| Naics index | Naics index description |
|---|---|
| 331110 | Direct reduction of iron ore |
| 331110 | Electrometallurgical ferroalloy manufacturing |
| 331110 | Electrometallurgical steel manufacturing |
| 331110 | Fence posts, iron or steel, made in iron and steel mills |
| 331110 | Ferroalloys manufacturing |
| 331110 | Ferrochromium manufacturing |
| 331110 | Ferromanganese manufacturing |
| 331110 | Ferromolybdenum manufacturing |
| 331110 | Ferrophosphorus manufacturing |
| 331110 | Ferrosilicon manufacturing |