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ASTM A959 S31266 vs ASTM A240/A240M S31266

Strong Match — 100% match based on chemical composition and mechanical property overlap.

ASTM A959 S31266 (ASTM A959:2011) and ASTM A240/A240M S31266 (ASTM A240/A240M:2025) are both steel grades. Both fall under the Stainless Steel category. ASTM A959 S31266 is typically used for wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1), while ASTM A240/A240M S31266 is commonly used for pressure vessels and general applications (plate, sheet and strip). ASTM A959 S31266 is defined under ASTM International, originating from United States, while ASTM A240/A240M S31266 is defined under ASTM International, originating from United States.

As per chemical composition, ASTM A959 S31266 vs ASTM A240/A240M S31266 is a 100% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a strong match overall at 100%.

Frequently Compared With ASTM A959 S31266:
EN 10088-1 1.4301 IS 1570 (Part 7) 11Cr17Ni13W3TiH GB/T 3280 06Cr19Ni10 GOST 5632 08X18H10 IS 1570 (Part 7) 12Cr12MoH IS 1570 (Part 7) 12Cr12MoVH IS 1570 (Part 7) 12Cr12Ni2Mo ASTM A959 .- GOST 5632 06Kh23N28 EN 10088-1 1.4006 EN 10088-1 1.4401 EN 10088-1 1.4845
Match Breakdown
CHEMISTRY MATCH
100%
MECHANICAL MATCH
No shared data
OVERALL
100%
Specifications
Property ASTM A959 S31266 ASTM A240/A240M S31266
Standard ASTM A959:2011 ASTM A240/A240M:2025
Category Stainless Steel Stainless Steel
C (%) <=0.030 <=0.030
Cr (%) 23.0-25.0 23.0-25.0
Cu (%) 1.00-2.50 1.00-2.50
Mn (%) 2.0-4.0 2.00-4.00
Mo (%) 5.2-6.2 5.2-6.2
N (%) 0.35-0.60 0.35-0.60
Ni (%) 21.0-24.0 21.0-24.0
P (%) <=0.035 <=0.035
S (%) <=0.020 <=0.020
Si (%) <=1.00 <=1.00
W (%) 1.50-2.50 1.50-2.50
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property ASTM A959 S31266 ASTM A240/A240M S31266
Tensile Strength Not specified >=750 MPa
Yield Strength Not specified >=420 MPa
Elongation Not specified >=35%
Condition Not specified Plate, sheet and strip; yield by 0.2 percent offset
Typical Applications
ASTM A959 S31266
Wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1)
ASTM A240/A240M S31266
Pressure vessels and general applications (plate, sheet and strip)
Can ASTM A959 S31266 Be Substituted With ASTM A240/A240M S31266?
ASTM A959 S31266 and ASTM A240/A240M S31266 overlap closely enough on chemistry and mechanical properties that ASTM A240/A240M S31266 is often considered as a substitute for ASTM A959 S31266 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
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ASTM A959 S31266
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ASTM A240/A240M S31266
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Frequently Asked Questions
What is the difference between ASTM A959 S31266 and ASTM A240/A240M S31266?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can ASTM A959 S31266 be substituted with ASTM A240/A240M S31266?
ASTM A959 S31266 and ASTM A240/A240M S31266 overlap closely enough on chemistry and mechanical properties that ASTM A240/A240M S31266 is often considered as a substitute for ASTM A959 S31266 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.