... kinds of investment castings per your drawings and samples. investment casting partFeatures:1) Process: a) Silica sol shelling-making process b ... and alloy steel: ASTM 415-205, 80-40, LCA, CB, LCC, WCA, WCB 3) Quality control: a) Fast intermediate frequency furnace ... lathes, milling, drilling, planning, grinding machines and testing facilities Investment Casting Part