The influence of heat treatment on the elastic and nonelastic parameters of internal friction of
high-chromium ferritic alloys and a-Fe has been examined. Mechanisms of the formation of
magnetoelastic and dislocation hysteresis have been investigated. Temperature ranges and temperature
and amplitude critical points connected with different damping mechanisms have been
established. Heat treatment for maximum damping capacity has been suggested, and the results
of damping capacity of about 50 steels were generalized.