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ASTM A959 348H vs ASTM A240/A240M S34809

Strong Match — 96.5% match based on chemical composition and mechanical property overlap.

ASTM A959 348H (ASTM A959:2011) and ASTM A240/A240M S34809 (ASTM A240/A240M:2025) are both steel grades. Both fall under the Stainless Steel category. ASTM A959 348H is typically used for wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1), while ASTM A240/A240M S34809 is commonly used for pressure vessels and general applications (plate, sheet and strip). ASTM A959 348H is defined under ASTM International, originating from United States, while ASTM A240/A240M S34809 is defined under ASTM International, originating from United States.

As per chemical composition, ASTM A959 348H vs ASTM A240/A240M S34809 is a 96.5% 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 96.5%.

Frequently Compared With ASTM A959 348H:
GOST 5632 06Kh23N28 EN 10088-1 1.4401 IS 1570 (Part 7) 11Cr17Ni13W3TiH ASTM A959 .- EN 10088-1 1.4006 EN 10088-1 1.4301 IS 1570 (Part 7) 12Cr12MoVH GB/T 3280 06Cr19Ni10 GOST 5632 08X18H10 IS 1570 (Part 7) 12Cr12MoH IS 1570 (Part 7) 12Cr13H EN 10088-1 1.4845
Match Breakdown
CHEMISTRY MATCH
96.5%
MECHANICAL MATCH
No shared data
OVERALL
96.5%
Specifications
Property ASTM A959 348H ASTM A240/A240M S34809
Standard ASTM A959:2011 ASTM A240/A240M:2025
Category Stainless Steel Stainless Steel
C (%) 0.04-0.10 0.04-0.10
Co (%) <=0.20 <=0.20
Cr (%) 17.0-19.0 17.0-19.0
Mn (%) <=2.00 <=2.00
Ni (%) 9.0-12.0 9.0-13.0
P (%) <=0.045 <=0.045
S (%) <=0.030 <=0.030
Si (%) <=1.00 <=0.75
Ta (%) <=0.10 <=0.10
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 348H ASTM A240/A240M S34809
Tensile Strength Not specified >=515 MPa
Yield Strength Not specified >=205 MPa
Elongation Not specified >=40%
Hardness Not specified <=201 HB
Condition Not specified Plate, sheet and strip; yield by 0.2 percent offset
Typical Applications
ASTM A959 348H
Wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1)
ASTM A240/A240M S34809
Pressure vessels and general applications (plate, sheet and strip)
Can ASTM A959 348H Be Substituted With ASTM A240/A240M S34809?
ASTM A959 348H and ASTM A240/A240M S34809 overlap closely enough on chemistry and mechanical properties that ASTM A240/A240M S34809 is often considered as a substitute for ASTM A959 348H 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 348H
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ASTM A240/A240M S34809
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Frequently Asked Questions
What is the difference between ASTM A959 348H and ASTM A240/A240M S34809?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can ASTM A959 348H be substituted with ASTM A240/A240M S34809?
ASTM A959 348H and ASTM A240/A240M S34809 overlap closely enough on chemistry and mechanical properties that ASTM A240/A240M S34809 is often considered as a substitute for ASTM A959 348H in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.