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
<=0.18
<=0.50
0.90-1.65
<=0.025
<=0.020
0.005-0.05
0.01-0.12
0.006-0.05
<=0.30
<=0.50
<=0.40
<=0.10
<=0.015
>=0.015
Mechanical Properties
Tensile Strength
470-630 MPa
Yield Strength
>=355 MPa
Elongation
>=22%
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
355
over 16 to 40
345
over 40 to 63
335
over 63 to 80
325
over 80 to 100
315
over 100 to 150
295
over 150 to 200
285
over 200 to 250
275
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
470-630
over 100 to 200
450-600
over 200 to 250
450-600
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
22
over 16 to 40
22
over 40 to 63
22
over 63 to 80
21
over 80 to 200
21
over 200 to 250
21
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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