... parts castings are made of gray iron. The materials can be choosed as the order.2. Standard: IEC, DIN, ASTM, BS, JIS ... gray iron motor parts castings are sand casting. The green sand casting, resin bonded casting, compression casting, investment casting, which ... treatment, plating or galvanization etc.6. Size and Design* As the order7. Inspection* OEM gray iron motor housing castings will be ...