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ASTM A240/A240M S33426 vs ASTM A959 29-4C

Related Material — 67.5% match based on chemical composition and mechanical property overlap.

ASTM A240/A240M S33426 (ASTM A240/A240M:2025) and ASTM A959 29-4C (ASTM A959:2011) are both steel grades. Both fall under the Stainless Steel category. ASTM A240/A240M S33426 is typically used for pressure vessels and general applications (plate, sheet and strip), while ASTM A959 29-4C is commonly used for wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1). ASTM A240/A240M S33426 is defined under ASTM International, originating from United States, while ASTM A959 29-4C is defined under ASTM International, originating from United States.

As per chemical composition, ASTM A240/A240M S33426 vs ASTM A959 29-4C is a 67.5% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a related material overall at 67.5%.

Frequently Compared With ASTM A240/A240M S33426:
GOST 5632 06Kh23N28 GB/T 3280 06Cr19Ni10 GOST 5632 08X18H10 EN 10088-1 1.4006 EN 10088-1 1.4301 EN 10088-1 1.4401 EN 10088-1 1.4845 IS 1570 (Part 7) 11Cr17Ni13W3TiH IS 1570 (Part 7) 12Cr12MoH IS 1570 (Part 7) 12Cr12MoVH IS 1570 (Part 7) 12Cr12Ni2Mo ASTM A959 .-
Match Breakdown
CHEMISTRY MATCH
67.5%
MECHANICAL MATCH
No shared data
OVERALL
67.5%
Specifications
Property ASTM A240/A240M S33426 ASTM A959 29-4C
Standard ASTM A240/A240M:2025 ASTM A959:2011
Category Stainless Steel Stainless Steel
C (%) <=0.030 <=0.030
Mn (%) <=1.00 <=1.00
P (%) <=0.030 <=0.040
S (%) <=0.015 <=0.030
Si (%) 0.80-1.50 <=1.00
Cr (%) 19.5-22.0 28.0-30.0
Ni (%) 19.0-21.0 <=1.00
Mo (%) 1.80-2.20 3.6-4.2
N (%) Not specified <=0.045
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 S33426 ASTM A959 29-4C
Tensile Strength >=515 MPa Not specified
Yield Strength >=205 MPa Not specified
Elongation >=30% Not specified
Hardness <=217 HB Not specified
Condition t <= 0.12 in. [3 mm] (first condition printed); yield by 0.2 percent offset Not specified
Typical Applications
ASTM A240/A240M S33426
Pressure vessels and general applications (plate, sheet and strip)
ASTM A959 29-4C
Wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1)
Key Differences
Can ASTM A240/A240M S33426 Be Substituted With ASTM A959 29-4C?
ASTM A240/A240M S33426 and ASTM A959 29-4C share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.
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ASTM A240/A240M S33426
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ASTM A959 29-4C
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Frequently Asked Questions
What is the difference between ASTM A240/A240M S33426 and ASTM A959 29-4C?
ASTM A959 29-4C specifies N which is not specified for ASTM A240/A240M S33426.
Can ASTM A240/A240M S33426 be substituted with ASTM A959 29-4C?
ASTM A240/A240M S33426 and ASTM A959 29-4C share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.