... casting/sand casting/ CNC machining DescriptionCNC machining process with sand castingMaterial Cast iron, grey iron, ductile iron ... , cast steel ,aluminumCertificationStandardISO9001:2008ASTM,JIS,GB,AISI,DIN,etcSurface TreatmentZinc,heat-treatment,powder,nickel,chrome,sliver,polishing ... the foundry, and in the meanwhile work together with many good foundries producing steel castings, stainless steel ...