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
<=0.60
1.00-1.70
<=0.025
<=0.020
0.01-0.05
0.01-0.20
0.006-0.05
<=0.30
<=0.80
<=0.40
<=0.10
<=0.025
>=0.015
Mechanical Properties
Tensile Strength
520-680 MPa
Yield Strength
>=420 MPa
Elongation
>=19%
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
420
over 16 to 40
400
over 40 to 63
390
over 63 to 80
370
over 80 to 100
360
over 100 to 150
340
over 150 to 200
330
over 200 to 250
320
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
520-680
over 100 to 200
500-650
over 200 to 250
500-650
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
19
over 16 to 40
19
over 40 to 63
19
over 63 to 80
18
over 80 to 200
18
over 200 to 250
18
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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