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ASTM A240/A240M S44400 vs ASTM A959 S18235

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

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

As per chemical composition, ASTM A240/A240M S44400 vs ASTM A959 S18235 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 A240/A240M S44400:
EN 10088-1 1.4401 EN 10088-1 1.4006 EN 10088-1 1.4845 GOST 5632 08X18H10 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 .- GOST 5632 06Kh23N28 GB/T 3280 06Cr19Ni10
Match Breakdown
CHEMISTRY MATCH
80.5%
MECHANICAL MATCH
No shared data
OVERALL
80.5%
Specifications
Property ASTM A240/A240M S44400 ASTM A959 S18235
Standard ASTM A240/A240M:2025 ASTM A959:2011
Category Stainless Steel Stainless Steel
C (%) <=0.025 <=0.025
Mn (%) <=1.00 <=0.50
P (%) <=0.040 <=0.040
S (%) <=0.030 0.15-0.35
Si (%) <=1.00 <=1.00
Cr (%) 17.5-19.5 17.5-18.5
Ni (%) <=1.00 <=1.00
Mo (%) 1.75-2.50 2.00-2.50
N (%) <=0.035 <=0.025
Ti (%) Not specified 0.030-1.00
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 S44400 ASTM A959 S18235
Tensile Strength >=415 MPa Not specified
Yield Strength >=275 MPa Not specified
Elongation >=20% Not specified
Hardness <=217 HB Not specified
Condition Plate, sheet and strip; yield by 0.2 percent offset Not specified
Typical Applications
ASTM A240/A240M S44400
Pressure vessels and general applications (plate, sheet and strip)
ASTM A959 S18235
Wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1)
Key Differences
Can ASTM A240/A240M S44400 Be Substituted With ASTM A959 S18235?
ASTM A240/A240M S44400 and ASTM A959 S18235 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 A240/A240M S44400
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ASTM A959 S18235
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Frequently Asked Questions
What is the difference between ASTM A240/A240M S44400 and ASTM A959 S18235?
ASTM A959 S18235 specifies Ti which is not specified for ASTM A240/A240M S44400.
Can ASTM A240/A240M S44400 be substituted with ASTM A959 S18235?
ASTM A240/A240M S44400 and ASTM A959 S18235 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.