Establishments primarily engaged in manufacturing refractories and crucibles made of materials other than clay. This industry includes establishments primarily engaged in manufacturing all graphite refractories, whether of carbon bond or ceramic bond. Establishments primarily engaged in manufacturing clay refractories are classified in Industry 3255.
- Alumina fused refractories
- Brick, bauxite
- Brick, carbon
- Brick, refractory: chrome, magnesite, silica, and other nonclay
- Brick, silicon carbide
- Castable refractories, nonclay
- Cement, magnesia
- Cement: high temperature, refractory (nonclay)
- Crucibles: graphite, magnesite, chrome, silica, or other non-clay
- Dolomite and dolomite-magnesite brick
- Cunning mixes, nonclay
- High temperature mortar, nonclay
- Hot top refractories, nonclay
- Nonclay refractories
- Plastics refractories, nonclay
- Pyrolytic graphite
- Ramming mixes, nonclay
- Refractories, castable: nonclay
- Refractories, graphite: carbon bond or ceramic bond
- Refractory cement, nonclay
- Retorts, graphite