... Material: carbon steel as C45, 20CrMnTi, 40Cr, 42CrMo, stainless steel, nylon Heat Treatment Industry sprocket Material: carbon steel as C45, 20CrMnTi, 40Cr ... , 42CrMo, stainless steel, nylon Heat Treatment: Hardening and Tempering, High Frequency Quenching, Carburizing QuenchingProcess: Investment ...