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ASTM A240/A240M S44500 vs ASTM A959 S44500

Strong Match — 94.8% match based on chemical composition and mechanical property overlap.

ASTM A240/A240M S44500 (ASTM A240/A240M:2025) and ASTM A959 S44500 (ASTM A959:2011) are both steel grades. Both fall under the Stainless Steel category. ASTM A240/A240M S44500 is typically used for pressure vessels and general applications (plate, sheet and strip), while ASTM A959 S44500 is commonly used for wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1). ASTM A240/A240M S44500 is defined under ASTM International, originating from United States, while ASTM A959 S44500 is defined under ASTM International, originating from United States.

As per chemical composition, ASTM A240/A240M S44500 vs ASTM A959 S44500 is a 94.8% 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 94.8%.

Frequently Compared With ASTM A240/A240M S44500:
ASTM A959 .- EN 10088-1 1.4301 EN 10088-1 1.4006 EN 10088-1 1.4401 EN 10088-1 1.4845 IS 1570 (Part 7) 12Cr12MoVH GOST 5632 06Kh23N28 GOST 5632 08X18H10 IS 1570 (Part 7) 12Cr12MoH IS 1570 (Part 7) 12Cr12Ni2Mo IS 1570 (Part 7) 12Cr13H GB/T 3280 06Cr19Ni10
Match Breakdown
CHEMISTRY MATCH
94.8%
MECHANICAL MATCH
No shared data
OVERALL
94.8%
Specifications
Property ASTM A240/A240M S44500 ASTM A959 S44500
Standard ASTM A240/A240M:2025 ASTM A959:2011
Category Stainless Steel Stainless Steel
C (%) <=0.020 <=0.020
Mn (%) <=1.00 <=1.00
P (%) <=0.040 <=0.040
S (%) <=0.012 <=0.012
Si (%) <=1.00 <=1.00
Cr (%) 19.0-21.0 19.0-21.0
Ni (%) <=0.60 <=0.60
N (%) <=0.03 <=0.03
Cu (%) 0.30-0.60 0.30-0.60
Nb (%) <=0.80 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 S44500 ASTM A959 S44500
Tensile Strength >=427 MPa Not specified
Yield Strength >=205 MPa Not specified
Elongation >=22% Not specified
Hardness <=83 HRBW Not specified
Condition Plate, sheet and strip; yield by 0.2 percent offset Not specified
Typical Applications
ASTM A240/A240M S44500
Pressure vessels and general applications (plate, sheet and strip)
ASTM A959 S44500
Wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1)
Key Differences
Can ASTM A240/A240M S44500 Be Substituted With ASTM A959 S44500?
ASTM A240/A240M S44500 and ASTM A959 S44500 overlap closely enough on chemistry and mechanical properties that ASTM A959 S44500 is often considered as a substitute for ASTM A240/A240M S44500 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 A240/A240M S44500
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ASTM A959 S44500
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Frequently Asked Questions
What is the difference between ASTM A240/A240M S44500 and ASTM A959 S44500?
ASTM A240/A240M S44500 specifies Nb which is not specified for ASTM A959 S44500.
Can ASTM A240/A240M S44500 be substituted with ASTM A959 S44500?
ASTM A240/A240M S44500 and ASTM A959 S44500 overlap closely enough on chemistry and mechanical properties that ASTM A959 S44500 is often considered as a substitute for ASTM A240/A240M S44500 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.