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ASTM A240/A240M S20400 vs ASTM A959 201LN

Close Alternative — 75.1% match based on chemical composition and mechanical property overlap.

ASTM A240/A240M S20400 (ASTM A240/A240M:2025) and ASTM A959 201LN (ASTM A959:2011) are both steel grades. Both fall under the Stainless Steel category. ASTM A240/A240M S20400 is typically used for pressure vessels and general applications (plate, sheet and strip), while ASTM A959 201LN is commonly used for wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1). ASTM A240/A240M S20400 is defined under ASTM International, originating from United States, while ASTM A959 201LN is defined under ASTM International, originating from United States.

As per chemical composition, ASTM A240/A240M S20400 vs ASTM A959 201LN is a 75.1% 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 75.1%.

Frequently Compared With ASTM A240/A240M S20400:
IS 1570 (Part 7) 12Cr12MoVH EN 10088-1 1.4006 EN 10088-1 1.4401 ASTM A959 .- GOST 5632 08X18H10 EN 10088-1 1.4301 EN 10088-1 1.4845 IS 1570 (Part 7) 12Cr12Ni2Mo ASTM A959 201L GOST 5632 06Kh23N28 IS 1570 (Part 7) 11Cr17Ni13W3TiH IS 1570 (Part 7) 12Cr12MoH
Match Breakdown
CHEMISTRY MATCH
75.1%
MECHANICAL MATCH
No shared data
OVERALL
75.1%
Specifications
Property ASTM A240/A240M S20400 ASTM A959 201LN
Standard ASTM A240/A240M:2025 ASTM A959:2011
Category Stainless Steel Stainless Steel
C (%) <=0.030 <=0.03
Mn (%) 7.00-9.00 6.4-7.5
P (%) <=0.040 <=0.045
S (%) <=0.030 <=0.015
Si (%) <=1.00 <=1.00
Cr (%) 15.0-17.0 16.0-17.5
Ni (%) 1.50-3.00 4.0-5.0
N (%) 0.15-0.30 0.10-0.25
Cu (%) Not specified <=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 S20400 ASTM A959 201LN
Tensile Strength >=655 MPa Not specified
Yield Strength >=330 MPa Not specified
Elongation >=35% Not specified
Hardness <=241 HB Not specified
Condition Plate, sheet and strip; yield by 0.2 percent offset Not specified
Typical Applications
ASTM A240/A240M S20400
Pressure vessels and general applications (plate, sheet and strip)
ASTM A959 201LN
Wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1)
Key Differences
Can ASTM A240/A240M S20400 Be Substituted With ASTM A959 201LN?
ASTM A240/A240M S20400 and ASTM A959 201LN 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.
On M-EX Right Now
ASTM A240/A240M S20400
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ASTM A959 201LN
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Frequently Asked Questions
What is the difference between ASTM A240/A240M S20400 and ASTM A959 201LN?
ASTM A959 201LN specifies Cu which is not specified for ASTM A240/A240M S20400.
Can ASTM A240/A240M S20400 be substituted with ASTM A959 201LN?
ASTM A240/A240M S20400 and ASTM A959 201LN 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.