The principal feature of the method of high-frequency induction heating is the reduction in the treatment time owing to the acceleration of the processes occurring in the alloys when heated, and the possibility of attaining any temperature. A number of specific features of induction heating are important for diffusion saturation: Firstly, the component may be heated just to the necessary depth,·without.affecti:ng the main body of the metal to which optimum structure and properties maybe imparted by preliminary treatment; secondly, owing to the high temperature and short holding time, the surface of the metal base may be saturated to the maximum degree, which cannot be done in a furnace since, as the result. of diffusion, the alloy layer spreads and its concentration is diminished. The investigation was carried out uSing the GZ-46 high-frequency apparatus with a 40KVA, 500-kc tube oscillator. The materials used for the investigations were armco iron, carbon steel (0.64%0) and steel 38KhMA. Saturation was carried out with chromium, aluminum, silicon, tungsten, molybdenum, boron, and also with titanium, followed byboriding. The specimens subjected to investigation had a diameter of 7 mm and a length of 10~15 mm with a machine-finished surface. The specimens were degreaSed before saturation.