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ASTM A240/A240M S31254 vs ASTM A959 .-

Minimal Match — 35% match based on chemical composition and mechanical property overlap.

ASTM A240/A240M S31254 (ASTM A240/A240M:2025) and ASTM A959 .- (ASTM A959:2011) are both steel grades. Both fall under the Stainless Steel category. ASTM A240/A240M S31254 is typically used for pressure vessels and general applications (plate, sheet and strip), while ASTM A959 .- is commonly used for wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1). ASTM A240/A240M S31254 is defined under ASTM International, originating from United States, while ASTM A959 .- is defined under ASTM International, originating from United States.

As per chemical composition, ASTM A240/A240M S31254 vs ASTM A959 .- is a 56.3% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With ASTM A240/A240M S31254:
EN 10088-1 1.4845 IS 1570 (Part 7) 12Cr12MoH GOST 5632 06Kh23N28 GOST 5632 08X18H10 EN 10088-1 1.4401 IS 1570 (Part 7) 12Cr12MoVH GB/T 3280 06Cr19Ni10 EN 10088-1 1.4006 EN 10088-1 1.4301 IS 1570 (Part 7) 11Cr17Ni13W3TiH IS 1570 (Part 7) 12Cr12Ni2Mo IS 1570 (Part 7) 12Cr13H
Match Breakdown
CHEMISTRY MATCH
56.3%
MECHANICAL MATCH
No shared data
OVERALL
35%
Specifications
Property ASTM A240/A240M S31254 ASTM A959 .-
Standard ASTM A240/A240M:2025 ASTM A959:2011
Category Stainless Steel Stainless Steel
C (%) <=0.020 <=0.030
Mn (%) <=1.00 <=1.00
P (%) <=0.030 <=0.040
S (%) <=0.010 <=0.030
Si (%) <=0.80 <=1.00
Cr (%) 19.5-20.5 18.0-20.0
Ni (%) 17.5-18.5 <=0.50
Mo (%) 6.0-6.5 Not specified
N (%) 0.18-0.25 <=0.030
Cu (%) 0.50-1.00 Not specified
Cb (%) Not specified 0.10-0.60
Ti (%) Not specified 0.07-0.30
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 S31254 ASTM A959 .-
Tensile Strength >=690 MPa Not specified
Yield Strength >=310 MPa Not specified
Elongation >=35% Not specified
Hardness <=223 HB Not specified
Condition Sheet and strip (first condition printed); yield by 0.2 percent offset Not specified
Typical Applications
ASTM A240/A240M S31254
Pressure vessels and general applications (plate, sheet and strip)
ASTM A959 .-
Wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1)
Key Differences
Can ASTM A240/A240M S31254 Be Substituted With ASTM A959 .-?
ASTM A240/A240M S31254 and ASTM A959 .- 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 S31254
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ASTM A959 .-
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Frequently Asked Questions
What is the difference between ASTM A240/A240M S31254 and ASTM A959 .-?
ASTM A240/A240M S31254 specifies Mo, Cu which are not specified for ASTM A959 .-. ASTM A959 .- specifies Cb, Ti which are not specified for ASTM A240/A240M S31254.
Can ASTM A240/A240M S31254 be substituted with ASTM A959 .-?
ASTM A240/A240M S31254 and ASTM A959 .- 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.