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ASTM A959 317LM vs ASTM A240/A240M S31726

Strong Match — 93.1% match based on chemical composition and mechanical property overlap.

ASTM A959 317LM (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 317LM 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 317LM 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 317LM vs ASTM A240/A240M S31726 is a 93.1% 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 93.1%.

Frequently Compared With ASTM A959 317LM:
ASTM A959 2304 EN 10088-1 1.4006 IS 1570 (Part 7) 12Cr12Ni2Mo ASTM A959 .- IS 1570 (Part 7) 11Cr17Ni13W3TiH IS 1570 (Part 7) 12Cr12MoVH GB/T 3280 06Cr19Ni10 GOST 5632 06Kh23N28 GOST 5632 08X18H10 IS 1570 (Part 7) 12Cr12MoH EN 10088-1 1.4301 EN 10088-1 1.4401
Match Breakdown
CHEMISTRY MATCH
93.1%
MECHANICAL MATCH
No shared data
OVERALL
93.1%
Specifications
Property ASTM A959 317LM ASTM A240/A240M S31726
Standard ASTM A959:2011 ASTM A240/A240M:2025
Category Stainless Steel Stainless Steel
C (%) <=0.030 <=0.030
Cr (%) 18.0-20.0 17.0-20.0
Mn (%) <=2.00 <=2.00
Mo (%) 4.0-5.0 4.0-5.0
N (%) <=0.20 0.10-0.20
Ni (%) 13.5-17.5 13.5-17.5
P (%) <=0.045 <=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 317LM 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 317LM
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)
Can ASTM A959 317LM Be Substituted With ASTM A240/A240M S31726?
ASTM A959 317LM and ASTM A240/A240M S31726 overlap closely enough on chemistry and mechanical properties that ASTM A240/A240M S31726 is often considered as a substitute for ASTM A959 317LM 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 317LM
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ASTM A240/A240M S31726
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Frequently Asked Questions
What is the difference between ASTM A959 317LM and ASTM A240/A240M S31726?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can ASTM A959 317LM be substituted with ASTM A240/A240M S31726?
ASTM A959 317LM and ASTM A240/A240M S31726 overlap closely enough on chemistry and mechanical properties that ASTM A240/A240M S31726 is often considered as a substitute for ASTM A959 317LM in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.