NAICS 332811 — Metal Heat Treating 
BEA sector: Coating, engraving, heat treating and allied activities
Activity: Annealing metals and metal products for the trade
Activity: Brazing (i.e., hardening) metals and metal products for the trade
Activity: Burning metals and metal products for the trade
Activity: Hardening (i.e., heat treating) metals and metal products for the trade
Activity: Heat treating metals and metal products for the trade
Activity: Shot peening metal and metal products for the trade
Activity: Tempering metals and metal products for the trade