... we provide:1. casting OEM service2. CNC machining 3. material: cast iron, cast steel,aluminum,brass,alloy, etc4. ISO 9001:20085. Working process ... Machining: 3, Inspection:4, Raw Material ExportCasting1. Casting Material: Grey iron, Ductile iron, Alloy steel , Carbon Steel, Aluminum, Brass,etc2. Standard: ISO ... , we supply all the necessary assistant. 2011 sand casting CAST IRON ELBOW PIPE FITTINGS