Post Stock Login Register

ASTM A240/A240M S20431 vs ASTM A959 201

Close Alternative — 79.1% match based on chemical composition and mechanical property overlap.

ASTM A240/A240M S20431 (ASTM A240/A240M:2025) and ASTM A959 201 (ASTM A959:2011) are both steel grades. Both fall under the Stainless Steel category. ASTM A240/A240M S20431 is typically used for pressure vessels and general applications (plate, sheet and strip), while ASTM A959 201 is commonly used for wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1). ASTM A240/A240M S20431 is defined under ASTM International, originating from United States, while ASTM A959 201 is defined under ASTM International, originating from United States.

As per chemical composition, ASTM A240/A240M S20431 vs ASTM A959 201 is a 79.1% 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 79.1%.

Frequently Compared With ASTM A240/A240M S20431:
EN 10088-1 1.4006 EN 10088-1 1.4401 IS 1570 (Part 7) 12Cr12MoH IS 1570 (Part 7) 12Cr12Ni2Mo EN 10088-1 1.4301 GOST 5632 08X18H10 EN 10088-1 1.4845 IS 1570 (Part 7) 11Cr17Ni13W3TiH ASTM A959 .- GB/T 3280 06Cr19Ni10 GOST 5632 06Kh23N28 IS 1570 (Part 7) 12Cr12MoVH
Match Breakdown
CHEMISTRY MATCH
79.1%
MECHANICAL MATCH
No shared data
OVERALL
79.1%
Specifications
Property ASTM A240/A240M S20431 ASTM A959 201
Standard ASTM A240/A240M:2025 ASTM A959:2011
Category Stainless Steel Stainless Steel
C (%) <=0.12 <=0.15
Mn (%) 5.00-7.00 5.5-7.5
P (%) <=0.045 <=0.060
S (%) <=0.030 <=0.030
Si (%) <=1.00 <=1.00
Cr (%) 17.0-18.0 16.0-18.0
Ni (%) 2.0-4.0 3.5-5.5
N (%) 0.10-0.25 <=0.25
Cu (%) 1.50-3.50 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 S20431 ASTM A959 201
Tensile Strength >=620 MPa Not specified
Yield Strength >=310 MPa Not specified
Elongation >=40% Not specified
Hardness <=241 HB Not specified
Condition Plate, sheet and strip; yield by 0.2 percent offset Not specified
Typical Applications
ASTM A240/A240M S20431
Pressure vessels and general applications (plate, sheet and strip)
ASTM A959 201
Wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1)
Key Differences
Can ASTM A240/A240M S20431 Be Substituted With ASTM A959 201?
ASTM A240/A240M S20431 and ASTM A959 201 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.
On M-EX Right Now
ASTM A240/A240M S20431
0 active listings and RFQs →
ASTM A959 201
0 active listings and RFQs →
Frequently Asked Questions
What is the difference between ASTM A240/A240M S20431 and ASTM A959 201?
ASTM A240/A240M S20431 specifies Cu which is not specified for ASTM A959 201.
Can ASTM A240/A240M S20431 be substituted with ASTM A959 201?
ASTM A240/A240M S20431 and ASTM A959 201 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.