Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Chemical Composition (%)
C
Si
Mn
P
S
Cr
Ni
Cu
N
<=0.24
<=0.55
<=1.60
<=0.035
<=0.035
<=0.30
<=0.30
<=0.40
<=0.012
Mechanical Properties
Tensile Strength
470-630 MPa
Yield Strength
>=355 MPa
Elongation
>=22%
Condition
Hot-rolled (as-rolled), nominal thickness or diameter up to 16 mm for yield; tensile strength for up to 100 mm; elongation longitudinal, up to 40 mm
More data from GB/T 1591:2018
From the standard
Upper yield strength by thickness9 thickness ranges
Thickness or diameter (mm)
Upper yield strength ReH, min (MPa)
up to 16
355
over 16 to 40
345
over 40 to 63
335
over 63 to 80
325
over 80 to 100
315
over 100 to 150
295
over 150 to 200
285
over 200 to 250
275
over 250 to 400
-
Hot-rolled (as-rolled) condition.
Source: GB/T 1591:2018, Table 7
Tensile strength by thickness3 thickness ranges
Thickness or diameter (mm)
Tensile strength Rm (MPa)
up to 100
470-630
over 100 to 150
450-600
over 150 to 250
450-600
Hot-rolled (as-rolled) condition.
Source: GB/T 1591:2018, Table 7
Elongation after fracture by thickness5 thickness ranges
Thickness or diameter (mm)
Longitudinal A, min (%)
Transverse A, min (%)
up to 40
22
20
over 40 to 63
21
19
over 63 to 100
20
18
over 100 to 150
18
18
over 150 to 250
17
17
Hot-rolled (as-rolled) condition.
Source: GB/T 1591:2018, Table 8
Charpy V-notch impact energy1 test temperature(s)
Test temperature
Longitudinal KV2, min (J)
Transverse KV2, min (J)
20 deg C
34
27
Standard 10 mm x 10 mm x 55 mm specimen.
Source: GB/T 1591:2018, Table 11
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