- Blast furnaces and steel mills (3)
- Steel wire and related products (2)
- Steel pipe and tubes (1)
- Gray and ductile iron foundries (1)
- Steel investment foundries (1)
- Primary nonferrous metals, nec (2)
- Secondary nonferrous metals (1)
- Aluminum sheet, plate, and foil (2)
- Nonferrous rolling and drawing, nec (1)
- Aluminum foundries (1)
- Copper foundries (1)
- Primary metal products (1)
