... ,ductile iron,etc 2 resin coated sand casting 3 Certificate:ISO 9001:2000 coated sand casting Detailed Product DescriptionMaterial: ... carbon steel, gray iron, ductile iron, etc· resin coated sand casting· Certificate:ISO 9001:2000· Professional Service· OEM ... punching machines laser carving machineSurface treatmentHeat treatment, Polishing, Sand blasting, Painting, Electro-plating, Chemical Plating, ...