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ASTM A240/A240M S31277 vs ASTM A959 N08926

Close Alternative — 70.7% match based on chemical composition and mechanical property overlap.

ASTM A240/A240M S31277 (ASTM A240/A240M:2025) and ASTM A959 N08926 (ASTM A959:2011) are both steel grades. Both fall under the Stainless Steel category. ASTM A240/A240M S31277 is typically used for pressure vessels and general applications (plate, sheet and strip), while ASTM A959 N08926 is commonly used for wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1). ASTM A240/A240M S31277 is defined under ASTM International, originating from United States, while ASTM A959 N08926 is defined under ASTM International, originating from United States.

As per chemical composition, ASTM A240/A240M S31277 vs ASTM A959 N08926 is a 70.7% 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 70.7%.

Frequently Compared With ASTM A240/A240M S31277:
GOST 5632 08X18H10 IS 1570 (Part 7) 12Cr12MoH IS 1570 (Part 7) 12Cr12MoVH GB/T 3280 06Cr19Ni10 GOST 5632 06Kh23N28 EN 10088-1 1.4006 EN 10088-1 1.4301 EN 10088-1 1.4401 EN 10088-1 1.4845 IS 1570 (Part 7) 11Cr17Ni13W3TiH IS 1570 (Part 7) 12Cr12Ni2Mo ASTM A959 .-
Match Breakdown
CHEMISTRY MATCH
70.7%
MECHANICAL MATCH
No shared data
OVERALL
70.7%
Specifications
Property ASTM A240/A240M S31277 ASTM A959 N08926
Standard ASTM A240/A240M:2025 ASTM A959:2011
Category Stainless Steel Stainless Steel
C (%) <=0.020 <=0.020
Mn (%) <=3.00 <=2.00
P (%) <=0.030 <=0.030
S (%) <=0.010 <=0.010
Si (%) <=0.50 <=0.50
Cr (%) 20.5-23.0 19.0-21.0
Ni (%) 26.0-28.0 24.0-26.0
Mo (%) 6.5-8.0 6.0-7.0
N (%) 0.30-0.40 0.15-0.25
Cu (%) 0.50-1.50 0.50-1.50
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 S31277 ASTM A959 N08926
Tensile Strength >=770 MPa Not specified
Yield Strength >=360 MPa Not specified
Elongation >=40% Not specified
Condition Plate, sheet and strip; yield by 0.2 percent offset Not specified
Typical Applications
ASTM A240/A240M S31277
Pressure vessels and general applications (plate, sheet and strip)
ASTM A959 N08926
Wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1)
Can ASTM A240/A240M S31277 Be Substituted With ASTM A959 N08926?
ASTM A240/A240M S31277 and ASTM A959 N08926 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 S31277
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ASTM A959 N08926
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Frequently Asked Questions
What is the difference between ASTM A240/A240M S31277 and ASTM A959 N08926?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can ASTM A240/A240M S31277 be substituted with ASTM A959 N08926?
ASTM A240/A240M S31277 and ASTM A959 N08926 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.