31-33 Manufacturing

331511 Iron Foundries

This industry comprises establishments primarily engaged in pouring molten pig iron or iron alloys into molds to manufacture castings (e.g., cast iron manhole covers, cast iron pipe, cast iron skillets). Establishments in this industry purchase iron made in other establishments.

Establishments primarily engaged in manufacturing iron castings and further manufacturing them into finished products are classified based on the specific finished product.

331512 Steel Investment Foundries

This industry comprises 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.

Manufacturing steel castings (except steel investment castings) are classified in U.S. Industry 331513, Steel Foundries (except Investment).

Manufacturing steel investment castings and further manufacturing them into finished products are classified based on the specific finished product.

331513 Steel Foundries

This industry comprises establishments primarily engaged in manufacturing steel castings (except steel investment castings). Establishments in this industry purchase steel made in other establishments.

Manufacturing steel investment castings are classified in U.S. Industry 331512, Steel Investment Foundries.

Manufacturing steel castings and further manufacturing them into finished products are classified based on the specific finished product.

331523 Nonferrous Metal Die-Casting Foundries

This industry comprises establishments primarily engaged in introducing molten nonferrous metal, under high pressure, into molds or dies to make nonferrous metal die-castings. Establishments in this industry purchase nonferrous metals made in other establishments.

Pouring molten aluminum into molds to manufacture aluminum castings are classified in U.S. Industry 331524, Aluminum Foundries (except Die-Casting);

Pouring molten nonferrous metal (except aluminum) into molds to manufacture nonferrous (except aluminum) castings are classified in U.S. Industry 331529, Other Nonferrous Metal Foundries (except Die-Casting).

Manufacturing nonferrous die-castings and further manufacturing them into finished products are classified based on the specific finished product.

331524 Aluminum Foundries

This industry comprises 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.

Manufacturing aluminum die-castings are classified in U.S. Industry 331523, Nonferrous Metal Die-Casting Foundries.

Manufacturing aluminum or aluminum alloy castings and further manufacturing them into finished products are classified based on the specific finished product.

331529 Other Nonferrous Metal Foundries

This industry comprises 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.

Manufacturing nonferrous die-castings are classified in U.S. Industry 331523, Nonferrous Metal Die-Casting Foundries;

Pouring molten aluminum into molds to manufacture aluminum castings are classified in U.S. Industry 331524, Aluminum Foundries (except Die-Casting).

Manufacturing nonferrous castings and further manufacturing them into finished products are classified based on the specific finished product.