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
<=0.020
<=2.00
<=0.030
<=0.010
<=0.50
24.0-26.0
20.5-23.5
1.60-2.60
0.09-0.15
Mechanical Properties
Tensile Strength
>=580 MPa
Yield Strength
>=270 MPa
Elongation
>=25%
Hardness
<=217 HB
Condition
t <= 0.25 in. (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 (%)
t <= 0.25 in.
580
270
25
t > 0.25 in.
540
255
25
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
t <= 0.25 in.
217
95 HRBW
t > 0.25 in.
217
95 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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