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ASTM A516/A516M Grade 65 vs BS 970 (Part 1) 040A12

Close Alternative — 78.9% match based on chemical composition and mechanical property overlap.

ASTM A516/A516M Grade 65 (ASTM A516/A516M:2025) and BS 970 (Part 1) 040A12 (BS 970 (Part 1):1991) are both steel grades. Both fall under the Carbon Steel category. ASTM A516/A516M Grade 65 is typically used for welded pressure vessels where improved notch toughness is important, while BS 970 (Part 1) 040A12 is commonly used for as-rolled, or as-rolled and softened, steel (section two). ASTM A516/A516M Grade 65 is defined under ASTM International, originating from United States, while BS 970 (Part 1) 040A12 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, ASTM A516/A516M Grade 65 vs BS 970 (Part 1) 040A12 is a 78.9% 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 78.9%.

Frequently Compared With ASTM A516/A516M Grade 65:
BS 970 (Part 1) 045A10 BS 970 (Part 1) 045A10 BS 970 (Part 3) 070M20 BS 970 (Part 3) 080A15 BS 970 (Part 1) 040A04 BS 970 (Part 1) 040A10 BS 970 (Part 3) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 045M10 BS 970 (Part 3) 045M10 BS 970 (Part 1) 055M15 BS 970 (Part 1) 060A32
Match Breakdown
CHEMISTRY MATCH
78.9%
MECHANICAL MATCH
No shared data
OVERALL
78.9%
Specifications
Property ASTM A516/A516M Grade 65 BS 970 (Part 1) 040A12
Standard ASTM A516/A516M:2025 BS 970 (Part 1):1991
Category Carbon Steel Carbon Steel
C (%) <=0.24 0.10-0.15
Mn (%) 0.85-1.20 0.30-0.50
P (%) <=0.025 Not specified
S (%) <=0.025 Not specified
Si (%) 0.15-0.40 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 ASTM A516/A516M Grade 65 BS 970 (Part 1) 040A12
Tensile Strength 450-585 MPa Not specified
Yield Strength >=240 MPa Not specified
Elongation >=19% Not specified
Condition Tension test per Table 2; one set of values for all thicknesses; plates 40 mm and under normally as-rolled, over 40 mm normalized; Elongation is in 200 mm gauge length, 50 mm values in the tensile block Not specified
Typical Applications
ASTM A516/A516M Grade 65
Welded pressure vessels where improved notch toughness is important
BS 970 (Part 1) 040A12
As-rolled, or as-rolled and softened, steel (section two)
Key Differences
Can ASTM A516/A516M Grade 65 Be Substituted With BS 970 (Part 1) 040A12?
ASTM A516/A516M Grade 65 and BS 970 (Part 1) 040A12 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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ASTM A516/A516M Grade 65
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BS 970 (Part 1) 040A12
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Frequently Asked Questions
What is the difference between ASTM A516/A516M Grade 65 and BS 970 (Part 1) 040A12?
ASTM A516/A516M Grade 65 specifies P, S, Si which are not specified for BS 970 (Part 1) 040A12.
Can ASTM A516/A516M Grade 65 be substituted with BS 970 (Part 1) 040A12?
ASTM A516/A516M Grade 65 and BS 970 (Part 1) 040A12 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.