Icyuma gikonjesha icyuma cyoroshye ni impfunyapfunyo yicyuma gisanzwe cyubatswe nicyuma gikonje. Yitwa kandi isahani ikonje, ikunze kwitwa isahani ikonje, kandi rimwe na rimwe yandikwa nabi nkibisahani bikonje.
Isahani ikonje ikozwe mubyuma bisanzwe bya karubone byubatswe ibyuma bishyushye, byongeye gukonjeshwa mubisahani byibyuma bitarenze 4mm.
Kubera ko kuzunguruka ku cyumba cy'ubushyuhe bidatanga urugero rwa oxyde ya fer, isahani ikonje ifite uburinganire bwiza kandi bwuzuye. Ufatanije nubuvuzi bwa annealing, imiterere yubukanishi nuburyo bukora neza biruta ibyuma bishyushye byoroshye.
Mubice byinshi, cyane cyane mubijyanye no gukora ibikoresho byo murugo, yagiye ikoreshwa buhoro buhoro gusimbuza ibyuma bishyushye byoroshye.