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
<=0.20
<=0.50
0.90-1.70
<=0.025
<=0.020
0.01-0.05
0.01-0.20
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
Normalized or normalizing rolled, nominal thickness or diameter up to 16 mm (tensile strength: up to 100 mm)
More data from GB/T 1591:2018
From the standard
Upper yield strength by thickness8 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
310
over 200 to 250
300
Normalized or normalizing rolled condition.
Source: GB/T 1591:2018, Table 9
Tensile strength by thickness3 thickness ranges
Thickness or diameter (mm)
Tensile strength Rm (MPa)
up to 100
490-650
over 100 to 200
470-620
over 200 to 250
470-620
Normalized or normalizing rolled condition.
Source: GB/T 1591:2018, Table 9
Elongation after fracture by thickness6 thickness ranges
Thickness or diameter (mm)
Elongation A, min (%)
up to 16
20
over 16 to 40
20
over 40 to 63
20
over 63 to 80
19
over 80 to 200
19
over 200 to 250
19
Normalized or normalizing rolled condition.
Source: GB/T 1591:2018, Table 9
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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