- Blast furnaces and steel mills (4)
- Steel wire and related products (6)
- Gray and ductile iron foundries (4)
- Primary aluminum (1)
- Primary nonferrous metals, nec (1)
- Secondary nonferrous metals (2)
- Aluminum sheet, plate, and foil (1)
- Aluminum extruded products (3)
- Aluminum die-castings (1)
- Aluminum foundries (4)
- Nonferrous foundries, nec (1)
- Metal heat treating (3)
