2017 Edition

national industry 332811

Metal Heat Treating


This U.S. industry comprises establishments primarily engaged in heat treating, such as annealing, tempering, and brazing, and cryogenically treating metals and metal products for the trade.

The immediate parent of national industry 332811 is international industry 33281: Coating, Engraving, Heat Treating, and Allied Activities

2017 NAICS Edition Cross References

  • Establishments primarily engaged in both fabricating and heat treating metal products are classified in the Manufacturing sector according to the product made.


The NAICS editions in which this code was present are indicated below. In the event that a code was changed from the prior edition the equivalent value in that edition is provided for reference.

Edition Value
2002 332811 -
2007 332811 -
2012 332811 -
2017 332811 -

Standard Industrial Classification (SIC) Mappings

  1. 3398 - Metal Heat Treating

Insurance Industry Mappings

The US Property and Casualty Insurance Industry may use the following classification descriptions which might encompass national industry 332811, Metal Heat Treating:

  1. brazing welding cutting
  2. coating engraving heat treating and allied activity
  3. coppersmith shop
  4. cutting welding brazing
  5. fabricated metal product manufacturing
  6. heat treating metal
  7. heat treating metal by electrical induction process mi
  8. manufacturing
  9. metal heat processing
  10. metal heat processing not otherwise classified
  11. metal heat treating
  12. metal product manufacturing heavy not otherwise classified
  13. metal product manufacturing light
  14. metal product manufacturing light not otherwise classified
  15. welding cutting brazing
  16. welding cutting brazing no explosion exposure no off premises
  17. welding cutting brazing no explosion exposure with off premises welding


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