between BS 970 EN4A and BS 970 (Part 1) 040A04?
BS 970 EN4A specifies Si, S, P which are not specified for BS 970 (Part 1) 040A04.
Can BS 970 EN4A be substituted with BS 970 (Part 1) 040A04?
BS 970 EN4A and BS 970 (Part 1) 040A04 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.