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ASTM A959 XM-31 vs ASTM A240/A240M S21400

Strong Match — 100% match based on chemical composition and mechanical property overlap.

ASTM A959 XM-31 (ASTM A959:2011) and ASTM A240/A240M S21400 (ASTM A240/A240M:2025) are both steel grades. Both fall under the Stainless Steel category. ASTM A959 XM-31 is typically used for wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1), while ASTM A240/A240M S21400 is commonly used for pressure vessels and general applications (plate, sheet and strip). ASTM A959 XM-31 is defined under ASTM International, originating from United States, while ASTM A240/A240M S21400 is defined under ASTM International, originating from United States.

As per chemical composition, ASTM A959 XM-31 vs ASTM A240/A240M S21400 is a 100% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a strong match overall at 100%.

Frequently Compared With ASTM A959 XM-31:
IS 1570 (Part 7) 12Cr12MoVH GB/T 3280 06Cr19Ni10 EN 10088-1 1.4006 GOST 5632 06Kh23N28 EN 10088-1 1.4845 IS 1570 (Part 7) 11Cr17Ni13W3TiH IS 1570 (Part 7) 12Cr12MoH ASTM A959 .- GOST 5632 08X18H10 EN 10088-1 1.4301 EN 10088-1 1.4401 IS 1570 (Part 7) 12Cr12Ni2Mo
Match Breakdown
CHEMISTRY MATCH
100%
MECHANICAL MATCH
No shared data
OVERALL
100%
Specifications
Property ASTM A959 XM-31 ASTM A240/A240M S21400
Standard ASTM A959:2011 ASTM A240/A240M:2025
Category Stainless Steel Stainless Steel
C (%) <=0.12 <=0.12
Cr (%) 17.0-18.5 17.0-18.5
Mn (%) 14.0-16.0 14.00-16.00
N (%) >=0.35 >=0.35
Ni (%) <=1.00 <=1.00
P (%) <=0.045 <=0.045
S (%) <=0.030 <=0.030
Si (%) 0.30-1.00 0.30-1.00
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Typical Applications
ASTM A959 XM-31
Wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1)
ASTM A240/A240M S21400
Pressure vessels and general applications (plate, sheet and strip)
Can ASTM A959 XM-31 Be Substituted With ASTM A240/A240M S21400?
ASTM A959 XM-31 and ASTM A240/A240M S21400 overlap closely enough on chemistry and mechanical properties that ASTM A240/A240M S21400 is often considered as a substitute for ASTM A959 XM-31 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
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ASTM A959 XM-31
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ASTM A240/A240M S21400
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Frequently Asked Questions
What is the difference between ASTM A959 XM-31 and ASTM A240/A240M S21400?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can ASTM A959 XM-31 be substituted with ASTM A240/A240M S21400?
ASTM A959 XM-31 and ASTM A240/A240M S21400 overlap closely enough on chemistry and mechanical properties that ASTM A240/A240M S21400 is often considered as a substitute for ASTM A959 XM-31 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.