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ASTM A240/A240M:2025 S20400 Steel: Specifications & Listings

ASTM A240/A240M:2025 S20400: S20400: austenitic (chromium-nickel or chromium-manganese-nickel) stainless steel plate, sheet and strip (UNS number, no type name printed). Specified in ASTM A240/A240M:2025.

Category: Stainless Steel
Grade Details
GradeASTM A240/A240M:2025 S20400
Standard ASTM A240/A240M:2025
ApplicationsPressure vessels and general applications (plate, sheet and strip)
Equivalent / Similar Grades
Grade Standard Region Live on M-EX
ASTM A959 S20400 ASTM A959:2011 USA No activity yet
Grade ComparisonCompare With a Specific Grade →
Grade Standard Match
ASTM A959 S20400 ASTM A959:2011 Strong Match
ASTM A959 201L ASTM A959:2011 Close Alternative
EN 10088-1 X2CrMnNiN17-7-5 EN 10088-1:2014 Close Alternative
EN 10088-1 X2CrMnNiN17-7-5 EN 10088-1:2023 Close Alternative
ASTM A959 201LN ASTM A959:2011 Close Alternative
ASTM A959 XM-11 ASTM A959:2011 Related Material
ASTM A959 301L ASTM A959:2011 Related Material
ASTM A959 301LN ASTM A959:2011 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 N
<=0.030 7.00-9.00 <=0.040 <=0.030 <=1.00 15.0-17.0 1.50-3.00 0.15-0.30
Mechanical Properties
Tensile Strength >=655 MPa
Yield Strength >=330 MPa
Elongation >=35%
Hardness <=241 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 (%)
All65533035
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
All241100 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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