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ASTM A959 409 vs ASTM A240/A240M S41008

Strong Match — 90.5% match based on chemical composition and mechanical property overlap.

ASTM A959 409 (ASTM A959:2011) and ASTM A240/A240M S41008 (ASTM A240/A240M:2025) are both steel grades. Both fall under the Stainless Steel category. ASTM A959 409 is typically used for wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1), while ASTM A240/A240M S41008 is commonly used for pressure vessels and general applications (plate, sheet and strip). ASTM A959 409 is defined under ASTM International, originating from United States, while ASTM A240/A240M S41008 is defined under ASTM International, originating from United States.

As per chemical composition, ASTM A959 409 vs ASTM A240/A240M S41008 is a 90.5% 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 90.5%.

Frequently Compared With ASTM A959 409:
EN 10088-1 1.4301 GOST 5632 08X18H10 EN 10088-1 1.4845 GB/T 3280 06Cr19Ni10 GOST 5632 06Kh23N28 EN 10088-1 1.4006 IS 1570 (Part 7) 12Cr12Ni2Mo EN 10088-1 1.4401 IS 1570 (Part 7) 11Cr17Ni13W3TiH IS 1570 (Part 7) 12Cr13H ASTM A959 .- IS 1570 (Part 7) 12Cr12MoH
Match Breakdown
CHEMISTRY MATCH
90.5%
MECHANICAL MATCH
No shared data
OVERALL
90.5%
Specifications
Property ASTM A959 409 ASTM A240/A240M S41008
Standard ASTM A959:2011 ASTM A240/A240M:2025
Category Stainless Steel Stainless Steel
C (%) <=0.08 <=0.08
Cr (%) 10.5-11.7 11.5-13.5
Mn (%) <=1.00 <=1.00
Ni (%) <=0.50 <=0.60
P (%) <=0.045 <=0.040
S (%) <=0.030 <=0.030
Si (%) <=1.00 <=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 A959 409 ASTM A240/A240M S41008
Tensile Strength Not specified >=415 MPa
Yield Strength Not specified >=205 MPa
Elongation Not specified >=22%
Hardness Not specified <=183 HB
Condition Not specified Plate, sheet and strip; yield by 0.2 percent offset
Typical Applications
ASTM A959 409
Wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1)
ASTM A240/A240M S41008
Pressure vessels and general applications (plate, sheet and strip)
Can ASTM A959 409 Be Substituted With ASTM A240/A240M S41008?
ASTM A959 409 and ASTM A240/A240M S41008 overlap closely enough on chemistry and mechanical properties that ASTM A240/A240M S41008 is often considered as a substitute for ASTM A959 409 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 409
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ASTM A240/A240M S41008
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Frequently Asked Questions
What is the difference between ASTM A959 409 and ASTM A240/A240M S41008?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can ASTM A959 409 be substituted with ASTM A240/A240M S41008?
ASTM A959 409 and ASTM A240/A240M S41008 overlap closely enough on chemistry and mechanical properties that ASTM A240/A240M S41008 is often considered as a substitute for ASTM A959 409 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.