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ASTM A240/A240M S34751 vs BS 970 (Part 3) 304S11

Close Alternative — 82.6% match based on chemical composition and mechanical property overlap.

ASTM A240/A240M S34751 (ASTM A240/A240M:2025) and BS 970 (Part 3) 304S11 (BS 970 (Part 3):1991) are both steel grades. Both fall under the Stainless Steel category. ASTM A240/A240M S34751 is typically used for pressure vessels and general applications (plate, sheet and strip), while BS 970 (Part 3) 304S11 is commonly used for bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; austenitic stainless and heat resisting steel (table 18). ASTM A240/A240M S34751 is defined under ASTM International, originating from United States, while BS 970 (Part 3) 304S11 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, ASTM A240/A240M S34751 vs BS 970 (Part 3) 304S11 is a 82.6% 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 82.6%.

Frequently Compared With ASTM A240/A240M S34751:
EN 10088-1 1.4845 GOST 5632 08X18H10 EN 10088-1 1.4301 IS 1570 (Part 7) 12Cr12MoVH EN 10088-1 1.4006 EN 10088-1 1.4401 IS 1570 (Part 7) 11Cr17Ni13W3TiH IS 1570 (Part 7) 12Cr12MoH IS 1570 (Part 7) 12Cr12Ni2Mo ASTM A959 .- GB/T 3280 06Cr19Ni10 GOST 5632 06Kh23N28
Match Breakdown
CHEMISTRY MATCH
82.6%
MECHANICAL MATCH
No shared data
OVERALL
82.6%
Specifications
Property ASTM A240/A240M S34751 BS 970 (Part 3) 304S11
Standard ASTM A240/A240M:2025 BS 970 (Part 3):1991
Category Stainless Steel Stainless Steel
C (%) 0.005-0.020 <=0.030
Mn (%) <=2.00 <=2.0
P (%) <=0.045 <=0.045
S (%) <=0.030 <=0.030
Si (%) <=1.00 <=1.0
Cr (%) 17.0-19.0 17.0-19.0
Ni (%) 9.0-13.0 9.0-12.0
N (%) 0.06-0.10 Not specified
Nb (%) 0.20-0.50 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 A240/A240M S34751 BS 970 (Part 3) 304S11
Tensile Strength >=515 MPa Not specified
Yield Strength >=205 MPa Not specified
Elongation >=40% Not specified
Hardness <=201 HB Not specified
Condition Plate, sheet and strip; yield by 0.2 percent offset Not specified
Typical Applications
ASTM A240/A240M S34751
Pressure vessels and general applications (plate, sheet and strip)
BS 970 (Part 3) 304S11
Bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; austenitic stainless and heat resisting steel (Table 18)
Key Differences
Can ASTM A240/A240M S34751 Be Substituted With BS 970 (Part 3) 304S11?
ASTM A240/A240M S34751 and BS 970 (Part 3) 304S11 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 A240/A240M S34751
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BS 970 (Part 3) 304S11
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Frequently Asked Questions
What is the difference between ASTM A240/A240M S34751 and BS 970 (Part 3) 304S11?
ASTM A240/A240M S34751 specifies N, Nb which are not specified for BS 970 (Part 3) 304S11.
Can ASTM A240/A240M S34751 be substituted with BS 970 (Part 3) 304S11?
ASTM A240/A240M S34751 and BS 970 (Part 3) 304S11 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.