Icyiciro cya kabiri kitagira umuyonga wicyuma kigizwe nibice bibiri bya ferrite na austenite, niyo mpamvu izina ryibice bibiri byicyuma kitagira ibyuma.
Ibiranga: Ibikoresho byiza byubukanishi, birwanya ruswa nziza, gusudira neza, hamwe nubushyuhe bwo hejuru bwo hejuru.