... alloy steel, aluminium, copper, bronze,brass, etc5.Application:Valve parts6:Workcraft :Precision casting, sandcasting, investment casting,forging,CNC ... equipment(foundry shop used): numerical control lathe,vertical type CNC machining center, boring machine, universal miller,vertical ... casting(2)Hardness checking after heat treatment(3)Dimensions testing after maching(4)drawings→mould making→raw ...