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ASTM A240/A240M S34809 vs ASTM A959 347H

Strong Match — 92.4% match based on chemical composition and mechanical property overlap.

ASTM A240/A240M S34809 (ASTM A240/A240M:2025) and ASTM A959 347H (ASTM A959:2011) are both steel grades. Both fall under the Stainless Steel category. ASTM A240/A240M S34809 is typically used for pressure vessels and general applications (plate, sheet and strip), while ASTM A959 347H is commonly used for wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1). ASTM A240/A240M S34809 is defined under ASTM International, originating from United States, while ASTM A959 347H is defined under ASTM International, originating from United States.

As per chemical composition, ASTM A240/A240M S34809 vs ASTM A959 347H is a 92.4% 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 92.4%.

Frequently Compared With ASTM A240/A240M S34809:
GB/T 3280 06Cr19Ni10 GOST 5632 06Kh23N28 EN 10088-1 1.4006 EN 10088-1 1.4301 EN 10088-1 1.4401 IS 1570 (Part 7) 12Cr12Ni2Mo IS 1570 (Part 7) 12Cr13H GOST 5632 08X18H10 IS 1570 (Part 7) 11Cr17Ni13W3TiH IS 1570 (Part 7) 12Cr12MoH EN 10088-1 1.4845 ASTM A959 .-
Match Breakdown
CHEMISTRY MATCH
92.4%
MECHANICAL MATCH
No shared data
OVERALL
92.4%
Specifications
Property ASTM A240/A240M S34809 ASTM A959 347H
Standard ASTM A240/A240M:2025 ASTM A959:2011
Category Stainless Steel Stainless Steel
C (%) 0.04-0.10 0.04-0.10
Mn (%) <=2.00 <=2.00
P (%) <=0.045 <=0.045
S (%) <=0.030 <=0.030
Si (%) <=0.75 <=1.00
Cr (%) 17.0-19.0 17.0-19.0
Ni (%) 9.0-13.0 9.0-12.0
Ta (%) <=0.10 Not specified
Co (%) <=0.20 Not specified
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property ASTM A240/A240M S34809 ASTM A959 347H
Tensile Strength >=515 MPa Not specified
Yield Strength >=205 MPa Not specified
Elongation >=40% Not specified
Hardness <=201 HB Not specified
Condition Plate, sheet and strip; yield by 0.2 percent offset Not specified
Typical Applications
ASTM A240/A240M S34809
Pressure vessels and general applications (plate, sheet and strip)
ASTM A959 347H
Wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1)
Key Differences
Can ASTM A240/A240M S34809 Be Substituted With ASTM A959 347H?
ASTM A240/A240M S34809 and ASTM A959 347H overlap closely enough on chemistry and mechanical properties that ASTM A959 347H is often considered as a substitute for ASTM A240/A240M S34809 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
On M-EX Right Now
ASTM A240/A240M S34809
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ASTM A959 347H
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Frequently Asked Questions
What is the difference between ASTM A240/A240M S34809 and ASTM A959 347H?
ASTM A240/A240M S34809 specifies Ta, Co which are not specified for ASTM A959 347H.
Can ASTM A240/A240M S34809 be substituted with ASTM A959 347H?
ASTM A240/A240M S34809 and ASTM A959 347H overlap closely enough on chemistry and mechanical properties that ASTM A959 347H is often considered as a substitute for ASTM A240/A240M S34809 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.