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ASTM A959 S18235 vs ASTM A240/A240M S44400

Close Alternative — 80.5% match based on chemical composition and mechanical property overlap.

ASTM A959 S18235 (ASTM A959:2011) and ASTM A240/A240M S44400 (ASTM A240/A240M:2025) are both steel grades. Both fall under the Stainless Steel category. ASTM A959 S18235 is typically used for wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1), while ASTM A240/A240M S44400 is commonly used for pressure vessels and general applications (plate, sheet and strip). ASTM A959 S18235 is defined under ASTM International, originating from United States, while ASTM A240/A240M S44400 is defined under ASTM International, originating from United States.

As per chemical composition, ASTM A959 S18235 vs ASTM A240/A240M S44400 is a 80.5% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a close alternative overall at 80.5%.

Frequently Compared With ASTM A959 S18235:
GB/T 3280 06Cr19Ni10 IS 1570 (Part 7) 12Cr12MoH GOST 5632 06Kh23N28 EN 10088-1 1.4006 EN 10088-1 1.4845 IS 1570 (Part 7) 12Cr12MoVH IS 1570 (Part 7) 12Cr12Ni2Mo EN 10088-1 1.4401 IS 1570 (Part 7) 11Cr17Ni13W3TiH ASTM A959 29-4C ASTM A959 .- EN 10088-1 1.4301
Match Breakdown
CHEMISTRY MATCH
80.5%
MECHANICAL MATCH
No shared data
OVERALL
80.5%
Specifications
Property ASTM A959 S18235 ASTM A240/A240M S44400
Standard ASTM A959:2011 ASTM A240/A240M:2025
Category Stainless Steel Stainless Steel
C (%) <=0.025 <=0.025
Cr (%) 17.5-18.5 17.5-19.5
Mn (%) <=0.50 <=1.00
Mo (%) 2.00-2.50 1.75-2.50
N (%) <=0.025 <=0.035
Ni (%) <=1.00 <=1.00
P (%) <=0.040 <=0.040
S (%) 0.15-0.35 <=0.030
Si (%) <=1.00 <=1.00
Ti (%) 0.030-1.00 Not specified
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property ASTM A959 S18235 ASTM A240/A240M S44400
Tensile Strength Not specified >=415 MPa
Yield Strength Not specified >=275 MPa
Elongation Not specified >=20%
Hardness Not specified <=217 HB
Condition Not specified Plate, sheet and strip; yield by 0.2 percent offset
Typical Applications
ASTM A959 S18235
Wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1)
ASTM A240/A240M S44400
Pressure vessels and general applications (plate, sheet and strip)
Key Differences
Can ASTM A959 S18235 Be Substituted With ASTM A240/A240M S44400?
ASTM A959 S18235 and ASTM A240/A240M S44400 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.
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ASTM A959 S18235
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ASTM A240/A240M S44400
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Frequently Asked Questions
What is the difference between ASTM A959 S18235 and ASTM A240/A240M S44400?
ASTM A959 S18235 specifies Ti which is not specified for ASTM A240/A240M S44400.
Can ASTM A959 S18235 be substituted with ASTM A240/A240M S44400?
ASTM A959 S18235 and ASTM A240/A240M S44400 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.