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NACE 25.52: Heat treatment of metals

NACE Rev. 2.1 class. Replaces NACE Rev. 2 25.61. Closest ISIC Rev. 4: 2592.

NACE Rev. 2.1 class 25.52 is "Heat treatment of metals". It sits in section C (MANUFACTURING), then division 25 (Manufacture of fabricated metal products, except machinery and equipment), then group 25.5 (Treatment and coating of metals; machining). In the previous classification, NACE Rev. 2, the activity was covered by 25.61 (Treatment and coating of metals).

What the class includes

This class includes: - general activities for the heat treatment of metals - thermomechanical heat treatment of metals (e.g. preheating, annealing, hardening, tempering, quenching, deep freezing of metal) - thermochemical heat treatment of metals (e.g. carburising, carbonitriding, nitrocarburising, nitriding, oxidising, sulphidising, boriding)

Correspondence with NACE Rev. 2

NACE Rev. 2Label (Rev. 2)Also maps to
25.61Treatment and coating of metals2

The label in 24 languages

Neighbouring classes

25.51 Coating of metals · 25.53 Machining of metals

Use it

Convert a list of NACE Rev. 2 codes to Rev. 2.1 in your browser, or search all codes. The same data is available from the API and the MCP server.

Official classification texts from EU Vocabularies (Publications Office of the European Union, CC BY 4.0), read on 2026-10-05. Correspondence tables link classes that cover the same activities; one old class can be split across several new ones, so check the notes before you convert a dataset. Information only.