... ,SS316 Process:Silica solution casting Certificate:ISO9001:20 Product Name: cast iron auto exhaust pipe castingsMaterials: grey iron, ductile iron, ... service.6. Manufacturing equipment (foundry used): cupola, electric furnace, resin-bonded, dry sand mix miller, quake press molding machine, turning ... , OD micrometer, multiple use angle mearuring tool, CMM etc. cast iron auto exhaust pipe castings