| | | 3311 | Iron and Steel Mills and
Ferroalloy Manufacturing | Y | | | | Primary Metal
Manufacturing 331 | Manufacturing 33 |
| | | 3312 | Steel Product
Manufacturing from
Purchased Steel | | | | | Primary Metal
Manufacturing 331 | Manufacturing 33 |
| | | 3313 | Alumina and Aluminum
Production and Processing | Y | | | | Primary Metal
Manufacturing 331 | Manufacturing 33 |
| | | 3314 | Nonferrous Metal (except
Aluminum) Production and
Processing | | | | | Primary Metal
Manufacturing 331 | Manufacturing 33 |
| | | 3315 | Foundries | Y | | | | Primary Metal
Manufacturing 331 | Manufacturing 33 |
