... machinery casting part 3) various materials 4) ISO9001-2000 5) OEM is welcome Ningbo COSZO Industry & Trade Co., Ltd. is a professional casting ,machining ... , gray iron, nodular cast iron, ductile Iron or specified2.Standard: ASTM, AISI, BS, DIN, JIS, NF3.Process: investment casting, die casting, gravity casting, sand casting4.Machining: turning ...