|Designation GOST Cyrillic||18ХНВА|
|Designation GOST Latin||18XHBA|
|By chemical elements||18CrНW|
Steel 18ХНВА usedin aircraft manufacturing, the case hardening state, for the manufacture of rotor shafts, crank shafts, gear shafts, gear) and narimanovna responsible of bolts, studs and other special fasteners.
Steel martensitic class, has a good prikalivaet and quenched into martensite even under large cross-sections of workpieces. Cementation of parts is carried out at a temperature of 900−920 °C. In the diagram of isothermal transformation of austenite steel 18ХНВА missing area perlito-tristango decay. The austenite decomposes or needle trostet, or martensite. Softening treatment for this steel is the high vacation at 650−670°. Structure after a heat treatment -sorbitol with carbides.