... 5.Inspected by CMM Cast aluminum pistons were used to many areas of industry, covered Metalforming, Mining, Material handling, Oilfields and the ... more. Material are Alloy Gray Iron(C-1362/C-1500),Ductile Iron (80-55-06/100-70-03), Cast Aluminum(356-T6 ... .Mature foundry technique Strictly control the chemical composition and mechanical properties through our lab--- Machining: We machine all the parts ...