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ASTM A240/A240M S31050 vs ASTM A959 S32950

Related Material — 69.9% match based on chemical composition and mechanical property overlap.

ASTM A240/A240M S31050 (ASTM A240/A240M:2025) and ASTM A959 S32950 (ASTM A959:2011) are both steel grades. Both fall under the Stainless Steel category. ASTM A240/A240M S31050 is typically used for pressure vessels and general applications (plate, sheet and strip), while ASTM A959 S32950 is commonly used for wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1). ASTM A240/A240M S31050 is defined under ASTM International, originating from United States, while ASTM A959 S32950 is defined under ASTM International, originating from United States.

As per chemical composition, ASTM A240/A240M S31050 vs ASTM A959 S32950 is a 70% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a related material overall at 69.9%.

Frequently Compared With ASTM A240/A240M S31050:
EN 10088-1 1.4301 EN 10088-1 1.4401 EN 10088-1 1.4845 GOST 5632 08X18H10 EN 10088-1 1.4006 IS 1570 (Part 7) 12Cr12MoH IS 1570 (Part 7) 12Cr12MoVH IS 1570 (Part 7) 12Cr12Ni2Mo GOST 5632 06Kh23N28 IS 1570 (Part 7) 11Cr17Ni13W3TiH ASTM A959 .- GB/T 3280 06Cr19Ni10
Match Breakdown
CHEMISTRY MATCH
70%
MECHANICAL MATCH
No shared data
OVERALL
69.9%
Specifications
Property ASTM A240/A240M S31050 ASTM A959 S32950
Standard ASTM A240/A240M:2025 ASTM A959:2011
Category Stainless Steel Stainless Steel
C (%) <=0.020 <=0.030
Mn (%) <=2.00 <=2.00
P (%) <=0.030 <=0.035
S (%) <=0.010 <=0.010
Si (%) <=0.50 <=0.60
Cr (%) 24.0-26.0 26.0-29.0
Ni (%) 20.5-23.5 3.5-5.2
Mo (%) 1.60-2.60 1.00-2.50
N (%) 0.09-0.15 0.15-0.35
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 S31050 ASTM A959 S32950
Tensile Strength >=580 MPa Not specified
Yield Strength >=270 MPa Not specified
Elongation >=25% Not specified
Hardness <=217 HB Not specified
Condition t <= 0.25 in. (first condition printed); yield by 0.2 percent offset Not specified
Typical Applications
ASTM A240/A240M S31050
Pressure vessels and general applications (plate, sheet and strip)
ASTM A959 S32950
Wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1)
Can ASTM A240/A240M S31050 Be Substituted With ASTM A959 S32950?
ASTM A240/A240M S31050 and ASTM A959 S32950 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.
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ASTM A240/A240M S31050
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ASTM A959 S32950
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Frequently Asked Questions
What is the difference between ASTM A240/A240M S31050 and ASTM A959 S32950?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can ASTM A240/A240M S31050 be substituted with ASTM A959 S32950?
ASTM A240/A240M S31050 and ASTM A959 S32950 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.