Industry: 3398—Metal Heat Treating
Establishments primarily engaged in heat treating of metal for the trade.
| Annealing of metal for the trade | Heat treating of metal for the trade |
| Brazing (hardening) metal for the trade | Shot peening—treating steel to reduce fatigue |
| Burning metal for the trade | Stainless steel, brazing (hardening) for the trade |
| Hardening of metal for the trade | Tempering of metal for the trade |
| Codes |
Titles | Total Marketable US Businesses |
| 33980000 | Metal heat treating | 629 |
| 33989901 | Annealing of metal | 26 |
| 33989902 | Brazing (hardening) of metal | 56 |
| 33989903 | Metal burning | 6 |
| 33989904 | Shot peening (treating steel to reduce fatigue) | 47 |
| 33989905 | Tempering of metal | 12 |
