1) 15 years' production experience 2) mining machinery casting part 3) various materials 4) ISO9001- ... and chemical components according to your request.Investment casting for mining machinery part1.Material: carbon steel, alloy steel, stainless steel ... milling, drilling, grinding, threading, CNC machining, etc.5.Finishing: sand blasting, polishing, plating, acid treatment, anodizing, painting and PVC ...