CPV code 42940000 designates Machinery for the heat treatment of materials in the Common Procurement Vocabulary (CPV 2008), the EU classification used to describe the subject of public contracts.
42940000 sits under 42900000 (Miscellaneous general and special-purpose machinery) and groups 3 more specific sub-codes. When classifying a tender, choose the narrowest code that still covers the full subject of the contract.