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ASTM A959 26-3-3 vs ASTM A240/A240M S32550

Close Alternative — 73.7% match based on chemical composition and mechanical property overlap.

ASTM A959 26-3-3 (ASTM A959:2011) and ASTM A240/A240M S32550 (ASTM A240/A240M:2025) are both steel grades. Both fall under the Stainless Steel category. ASTM A959 26-3-3 is typically used for wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1), while ASTM A240/A240M S32550 is commonly used for pressure vessels and general applications (plate, sheet and strip). ASTM A959 26-3-3 is defined under ASTM International, originating from United States, while ASTM A240/A240M S32550 is defined under ASTM International, originating from United States.

As per chemical composition, ASTM A959 26-3-3 vs ASTM A240/A240M S32550 is a 73.7% 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 73.7%.

Frequently Compared With ASTM A959 26-3-3:
ASTM A959 255 ASTM A959 29-4C ASTM A959 25-4-4 ASTM A959 29-4-2 GOST 5632 06Kh23N28 GOST 5632 08X18H10 GB/T 3280 06Cr19Ni10 EN 10088-1 1.4845 IS 1570 (Part 7) 12Cr12MoH EN 10088-1 1.4006 EN 10088-1 1.4401 IS 1570 (Part 7) 11Cr17Ni13W3TiH
Match Breakdown
CHEMISTRY MATCH
73.7%
MECHANICAL MATCH
No shared data
OVERALL
73.7%
Specifications
Property ASTM A959 26-3-3 ASTM A240/A240M S32550
Standard ASTM A959:2011 ASTM A240/A240M:2025
Category Stainless Steel Stainless Steel
C (%) <=0.030 <=0.04
Cr (%) 25.0-28.0 24.0-27.0
Mn (%) <=1.00 <=1.50
Mo (%) 3.0-4.0 2.9-3.9
N (%) <=0.040 0.10-0.25
Ni (%) 1.0-3.5 4.5-6.5
P (%) <=0.040 <=0.040
S (%) <=0.030 <=0.030
Si (%) <=1.00 <=1.00
Cu (%) Not specified 1.50-2.50
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property ASTM A959 26-3-3 ASTM A240/A240M S32550
Tensile Strength Not specified >=760 MPa
Yield Strength Not specified >=550 MPa
Elongation Not specified >=15%
Hardness Not specified <=302 HB
Condition Not specified Plate, sheet and strip; yield by 0.2 percent offset
Typical Applications
ASTM A959 26-3-3
Wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1)
ASTM A240/A240M S32550
Pressure vessels and general applications (plate, sheet and strip)
Key Differences
Can ASTM A959 26-3-3 Be Substituted With ASTM A240/A240M S32550?
ASTM A959 26-3-3 and ASTM A240/A240M S32550 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 A959 26-3-3
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ASTM A240/A240M S32550
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Frequently Asked Questions
What is the difference between ASTM A959 26-3-3 and ASTM A240/A240M S32550?
ASTM A240/A240M S32550 specifies Cu which is not specified for ASTM A959 26-3-3.
Can ASTM A959 26-3-3 be substituted with ASTM A240/A240M S32550?
ASTM A959 26-3-3 and ASTM A240/A240M S32550 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.