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
<=0.16
<=0.50
<=1.70
<=0.030
<=0.030
0.01-0.05
0.01-0.12
0.006-0.05
<=0.30
<=0.80
<=0.40
<=0.20
<=0.015
>=0.015
Mechanical Properties
Tensile Strength
520-680 MPa
Yield Strength
>=420 MPa
Elongation
>=19%
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
420
over 16 to 40
400
over 40 to 63
390
over 63 to 80
380
over 80 to 100
370
over 100 to 120
365
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
520-680
over 40 to 63
500-660
over 63 to 80
480-640
over 80 to 100
470-630
over 100 to 120
460-620
Thermomechanical processed (TMCP) condition.
Source: GB/T 1591:2018, Table 10
Elongation after fracturesingle value
Elongation A, min
19 %
Single value printed for all thicknesses.
Source: GB/T 1591:2018, Table 10
Charpy V-notch impact energy1 test temperature(s)
Test temperature
Longitudinal KV2, min (J)
Transverse KV2, min (J)
0 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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