The machinability has been considered of the following variety of alloys and steels: tool steels (7-11KhF, 13Kh, KhVCh, V2F, 9Kh1, Kh, 12Kh1, 9Kh3, KhGS, 7Kh3, 8Kh3, 5KhGM, 5KhNV; Kh12, Kh12M, Kh12V, Kh12F, Kh12VM, 3KhG135F, 4KhG135F); structural steels, stainless, high corrosion-resistant, heat resistant (Kh20N80, Kh15N60, KhN78T); high refractory (KhN36VT, KhN36VTYu, KhN77TYu, KhN77TYuP); chromium-aluminium alloys; magnetic-soft alloys; whrought magnetic hard alloys; amorphous ferrous magnetic alloys, high-Mn and high-carbon alloys.