- Blast furnaces and steel mills (3)
- Cold finishing of steel shapes (1)
- Steel pipe and tubes (4)
- Malleable iron foundries (1)
- Steel foundries, nec (1)
- Primary nonferrous metals, nec (2)
- Secondary nonferrous metals (3)
- Nonferrous wiredrawing and insulating (1)
- Aluminum foundries (3)
- Copper foundries (1)
- Nonferrous foundries, nec (3)
- Metal heat treating (1)
- Primary metal products (1)
