NAICS #331 | Industries in the Primary Metal Manufacturing subsector smelt and/or refine ferrous and nonferrous metals from ore, pig or scrap, using electrometallurgical and other process metallurgical techniques. Establishments in this subsector also manufacture metal alloys and superalloys by introducing other chemical elements to pure metals. The output of smelting and refining, usually in ingot form, is used in rolling, drawing, and extruding operations to make sheet, strip, bar, rod, or wire, and in molten form to make castings and other basic metal products.
Primary manufacturing of ferrous and nonferrous metals begins with ore or concentrate as the primary input. Establishments manufacturing primary metals from ore and/or concentrate remain classified in the primary smelting, primary refining, or iron and steel mill industries regardless of the form of their output. Establishments primarily engaged in secondary smelting and/or secondary refining recover ferrous and nonferrous metals from scrap and/or dross. The output of the secondary smelting and/or secondary refining industries is limited to shapes, such as ingot or billet, that will be further processed. Recovery of metals from scrap often occurs in establishments that are primarily engaged in activities, such as rolling, drawing, extruding, or similar processes.
Excluded from the Primary Metal Manufacturing subsector are establishments primarily engaged in manufacturing ferrous and nonferrous forgings (except ferrous forgings made in steel mills) and stampings. Although forging, stamping, and casting are all methods used to make metal shapes, forging and stamping do not use molten metals and are included in Subsector 332, Fabricated Metal Product Manufacturing. Establishments primarily engaged in operating coke ovens are classified in Industry 32419, Other Petroleum and Coal Products Manufacturing.
NAICS #331111 | This U.S. industry comprises establishments primarily engaged in one or more of the following: (1) direct reduction of iron ore; (2) manufacturing pig iron in molten or solid form; (3) converting pig iron into steel; (4) making steel; (5) making steel and manufacturing shapes (e.g., bar, plate, rod, sheet, strip, wire); and (6) making steel and forming tube and pipe. Manufacturing ferroalloys (i.e., alloying elements used to improve, strengthen, or otherwise alter the characteristics of steel)--are classified in U.S. Industry 331112, Electrometallurgical Ferroalloy Product Manufacturing; and Operating coke ovens--are classified in U.S. Industry 324199, All Other Petroleum and Coal Products Manufacturing.
NAICS #33151 | This industry comprises establishments primarily engaged in pouring molten iron and steel into molds of a desired shape to made castings. Establishments in this industry purchase iron and steel made in other establishments. Establishments primarily engaged in manufacturing iron or steel castings and further manufacturing them into finished products are classified based on the specific finished product.
NAICS #331522 | This U.S. industry comprises establishments primarily engaged in introducing molten nonferrous metal (except aluminum), under high pressure, into molds to make nonferrous metal die-castings. Establishments in this industry purchase nonferrous metals made in other establishments. Manufacturing aluminum die-castings--are classified in U.S. Industry 331521, Aluminum Die-Casting Foundries; Pouring molten aluminum into molds to manufacture aluminum castings--are classified in U.S. Industry 331524, Aluminum Foundries (except Die-Casting); Pouring molten copper into molds to manufacture copper castings--are classified in U.S. Industry 331525, Copper Foundries (except Die-Casting); Pouring molten nonferrous metal (except copper and aluminum) into molds to manufacture nonferrous (except copper and aluminum) castings--are classified in U.S. Industry 331528, Other Nonferrous Foundries (except Die-Casting); and Manufacturing nonferrous die-castings and further manufacturing them into finished products--are classified based on the specific finished product.
NAICS #42393 | This industry comprises establishments primarily engaged in the merchant wholesale distribution of automotive scrap, industrial scrap, and other recyclable materials. Included in this industry are auto wreckers primarily engaged in dismantling motor vehicles for the purpose of wholesaling scrap. Dismantling motor vehicles for the purpose of selling used parts--are classified in Industry 423140, Motor Vehicle Parts (Used) Merchant Wholesalers; and Operating facilities where commingled recyclable materials, such as paper, plastics, used beverage cans, and metals are sorted into distinct categories--are classified in Industry 562920, Materials Recovery Facilities.
NAICS #54133 | This industry comprises establishments primarily engaged in applying physical laws and principles of engineering in the design, development, and utilization of machines, materials, instruments, structures, processes, and systems. The assignments undertaken by these establishments may involve any of the following activities: provision of advice, preparation of feasibility studies, preparation of preliminary and final plans and designs, provision of technical services during the construction or installation phase, inspection and evaluation of engineering projects, and related services. Planning and designing computer systems that integrate computer hardware, software, and communication technologies--are classified in U.S. Industry 541512, Computer Systems Design Services; Performing surveying and mapping services of the surface of the earth, including the sea floor,--are classified in Industry 541370, Surveying and Mapping (except Geophysical) Services; Gathering, interpreting, and mapping geophysical data--are classified in Industry 541360, Geophysical Surveying and Mapping Services; Creating and developing designs and specifications that optimize the use, value, and appearance of products--are classified in Industry 541420, Industrial Design Services; Providing advice and assistance to others on environmental issues, such as the control of environmental contamination from pollutants, toxic substances, and hazardous materials-- are classified in Industry 541620, Environmental Consulting Services; and Both the design and construction of buildings, highways, and other structures or in managing construction projects--are classified in Sector 23, Construction, according to the type of project.