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ASTM A240/A240M S44800 vs ASTM A959 29-4

Related Material — 69.9% match based on chemical composition and mechanical property overlap.

ASTM A240/A240M S44800 (ASTM A240/A240M:2025) and ASTM A959 29-4 (ASTM A959:2011) are both steel grades. Both fall under the Stainless Steel category. ASTM A240/A240M S44800 is typically used for pressure vessels and general applications (plate, sheet and strip), while ASTM A959 29-4 is commonly used for wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1). ASTM A240/A240M S44800 is defined under ASTM International, originating from United States, while ASTM A959 29-4 is defined under ASTM International, originating from United States.

As per chemical composition, ASTM A240/A240M S44800 vs ASTM A959 29-4 is a 91.7% 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 69.9%.

Frequently Compared With ASTM A240/A240M S44800:
ASTM A959 29-4-2 ASTM A959 29-4C 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 ASTM A959 .- GB/T 3280 06Cr19Ni10 GOST 5632 06Kh23N28
Match Breakdown
CHEMISTRY MATCH
91.7%
MECHANICAL MATCH
No shared data
OVERALL
69.9%
Specifications
Property ASTM A240/A240M S44800 ASTM A959 29-4
Standard ASTM A240/A240M:2025 ASTM A959:2011
Category Stainless Steel Stainless Steel
C (%) <=0.010 <=0.010
Mn (%) <=0.30 <=0.30
P (%) <=0.025 <=0.025
S (%) <=0.020 <=0.020
Si (%) <=0.20 <=0.20
Cr (%) 28.0-30.0 28.0-30.0
Ni (%) 2.00-2.50 <=0.15
Mo (%) 3.5-4.2 3.5-4.2
N (%) <=0.020 <=0.020
Cu (%) <=0.15 <=0.15
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 S44800 ASTM A959 29-4
Tensile Strength >=550 MPa Not specified
Yield Strength >=415 MPa Not specified
Elongation >=20% Not specified
Hardness <=223 HB Not specified
Condition Plate, sheet and strip; yield by 0.2 percent offset Not specified
Typical Applications
ASTM A240/A240M S44800
Pressure vessels and general applications (plate, sheet and strip)
ASTM A959 29-4
Wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1)
Can ASTM A240/A240M S44800 Be Substituted With ASTM A959 29-4?
ASTM A240/A240M S44800 and ASTM A959 29-4 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.
On M-EX Right Now
ASTM A240/A240M S44800
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ASTM A959 29-4
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Frequently Asked Questions
What is the difference between ASTM A240/A240M S44800 and ASTM A959 29-4?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can ASTM A240/A240M S44800 be substituted with ASTM A959 29-4?
ASTM A240/A240M S44800 and ASTM A959 29-4 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.