1) 38CrMoAlA(JIS SACM645)

2) 42CrMo(JIS SCM440)

1) 38CrMoAlA(JIS SACM645)

2) 42CrMo(JIS SCM440)

Nitriding treatment

Electroplated hard-chrome finish

High frequency quenching

Spray bimetallic coating

Vacuum quenching

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