... iron tractor partsMaterial: gray iron, ductile ironProcess: sand casting,lost foam casting and vacuum castingStandard: GB ,GOST ,DIN ,JISWeight ... equipments: CNC machining center ,Milling, Drilling,CNC turning machine,ect(4)Testing equipments: Metallurgical Microscope equipment, Ultrasonic flaw ... SpectrometerVisible Spectrophotometer,ect(5) ISO9001:2008 quality control casting gray iron tractor part