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ASTM A959 S31727 vs ASTM A240/A240M S31726

Close Alternative — 75.9% match based on chemical composition and mechanical property overlap.

ASTM A959 S31727 (ASTM A959:2011) and ASTM A240/A240M S31726 (ASTM A240/A240M:2025) are both steel grades. Both fall under the Stainless Steel category. ASTM A959 S31727 is typically used for wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1), while ASTM A240/A240M S31726 is commonly used for pressure vessels and general applications (plate, sheet and strip). ASTM A959 S31727 is defined under ASTM International, originating from United States, while ASTM A240/A240M S31726 is defined under ASTM International, originating from United States.

As per chemical composition, ASTM A959 S31727 vs ASTM A240/A240M S31726 is a 75.9% 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 75.9%.

Frequently Compared With ASTM A959 S31727:
GB/T 3280 06Cr19Ni10 ASTM A959 25-4-4 EN 10088-1 1.4006 IS 1570 (Part 7) 11Cr17Ni13W3TiH GOST 5632 06Kh23N28 GOST 5632 08X18H10 EN 10088-1 1.4401 IS 1570 (Part 7) 12Cr12MoVH ASTM A959 .- EN 10088-1 1.4301 IS 1570 (Part 7) 12Cr12MoH EN 10088-1 1.4845
Match Breakdown
CHEMISTRY MATCH
75.9%
MECHANICAL MATCH
No shared data
OVERALL
75.9%
Specifications
Property ASTM A959 S31727 ASTM A240/A240M S31726
Standard ASTM A959:2011 ASTM A240/A240M:2025
Category Stainless Steel Stainless Steel
C (%) <=0.030 <=0.030
Cr (%) 17.5-19.0 17.0-20.0
Cu (%) 2.8-4.0 Not specified
Mn (%) <=1.00 <=2.00
Mo (%) 3.8-4.5 4.0-5.0
N (%) 0.15-0.21 0.10-0.20
Ni (%) 14.5-16.5 13.5-17.5
P (%) <=0.030 <=0.045
S (%) <=0.030 <=0.030
Si (%) <=1.00 <=0.75
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 S31727 ASTM A240/A240M S31726
Tensile Strength Not specified >=550 MPa
Yield Strength Not specified >=240 MPa
Elongation Not specified >=40%
Hardness Not specified <=223 HB
Condition Not specified Plate, sheet and strip; yield by 0.2 percent offset
Typical Applications
ASTM A959 S31727
Wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1)
ASTM A240/A240M S31726
Pressure vessels and general applications (plate, sheet and strip)
Key Differences
Can ASTM A959 S31727 Be Substituted With ASTM A240/A240M S31726?
ASTM A959 S31727 and ASTM A240/A240M S31726 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 S31727
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ASTM A240/A240M S31726
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Frequently Asked Questions
What is the difference between ASTM A959 S31727 and ASTM A240/A240M S31726?
ASTM A959 S31727 specifies Cu which is not specified for ASTM A240/A240M S31726.
Can ASTM A959 S31727 be substituted with ASTM A240/A240M S31726?
ASTM A959 S31727 and ASTM A240/A240M S31726 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.