... Handle Ductile Iron Sand Casting Process Machined by NC Machine and Drilling Machine Checked by plug gauge Valve HandleGrey Iron,Ductile IronSand Casting ProcessMachined ... Steel, Ductile Iron, Grey Iron, Copper, Aluminum Bronze, Malleable Iron etc.2) Process: Investment Casting, Sand Casting (Resin Sand Casting, Green Sand Casting), Permanent Casting, Die Casting, Centrifugal Casting, Forging and ...