| 331110 |
Ferrotitanium manufacturing |
| 331110 |
Ferrotungsten manufacturing |
| 331110 |
Ferrovanadium manufacturing |
| 331110 |
Flakes, iron or steel, made in iron and steel mills |
| 331110 |
Flats, iron or steel, made in iron and steel mills |
| 331110 |
Forgings, iron or steel, made in iron and steel mills |
| 331110 |
Frogs, iron or steel, made in iron and steel mills |
| 331110 |
Galvanizing metals and metal formed products made in iron and steel mills |
| 331110 |
Gun forgings made in iron and steel mills |
| 331110 |
High percentage nonferrous alloying elements (i.e., ferroalloys) manufacturing |