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ASTM A240/A240M S40955 vs ASTM A959 S40930

Close Alternative — 81.7% match based on chemical composition and mechanical property overlap.

ASTM A240/A240M S40955 (ASTM A240/A240M:2025) and ASTM A959 S40930 (ASTM A959:2011) are both steel grades. Both fall under the Stainless Steel category. ASTM A240/A240M S40955 is typically used for pressure vessels and general applications (plate, sheet and strip), while ASTM A959 S40930 is commonly used for wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1). ASTM A240/A240M S40955 is defined under ASTM International, originating from United States, while ASTM A959 S40930 is defined under ASTM International, originating from United States.

As per chemical composition, ASTM A240/A240M S40955 vs ASTM A959 S40930 is a 81.7% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a close alternative overall at 81.7%.

Frequently Compared With ASTM A240/A240M S40955:
GOST 5632 06Kh23N28 EN 10088-1 1.4006 GB/T 3280 06Cr19Ni10 GOST 5632 08X18H10 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 IS 1570 (Part 7) 12Cr13H
Match Breakdown
CHEMISTRY MATCH
81.7%
MECHANICAL MATCH
No shared data
OVERALL
81.7%
Specifications
Property ASTM A240/A240M S40955 ASTM A959 S40930
Standard ASTM A240/A240M:2025 ASTM A959:2011
Category Stainless Steel Stainless Steel
C (%) <=0.030 <=0.030
Mn (%) <=1.00 <=1.00
P (%) <=0.040 <=0.040
S (%) <=0.020 <=0.020
Si (%) 1.00-2.00 <=1.00
Cr (%) 10.5-12.0 10.5-11.7
Ni (%) <=0.50 <=0.50
N (%) <=0.030 <=0.030
Nb (%) 0.20-0.50 Not specified
Ti (%) 0.05-0.30 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 S40955 ASTM A959 S40930
Tensile Strength >=380 MPa Not specified
Yield Strength >=205 MPa Not specified
Elongation >=22% Not specified
Hardness <=88 HRBW Not specified
Condition Plate, sheet and strip; yield by 0.2 percent offset Not specified
Typical Applications
ASTM A240/A240M S40955
Pressure vessels and general applications (plate, sheet and strip)
ASTM A959 S40930
Wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1)
Key Differences
Can ASTM A240/A240M S40955 Be Substituted With ASTM A959 S40930?
ASTM A240/A240M S40955 and ASTM A959 S40930 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.
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ASTM A240/A240M S40955
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ASTM A959 S40930
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Frequently Asked Questions
What is the difference between ASTM A240/A240M S40955 and ASTM A959 S40930?
ASTM A240/A240M S40955 specifies Nb, Ti which are not specified for ASTM A959 S40930.
Can ASTM A240/A240M S40955 be substituted with ASTM A959 S40930?
ASTM A240/A240M S40955 and ASTM A959 S40930 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.