Industry: 3398—Metal Heat Treating
Establishments primarily engaged in heat treating of metal for the trade.

Annealing of metal for the tradeHeat treating of metal for the trade
Brazing (hardening) metal for the tradeShot peening—treating steel to reduce fatigue
Burning metal for the tradeStainless steel, brazing (hardening) for the trade
Hardening of metal for the tradeTempering of metal for the trade
Codes Titles Total Marketable US Businesses
3398Metal Heat Treating727
339800Metal heat treating633
33980000Metal heat treating633
339899Metal heat treating, nec94
33989901Annealing of metal17
33989902Brazing (hardening) of metal40
33989903Metal burning5
33989904Shot peening (treating steel to reduce fatigue)21
33989905Tempering of metal11