 A reusable pattern allows for higher production rates, while the disposable molds enable complex geometries to be cast.Shell mold casting requires the use of a metal pattern, oven, sand-resin mixture, dump box, and molten metal.Shell mold casting allows the use of both ferrous and non-ferrous metals, most commonly using cast iron, carbon steel, alloy steel, stainless steel, aluminum alloys, and copper alloys.