Establishments primarily engaged in manufacturing ferro and nonferrous metal additive alloys by electrometallurgical or metallothermic processes, including high percentage ferroalloys and high percentage nonferrous additive alloys. Establishments primarily engaged in manufacturing electrometallurgical steel are classified in Industry 3312.
- Additive alloys, except copper
- Ferroalloys (including high percentage)
- Ferrochromium
- Ferromanganese
- Ferromolybdenum
- Ferrophosphorus
- Ferrosilicon
- Ferrotitanium
- Ferrotungsten
- Ferrovanadium
- High percentage ferroalloys
- Manganese metal
- Molybdenum silicon
- Nonferrous additive alloys, high percentage: except copper
- Spiegeleisen
- Tungsten carbide powder by metallurgical process