Post Stock Login Register

ASTM A240/A240M S21400 vs ASTM A959 XM-31

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

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

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