... ISO9001:20 Product Name: cast iron auto exhaust pipe castingsMaterials: grey iron, ductile iron, malleable iron,heat resistant iron, carbon steel, stainless steel ... CAD, Solid work, JPG, Proe- Standard: ASTM, AISI, BS, DIN, JIS, NF Main production equipments: Wax injection, CNC ... steel sand casting process in Ningbo, China ( Valve Casting / Casting valve / ball Valves)3. Size: According to the drawing ...