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ASTM A240/A240M S82121 vs ASTM A959 2304

Close Alternative — 71.7% match based on chemical composition and mechanical property overlap.

ASTM A240/A240M S82121 (ASTM A240/A240M:2025) and ASTM A959 2304 (ASTM A959:2011) are both steel grades. Both fall under the Stainless Steel category. ASTM A240/A240M S82121 is typically used for pressure vessels and general applications (plate, sheet and strip), while ASTM A959 2304 is commonly used for wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1). ASTM A240/A240M S82121 is defined under ASTM International, originating from United States, while ASTM A959 2304 is defined under ASTM International, originating from United States.

As per chemical composition, ASTM A240/A240M S82121 vs ASTM A959 2304 is a 71.7% 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 71.7%.

Frequently Compared With ASTM A240/A240M S82121:
IS 1570 (Part 7) 12Cr12MoVH IS 1570 (Part 7) 12Cr12Ni2Mo GB/T 3280 06Cr19Ni10 GOST 5632 06Kh23N28 GOST 5632 08X18H10 EN 10088-1 1.4301 IS 1570 (Part 7) 11Cr17Ni13W3TiH IS 1570 (Part 7) 12Cr12MoH ASTM A959 .- EN 10088-1 1.4006 EN 10088-1 1.4401 EN 10088-1 1.4845
Match Breakdown
CHEMISTRY MATCH
71.7%
MECHANICAL MATCH
No shared data
OVERALL
71.7%
Specifications
Property ASTM A240/A240M S82121 ASTM A959 2304
Standard ASTM A240/A240M:2025 ASTM A959:2011
Category Stainless Steel Stainless Steel
C (%) <=0.035 <=0.030
Mn (%) 1.00-2.50 <=2.50
P (%) <=0.040 <=0.040
S (%) <=0.010 <=0.030
Si (%) <=1.00 <=1.00
Cr (%) 21.0-23.0 21.5-24.5
Ni (%) 2.0-4.0 3.0-5.5
Mo (%) 0.30-1.30 0.05-0.60
N (%) 0.15-0.25 0.05-0.20
Cu (%) 0.20-1.20 0.05-0.60
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 S82121 ASTM A959 2304
Tensile Strength >=650 MPa Not specified
Yield Strength >=450 MPa Not specified
Elongation >=25% Not specified
Hardness <=286 HB Not specified
Condition Plate, sheet and strip; yield by 0.2 percent offset Not specified
Typical Applications
ASTM A240/A240M S82121
Pressure vessels and general applications (plate, sheet and strip)
ASTM A959 2304
Wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1)
Can ASTM A240/A240M S82121 Be Substituted With ASTM A959 2304?
ASTM A240/A240M S82121 and ASTM A959 2304 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 S82121
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ASTM A959 2304
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Frequently Asked Questions
What is the difference between ASTM A240/A240M S82121 and ASTM A959 2304?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can ASTM A240/A240M S82121 be substituted with ASTM A959 2304?
ASTM A240/A240M S82121 and ASTM A959 2304 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.