Data on technological processes of thermal and chemical-thermal treatment of products made of ferrous and non-ferrous metals, modes of processing machine and tool parts, and on defect prevention are given. Recommendations are given on the choice of metal for the manufacture of thermally treated parts and on the purpose of technical specifications for them. Designed for qualified workers and can be useful to craftsmen, thermal technologists, as well as designers and mechanical technologists in everyday work when solving issues related to heat treatment.