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ASTM A240/A240M S44537 vs ASTM A959 S40945

Related Material — 67.7% match based on chemical composition and mechanical property overlap.

ASTM A240/A240M S44537 (ASTM A240/A240M:2025) and ASTM A959 S40945 (ASTM A959:2011) are both steel grades. Both fall under the Stainless Steel category. ASTM A240/A240M S44537 is typically used for pressure vessels and general applications (plate, sheet and strip), while ASTM A959 S40945 is commonly used for wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1). ASTM A240/A240M S44537 is defined under ASTM International, originating from United States, while ASTM A959 S40945 is defined under ASTM International, originating from United States.

As per chemical composition, ASTM A240/A240M S44537 vs ASTM A959 S40945 is a 67.7% 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 67.7%.

Frequently Compared With ASTM A240/A240M S44537:
ASTM A959 .- EN 10088-1 1.4006 EN 10088-1 1.4301 EN 10088-1 1.4401 EN 10088-1 1.4845 IS 1570 (Part 7) 12Cr12MoH IS 1570 (Part 7) 12Cr12MoVH IS 1570 (Part 7) 12Cr13H GB/T 3280 06Cr19Ni10 GOST 5632 06Kh23N28 GOST 5632 08X18H10 IS 1570 (Part 7) 12Cr12Ni2Mo
Match Breakdown
CHEMISTRY MATCH
67.7%
MECHANICAL MATCH
No shared data
OVERALL
67.7%
Specifications
Property ASTM A240/A240M S44537 ASTM A959 S40945
Standard ASTM A240/A240M:2025 ASTM A959:2011
Category Stainless Steel Stainless Steel
C (%) <=0.030 <=0.030
Mn (%) <=0.8 <=1.00
P (%) <=0.050 <=0.040
S (%) <=0.006 <=0.030
Si (%) 0.1-0.6 <=1.00
Cr (%) 20.0-24.0 10.5-11.7
Ni (%) <=0.5 <=0.50
N (%) <=0.04 <=0.030
Cu (%) <=0.5 Not specified
Al (%) <=0.1 Not specified
W (%) 1.0-3.0 Not specified
Nb (%) 0.2-1.0 Not specified
Ti (%) 0.02-0.20 0.05-0.20
La (%) 0.04-0.20 Not specified
Cb (%) Not specified 0.18-0.40
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 S44537 ASTM A959 S40945
Tensile Strength >=450 MPa Not specified
Yield Strength >=320 MPa Not specified
Elongation >=18% Not specified
Hardness <=200 HB Not specified
Condition Plate, sheet and strip; yield by 0.2 percent offset Not specified
Typical Applications
ASTM A240/A240M S44537
Pressure vessels and general applications (plate, sheet and strip)
ASTM A959 S40945
Wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1)
Key Differences
Can ASTM A240/A240M S44537 Be Substituted With ASTM A959 S40945?
ASTM A240/A240M S44537 and ASTM A959 S40945 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 S44537
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ASTM A959 S40945
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Frequently Asked Questions
What is the difference between ASTM A240/A240M S44537 and ASTM A959 S40945?
ASTM A240/A240M S44537 specifies Cu, Al, W, Nb which are not specified for ASTM A959 S40945. ASTM A959 S40945 specifies Cb which is not specified for ASTM A240/A240M S44537.
Can ASTM A240/A240M S44537 be substituted with ASTM A959 S40945?
ASTM A240/A240M S44537 and ASTM A959 S40945 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.