... investment casting/sand casting/ CNC machining DescriptionCNC machining process with sand castingMaterial Cast iron, grey iron, ductile iron, ... TreatmentZinc,heat-treatment,powder,nickel,chrome,sliver,polishing,T4,T6,etcEquipmentsPressing machine,Wire-electrode cutting,Shot blasting, ... the foundry, and in the meanwhile work together with many good foundries producing steel castings, stainless steel ...