Automobile Series
Down
Engine System
Material
45#、X46Cr13、40Cr13、10B21、
430F、40Cr、Al6061-T6、20Cr13、
12L14、42CrMo4
430F、40Cr、Al6061-T6、20Cr13、
12L14、42CrMo4
Outer diameter tolerance
0.005mm
Inner hole tolerance
0.018mm
Coaxiality
0.01mm
Surface roughness
Rz1.0
Runout
0.003mm
Roundness
0.001mm
Cylindricity
0.003mm
Heat treatment
overall quenching, gas nitriding, high-frequency quenching
Surface treatment
electric zinc plating, electric Zn-Ni alloy plating, electrophoresis
Salt spray test
144/360/720 hours without red rust
Common/hard anodizing
HV400 min, hard oxide layer more than 10um
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