... .CNC machining3.material :ductile iron,grey iron,stainless steel,carbon steel,aluminum, brass,etc.4.working process:sand casting,investment casting, die casting, forging,stamping,etc ... , Machining: 3, Inspection:4, Raw Material ExportCasting1. Casting Material: Grey iron, Ductile iron, Alloy steel , Carbon Steel, Aluminum, Brass,etc2. Standard: ISO 9001:20083 ...