... such as C45,20CrMnTi,40Cr,42CrMo 2. High precision 3.Small gear Module 0.8,Teeth 16, Small gear with drawing, The drawing as ... Tempered Steel, Cast Iron, Aluminum, Copper, Brass and so on 2. Heat Treatment: Hardening and Tempering, High Frequency Quenching, Carburizing Quenching ... , Sand-blasting and so on according to ROHS demand. 4. Inspection: All items are checked and tested thorouhgly during every ...