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ASTM A240/A240M:2025 S31025 Steel: Specifications & Listings

ASTM A240/A240M:2025 S31025: S31025 (type 310MoCbN): austenitic (chromium-nickel or chromium-manganese-nickel) stainless steel plate, sheet and strip (UNS S31025). Specified in ASTM A240/A240M:2025.

Category: Stainless Steel
Grade Details
GradeASTM A240/A240M:2025 S31025
Standard ASTM A240/A240M:2025
ApplicationsPressure vessels and general applications (plate, sheet and strip)
Grade ComparisonCompare With a Specific Grade →
Grade Standard Match
ASTM A959 329 ASTM A959:2011 Related Material
IS 11169 (Part 1) 41Cr2Ni2Mo2 IS 11169 (Part 1):2022 Related Material
IS 11169 (Part 1) 41Cr2Ni2Mo2S3 IS 11169 (Part 1):2022 Related Material
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Chemical Composition (%)
C Mn P S Si Cr Ni Mo N Nb Ti B
<=0.10 <=1.50 <=0.030 <=0.030 <=1.00 19.5-23.0 23.0-26.0 1.0-2.0 0.10-0.25 0.10-0.40 <=0.20 0.002-0.010
Mechanical Properties
Tensile Strength >=640 MPa
Yield Strength >=270 MPa
Elongation >=30%
Hardness <=256 HB
Condition Plate, sheet and strip; yield by 0.2 percent offset

More data from ASTM A240/A240M:2025

From the standard
Mechanical properties 1 condition(s)
Product or thicknessTensile strength, min (MPa)Yield strength, min (MPa)Elongation in 50 mm, min (%)
All64027030
Minimum values; yield strength by the 0.2 percent offset method.
Source: ASTM A240/A240M:2025, Table 2
Hardness 1 condition(s)
Product or thicknessBrinell HBW, maxRockwell, max
All256100 HRBW
Maximum values; either Brinell or Rockwell scale may be used.
Source: ASTM A240/A240M:2025, Table 2
Cold bend 1 value
Cold bend angle
not required
Bend tests are not required for chromium steels thicker than 1 in. [25 mm] or for any austenitic or duplex steel regardless of thickness.
Source: ASTM A240/A240M:2025, Table 2

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