Umuyoboro w'icyuma wa Nodular ni umuyoboro w'icyuma uhindagurika, ufite ishingiro ry'icyuma n'imiterere y'ibyuma, bityo izina ryabo. Graphite mu miyoboro ya fer ihindagurika ibaho muburyo bwa serefegitura, hamwe nubunini rusange bwamanota 6-7. Ku bijyanye n’ubuziranenge, urwego rwa spheroidisation yimiyoboro yicyuma isabwa kugenzurwa kurwego rwa 1-3, hamwe na spheroidisation ya 80%. Kubwibyo, imiterere yubukanishi bwibikoresho ubwabyo byatejwe imbere, bifite ishingiro ryibyuma nibiranga ibyuma. Nyuma yo gufatana runini, microstructure yimiyoboro yicyuma ihindagurika ni ferrite hamwe na pearlite nkeya, ifite imiterere yubukanishi, niyo mpamvu nanone yitwa imiyoboro yicyuma.