... sand cast method: aluminum, brass, bronze, carbon steel, stainless steel, and irons both gray and ductile to name a ... out of wood (low volume), repro plastic (poured off of master wood pattern) & machined metal match plate ... need to be made of Aluminum, Brass, Bronze, Steel Alloys, Ductile Iron, Grey Iron & Zinc. Typically ... is completed.Process Chart: Precision Stainless Steel Investment Casting Parts