... Iron, Ductile Iron, Malleable Iron, Stainless Steel, Carbon, Steel, Aluminum ,Brass, BronzeClay Sand INVESTMENTSilica SolStainless Steel, Carbon Steel, Special Alloy Steel ... Steel (carbon castings; allow castings; stainless steel castings)3.cast Brass (Brass castings and Bronze castings)4.cast Aluminum (ASTM A 356T6 ...