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ASTM A240/A240M S32550 vs ASTM A959 255

Strong Match — 100% match based on chemical composition and mechanical property overlap.

ASTM A240/A240M S32550 (ASTM A240/A240M:2025) and ASTM A959 255 (ASTM A959:2011) are both steel grades. Both fall under the Stainless Steel category. ASTM A240/A240M S32550 is typically used for pressure vessels and general applications (plate, sheet and strip), while ASTM A959 255 is commonly used for wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1). ASTM A240/A240M S32550 is defined under ASTM International, originating from United States, while ASTM A959 255 is defined under ASTM International, originating from United States.

As per chemical composition, ASTM A240/A240M S32550 vs ASTM A959 255 is a 100% 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 100%.

Frequently Compared With ASTM A240/A240M S32550:
EN 10088-1 1.4006 EN 10088-1 1.4301 GOST 5632 08X18H10 EN 10088-1 1.4845 IS 1570 (Part 7) 12Cr12MoH ASTM A959 2205 ASTM A959 26-3-3 ASTM A959 .- GB/T 3280 06Cr19Ni10 GOST 5632 06Kh23N28 EN 10088-1 1.4401 IS 1570 (Part 7) 11Cr17Ni13W3TiH
Match Breakdown
CHEMISTRY MATCH
100%
MECHANICAL MATCH
No shared data
OVERALL
100%
Specifications
Property ASTM A240/A240M S32550 ASTM A959 255
Standard ASTM A240/A240M:2025 ASTM A959:2011
Category Stainless Steel Stainless Steel
C (%) <=0.04 <=0.04
Mn (%) <=1.50 <=1.50
P (%) <=0.040 <=0.040
S (%) <=0.030 <=0.030
Si (%) <=1.00 <=1.00
Cr (%) 24.0-27.0 24.0-27.0
Ni (%) 4.5-6.5 4.5-6.5
Mo (%) 2.9-3.9 2.9-3.9
N (%) 0.10-0.25 0.10-0.25
Cu (%) 1.50-2.50 1.50-2.50
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 S32550 ASTM A959 255
Tensile Strength >=760 MPa Not specified
Yield Strength >=550 MPa Not specified
Elongation >=15% Not specified
Hardness <=302 HB Not specified
Condition Plate, sheet and strip; yield by 0.2 percent offset Not specified
Typical Applications
ASTM A240/A240M S32550
Pressure vessels and general applications (plate, sheet and strip)
ASTM A959 255
Wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1)
Can ASTM A240/A240M S32550 Be Substituted With ASTM A959 255?
ASTM A240/A240M S32550 and ASTM A959 255 overlap closely enough on chemistry and mechanical properties that ASTM A959 255 is often considered as a substitute for ASTM A240/A240M S32550 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 S32550
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ASTM A959 255
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Frequently Asked Questions
What is the difference between ASTM A240/A240M S32550 and ASTM A959 255?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can ASTM A240/A240M S32550 be substituted with ASTM A959 255?
ASTM A240/A240M S32550 and ASTM A959 255 overlap closely enough on chemistry and mechanical properties that ASTM A959 255 is often considered as a substitute for ASTM A240/A240M S32550 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.