... 2.CNC machining 3.ISO901:2008 4.cast iron pipe fittings 5.sand casting pipe fittings ... . casting OEM service2. CNC machining 3. material: cast iron, cast steel,aluminum,brass,alloy, etc4. ISO 9001:20085 ... Inspection:4, Raw Material ExportCasting1. Casting Material: Grey iron, Ductile iron, Alloy steel , Carbon Steel, Aluminum, Brass,etc2. ... assistant. 2011 sand casting CAST IRON ELBOW PIPE FITTINGS