1.grey iron, ductile iron, iron alloy 2.hardness: 140HB- ... Group(now the SAIC) to supply the professional cast iron auto parts. Stuff of 500 people, annual production more ... Hydraulic pressure and pneumatic parts field: valve, fairlead, gear wheel and piston;2. Machine tool parts: sea saw, ... 5. Mould fields: glass mould, plastic mould, grinding wheel mould and die-casting mould etc.6. Car components ...