... casting pattern making 1) Iron Casting Material: cast iron,ductile iron, cast steel,grey iron 2) Process:sand casting Features of our OEM sand casting ... ductile iron, cast steel,grey iron2) Process:sand casting , shelly casting.3) We can do with precise machine4) OEM ... 1) Machinery properties and Chemical components testing after raw casting(2) Hardness checking after heat treatment(3) Dimensions ...