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
Nb
V
Ti
Cr
Ni
Cu
Mo
N
<=0.20
<=0.55
<=1.70
<=0.025
<=0.025
<=0.05
<=0.13
<=0.05
<=0.30
<=0.50
<=0.40
<=0.10
<=0.015
Mechanical Properties
Tensile Strength
490-650 MPa
Yield Strength
>=390 MPa
Elongation
>=21%
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
390
over 16 to 40
380
over 40 to 63
360
over 63 to 80
340
over 80 to 100
340
over 100 to 150
320
over 150 to 200
-
over 200 to 250
-
over 250 to 400
-
Hot-rolled (as-rolled) condition.
Source: GB/T 1591:2018, Table 7
Tensile strength by thickness4 thickness ranges
Thickness or diameter (mm)
Tensile strength Rm (MPa)
up to 100
490-650
over 100 to 150
470-620
over 150 to 250
-
over 250 to 400
-
Hot-rolled (as-rolled) condition.
Source: GB/T 1591:2018, Table 7
Elongation after fracture by thickness4 thickness ranges
Thickness or diameter (mm)
Longitudinal A, min (%)
Transverse A, min (%)
up to 40
21
20
over 40 to 63
20
19
over 63 to 100
20
19
over 100 to 150
19
18
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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