C21D - CPC Classification
Classification description:
Sub-classes:
- C21D1/00 » General methods or devices for heat treatments, e.g. annealing, hardening, quenching, tempering 117
- C21D10/00 » Modifying the physical properties by methods other than heat treatment or deformation 139
- C21D11/00 » Process control or regulation for heat treatments 302
- C21D2201/00 » Treatment for obtaining particular effects 49
- C21D2211/00 » Microstructure comprising significant phases 20
- C21D2221/00 » Treating localised areas of an article 378
- C21D2241/00 » Treatments in a special environment 32
- C21D2251/00 » Treating composite or clad material 44
- C21D2261/00 » Machining or cutting being involved 135
- C21D2281/00 » Making use of special physico-chemical means 10
- C21D3/00 » Diffusion processes for extraction of non-metals; Furnaces therefor 2
- C21D5/00 » Heat treatments of cast-iron 107
- C21D6/00 » Heat treatment of ferrous alloys 262
- C21D7/00 » Modifying the physical properties of iron or steel by deformation 66
- C21D8/00 » Modifying the physical properties by deformation combined with, or followed by, heat treatment 123
- C21D9/00 » Heat treatment, e.g. annealing, hardening, quenching, tempering, adapted for particular articles; Furnaces therefor 214
