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BS 970 EN6K vs BS 970 (Part 1) 040A04

Close Alternative — 81.7% match based on chemical composition and mechanical property overlap.

BS 970 EN6K (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 EN6K is typically used for bars for machining. en 6k is intended for special applications only., while BS 970 (Part 1) 040A04 is commonly used for as-rolled, or as-rolled and softened, steel (section two). BS 970 EN6K 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 EN6K vs BS 970 (Part 1) 040A04 is a 81.7% 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 81.7%.

Frequently Compared With BS 970 EN6K:
BS 970 (Part 3) 070M20 BS 970 (Part 3) 045A10 BS 970 (Part 1) 040A12 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 060A32 BS 970 (Part 1) 040A10 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 060A40 BS 970 (Part 3) 045M10 BS 970 (Part 1) 055M15
Match Breakdown
CHEMISTRY MATCH
81.7%
MECHANICAL MATCH
No shared data
OVERALL
81.7%
Specifications
Property BS 970 EN6K BS 970 (Part 1) 040A04
Standard BS 970:1955 BS 970 (Part 1):1991
Category Carbon Steel Carbon Steel
C (%) <=0.40 <=0.08
Si (%) 0.05-0.35 Not specified
Mn (%) 0.50-0.90 0.30-0.50
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 EN6K BS 970 (Part 1) 040A04
Tensile Strength 494-695 MPa (32-45 tons/sq in, converted) Not specified
Elongation ≥15% Not specified
Condition size (diameter or width across flats) Over 2 1/2 in (lowest-strength condition of the standard) Not specified
Typical Applications
BS 970 EN6K
Bars for machining. En 6K is intended for special applications only.
BS 970 (Part 1) 040A04
As-rolled, or as-rolled and softened, steel (section two)
Key Differences
Can BS 970 EN6K Be Substituted With BS 970 (Part 1) 040A04?
BS 970 EN6K 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 EN6K
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BS 970 (Part 1) 040A04
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Frequently Asked Questions
What is the difference between BS 970 EN6K and BS 970 (Part 1) 040A04?
BS 970 EN6K specifies Si, S, P which are not specified for BS 970 (Part 1) 040A04.
Can BS 970 EN6K be substituted with BS 970 (Part 1) 040A04?
BS 970 EN6K 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.