... 1) 38CrMoAlA(JIS SACM645) 2) 42CrMo(AISI 4140) 3) SKD61 Heat-treatment: Nitriding treatment Electroplated hard-chrome High-frequency quenching Spray ... , PBT, PET, PPC, PPS, PAR, PO, Magnetic powder, ceramic powder, aluminum powder, iron powder, wood flour and other engineering plastics, PVC, PE ...