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
Al
<=0.15
<=0.50
<=1.70
<=0.025
<=0.020
0.01-0.05
0.01-0.12
0.006-0.05
<=0.30
<=0.50
<=0.40
<=0.10
<=0.015
>=0.015
Mechanical Properties
Tensile Strength
490-650 MPa
Yield Strength
>=390 MPa
Elongation
>=20%
Condition
Thermomechanical processed (TMCP), nominal thickness or diameter up to 16 mm (tensile strength: up to 40 mm)
More data from GB/T 1591:2018
From the standard
Upper yield strength by thickness6 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 120
335
Thermomechanical processed (TMCP) condition.
Source: GB/T 1591:2018, Table 10
Tensile strength by thickness5 thickness ranges
Thickness or diameter (mm)
Tensile strength Rm (MPa)
up to 40
490-650
over 40 to 63
480-640
over 63 to 80
470-630
over 80 to 100
460-620
over 100 to 120
450-610
Thermomechanical processed (TMCP) condition.
Source: GB/T 1591:2018, Table 10
Elongation after fracturesingle value
Elongation A, min
20 %
Single value printed for all thicknesses.
Source: GB/T 1591:2018, Table 10
Charpy V-notch impact energy4 test temperature(s)
Test temperature
Longitudinal KV2, min (J)
Transverse KV2, min (J)
20 deg C
63
40
0 deg C
55
34
-20 deg C
47
27
-40 deg C
31
20
Standard 10 mm x 10 mm x 55 mm specimen.
Source: GB/T 1591:2018, Table 11
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