This Annual Survey of Manufactures (ASM) rollup industry comprises establishments primarily engaged in the following North American Industry Classification System (NAICS) U.S. industries:

1. 331111 Iron and Steel Mills and
2. 331112 Electrometallurgical Ferroalloy Product Manufacturing.

331111 Iron and Steel Mills

This U.S. industry comprises establishments primarily engaged in one or more of the following manufacturing activities:

1. direct reduction of iron ore;
2. pig iron in molten or solid form;
3. converting pig iron into steel;
4. making steel;
5. making steel and shapes (e.g., bar, plate, rod, sheet, strip, wire); and
6. making steel and forming tube and pipe.

331112 Electrometallurgical Ferroalloy Product Manufacturing

This U.S. industry comprises establishments primarily engaged in 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 being made.