B550CL steel Chemical Composition %
Grade
|
C
|
Si
|
Mn
|
Nb + Ti
|
P
|
S
|
B550CL
|
≤0.10
|
≤0.50
|
≤1.8
|
≤0.10
|
≤0.025
|
≤0.010
|
B550CL steel Processing
Wheel is made up of the rim and the disk. The main processing technique for rim is roll forming. Punch forming and spin forming are usually applied for disc. Punch forming is mainly used for disc of passenger cars, while disc of commercial cars are usually punch-formed (wigh inner tire) or spin-formed (without inner tire).
B550CL steel Mechanical Properties
Grade
|
Thickness(mm)
|
Yield strength
(MPa)
|
Tensile strength
(MPa)
|
Elongation A50 (%)
|
B550CL
|
1.8~12.0
|
≥450
|
550~700
|
≥24
|
B550CL is steel for automobile wheel rim, the welding process parameters are
Step
|
Cycles（0.02s）
|
Current density (KA/mm2)
|
Pressure(KN)
|
1 Preheating
|
4
|
80-100
|
53
|
2 Welding
|
4
|
100-200
|
53
|
3 Tempering
|
2
|
60-80
|
37
|
4 Holding
|
2
|
0
|
27
|
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