DDM SYSTEMS, INC.

Steel Investment Foundries

This includes establishments primarily engaged in manufacturing steel investment castings. Investment molds are formed by covering a wax shape with a refractory slurry. After the refractory slurry hardens, the wax is melted, leaving a seamless mold. Investment molds provide highly detailed, consistent castings. Establishments in this industry purchase steel made in other establishments.

Aluminum Foundries (except Die-Casting)

This includes establishments primarily engaged in pouring molten aluminum into molds to manufacture aluminum castings (except nonferrous die-castings). Establishments in this industry purchase aluminum made in other establishments.

Other Nonferrous Metal Foundries (except Die-Casting)

This includes establishments primarily engaged in pouring molten nonferrous metals (except aluminum) into molds to manufacture nonferrous castings (except nonferrous die-castings and aluminum castings). Establishments in this industry purchase nonferrous metals, such as copper, nickel, lead, and zinc, made in other establishments.

Powder Metallurgy Part Manufacturing

This includes establishments primarily engaged in manufacturing powder metallurgy products using any of the various powder metallurgy processing techniques, such as pressing and sintering or metal injection molding. Establishments in this industry generally make a wide range of parts on a job or order basis.

Industrial Mold Manufacturing

This includes establishments primarily engaged in manufacturing industrial molds for casting metals or forming other materials, such as plastics, glass, or rubber.