ASTM A240/A240M:2025 S31254: S31254: 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.
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
Cu
<=0.020
<=1.00
<=0.030
<=0.010
<=0.80
19.5-20.5
17.5-18.5
6.0-6.5
0.18-0.25
0.50-1.00
Mechanical Properties
Tensile Strength
>=690 MPa
Yield Strength
>=310 MPa
Elongation
>=35%
Hardness
<=223 HB
Condition
Sheet and strip (first condition printed); yield by 0.2 percent offset
More data from ASTM A240/A240M:2025
From the standard
Mechanical properties2 condition(s)
Product or thickness
Tensile strength, min (MPa)
Yield strength, min (MPa)
Elongation in 50 mm, min (%)
Sheet and strip
690
310
35
Plate
655
310
35
Minimum values; yield strength by the 0.2 percent offset method.
Source: ASTM A240/A240M:2025, Table 2
Hardness2 condition(s)
Product or thickness
Brinell HBW, max
Rockwell, max
Sheet and strip
223
96 HRBW
Plate
223
96 HRBW
Maximum values; either Brinell or Rockwell scale may be used.
Source: ASTM A240/A240M:2025, Table 2
Cold bend1 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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