... are made of gray iron. The materials can be choosed as the order.2. Standard: IEC, DIN, ASTM, BS, ... casting, investment casting, which are available. Machining: complete machining such as Machining center, CNC, Lathe, Milling machine, drilling etc. Surface ... , polishing, heat treatment, plating or galvanization etc.6. Size and Design* As the order7. Inspection* OEM gray iron motor housing castings ...