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
540-720 MPa
Yield Strength
>=460 MPa
Elongation
>=17%
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
460
over 16 to 40
440
over 40 to 63
430
over 63 to 80
410
over 80 to 100
400
over 100 to 150
380
over 150 to 200
370
over 200 to 250
370
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
540-720
over 100 to 200
530-710
over 200 to 250
510-690
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
17
over 16 to 40
17
over 40 to 63
17
over 63 to 80
17
over 80 to 200
17
over 200 to 250
16
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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