2017 NAICS Definition

T = Canadian, Mexican, and United States industries are comparable.

331110 Iron and Steel Mills and Ferroalloy Manufacturing

This 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); (6) making steel and forming pipe and tube; and (7) manufacturing electrometallurgical ferroalloys. Ferroalloys add critical elements, such as silicon and manganese for carbon steel and chromium, vanadium, tungsten, titanium, and molybdenum for low- and high-alloy metals. Ferroalloys include iron-rich alloys and more pure forms of elements added during the steel manufacturing process that alter or improve the characteristics of the metal.

Cross-References. Establishments primarily engaged in--
  • Operating coke ovens--are classified in U.S. Industry 324199, All Other Petroleum and Coal Products Manufacturing;
  • Manufacturing nonferrous superalloys, such as cobalt or nickel-based superalloys--are classified in U.S. Industry 331492, Secondary Smelting, Refining, and Alloying of Nonferrous Metal (except Copper and Aluminum);
  • Manufacturing concrete reinforcing bar by rolling and drawing steel from purchased steel--are classified in U.S. Industry 331221, Rolled Steel Shape Manufacturing; and
  • Manufacturing fabricated structural metal products from concrete reinforcing bars and fabricated bar joists--are classified in U.S. Industry 332312, Fabricated Structural Metal Manufacturing.
2007
NAICS		   2012
NAICS		   2017
NAICS		   Corresponding Index
Entries
331111   331110   331110   Armor plate made in iron and steel mills
331111   331110   331110   Axles, rolled or forged, made in iron and steel mills
331111   331110   331110   Balls, steel, made in iron and steel mills
331111   331110   331110   Bars, concrete reinforcing (rebar) made in steel mills
331111   331110   331110   Bars, iron, made in iron and steel mills
331111   331110   331110   Bars, steel, made in iron and steel mills
331111   331110   331110   Billets, steel, made in iron and steel mills
331111   331110   331110   Blackplate made in iron and steel mills
331111   331110   331110   Blast furnaces
331111   331110   331110   Blooms, steel, made in iron and steel mills
331111   331110   331110   Car wheels, rolled steel, made in iron and steel mills
331111   331110   331110   Coke oven products made in iron and steel mills
331111   331110   331110   Concrete reinforcing bar (rebar) made in iron and steel mills
331111   331110   331110   Direct reduction of iron ore
331112   331110   331110   Electrometallurgical ferroalloy manufacturing
331111   331110   331110   Electrometallurgical steel manufacturing
331111   331110   331110   Fence posts, iron or steel, made in iron and steel mills
331112   331110   331110   Ferroalloys manufacturing
331112   331110   331110   Ferrochromium manufacturing
331112   331110   331110   Ferromanganese manufacturing
331112   331110   331110   Ferromolybdenum manufacturing
331112   331110   331110   Ferrophosphorus manufacturing
331112   331110   331110   Ferrosilicon manufacturing
331112   331110   331110   Ferrotitanium manufacturing
331112   331110   331110   Ferrotungsten manufacturing
331112   331110   331110   Ferrovanadium manufacturing
331111   331110   331110   Flakes, iron or steel, made in iron and steel mills
331111   331110   331110   Flats, iron or steel, made in iron and steel mills
331111   331110   331110   Forgings, iron or steel, made in iron and steel mills
331111   331110   331110   Frogs, iron or steel, made in iron and steel mills
331111   331110   331110   Galvanizing metals and metal formed products made in iron and steel mills
331111   331110   331110   Gun forgings made in iron and steel mills
331112   331110   331110   High percentage nonferrous alloying elements (i.e., ferroalloys) manufacturing
331111   331110   331110   Hoops made in iron and steel mills
331111   331110   331110   Hoops, galvanized, made in iron and steel mills
331111   331110   331110   Hot-rolling iron or steel products in iron and steel mills
331111   331110   331110   Ingot made in iron and steel mills
331111   331110   331110   Iron ore recovery from open hearth slag
331111   331110   331110   Iron sinter made in iron and steel mills
331111   331110   331110   Iron, pig, manufacturing
331112   331110   331110   Manganese metal ferroalloys manufacturing
331111   331110   331110   Mesh, wire, made in iron and steel mills
331111   331110   331110   Mini-mills, steel
331112   331110   331110   Molybdenum silicon ferroalloys manufacturing
331111   331110   331110   Nut rods, iron or steel, made in iron and steel mills
331111   331110   331110   Paste, iron or steel, made in iron and steel mills
331111   331110   331110   Pig iron manufacturing
331111   331110   331110   Pilings, iron or steel plain sheet, made in iron and steel mills
331111   331110   331110   Pipe, iron or steel, made in iron and steel mills
331111   331110   331110   Plate, iron or steel, made in iron and steel mills
331111   331110   331110   Powder, iron or steel, made in iron and steel mills
331111   331110   331110   Rail joints and fastenings made in iron and steel mills
331111   331110   331110   Railroad crossings, iron or steel, made in iron and steel mills
331111   331110   331110   Rails rerolled or renewed in iron and steel mills
331111   331110   331110   Rails, iron or steel, made in iron and steel mills
331111   331110   331110   Rods, iron or steel, made in iron and steel mills
331111   331110   331110   Rounds, tube, steel, made in iron and steel mills
331111   331110   331110   Sheet pilings, plain, iron or steel, made in iron and steel mills
331111   331110   331110   Sheets, steel, made in iron and steel mills
331111   331110   331110   Shell slugs, steel, made in iron and steel mills
331112   331110   331110   Silicomanganese ferroalloys manufacturing
331111   331110   331110   Skelp, iron or steel, made in iron and steel mills
331111   331110   331110   Slab, steel, made in iron and steel mills
331112   331110   331110   Spiegeleisen ferroalloys manufacturing
331111   331110   331110   Spike rods made in iron and steel mills
331111   331110   331110   Sponge iron
331111   331110   331110   Stainless steel made in iron and steel mills
331111   331110   331110   Steel balls made in iron and steel mills
331111   331110   331110   Steel manufacturing
331111   331110   331110   Steel mill products (e.g., bar, plate, rod, sheet, structural shapes) manufacturing
331111   331110   331110   Steel mills
331111   331110   331110   Steel, from pig iron, manufacturing
331111   331110   331110   Strip, galvanized iron or steel, made in iron and steel mills
331111   331110   331110   Strip, iron or steel, made in iron and steel mills
331111   331110   331110   Structural shapes, iron or steel, made in iron and steel mills
331111   331110   331110   Superalloys, iron or steel, manufacturing
331111   331110   331110   Template, made in iron and steel mills, manufacturing
331111   331110   331110   Terneplate made in iron and steel mills
331111   331110   331110   Ternes, iron or steel, long or short, made in iron and steel mills
331111   331110   331110   Tie plates, iron or steel, made in iron and steel mills
331111   331110   331110   Tin-free steel made in iron and steel mills
331111   331110   331110   Tinplate made in iron and steel mills
331111   331110   331110   Tool steel made in iron and steel mills
331111   331110   331110   Tube rounds, iron or steel, made in iron and steel mills
331111   331110   331110   Tube, iron or steel, made in iron and steel mills
331111   331110   331110   Tubing, seamless steel, made in iron and steel mills
331111   331110   331110   Tubing, wrought iron or steel, made in iron and steel mills
331111   331110   331110   Well casings, iron or steel, made in iron and steel mills
331111   331110   331110   Wheels, car and locomotive, iron or steel, made in iron and steel mills
331111   331110   331110   Wire products, iron or steel, made in iron and steel mills
331111   331110   331110   Wrought iron or steel pipe and tubing made in iron and steel mills