... -process casting. Our factory provides products made in both ferrous and non-ferrous alloys (grey cast iron, ductile cast iron, alloy iron, ... casting, investment casting, lost foam casting, die casting, v-process casting, closed & open die forging, and permanent mold casting. ... Such as manhole covers and frames, handwheel, valve, iron grating, flange, street bollards, drill point for piling and ...