I-Ductile iron ayiyona nto enye kodwa iyinxalenye yeqela lezinto ezinokuveliswa ukuba zibe noluhlu olubanzi lweepropati ngokulawulwa kwe-microstructure. Uphawu oluqhelekileyo lweli qela lezinto eziphathekayo yimilo yegraphite. Kwiintsimbi ze-ductile, i-graphite ikwimo ye-nodules kunokuba i-flakes njengoko i-iron engwevu. Imilo ebukhali yeeflakes zegraphite zenza amanqaku oxinzelelo ngaphakathi kwe-matrix yesinyithi kunye nokumila okungqukuva kwamaqhuqhuva angaphantsi kangako, ngaloo ndlela kuthintela ukudalwa kweentanda kunye nokubonelela nge-ductility eyandisiweyo enika i-alloy igama layo. Ukubunjwa kwamaqhuqhuva kufezekiswa ngokudityaniswa kwezinto ezinoduli, ngokuqhelekileyo i-magnesium (qaphela i-magnesium ibilisa kwi-1100 ° C kunye ne-iron iyancibilika kwi-1500 ° C) kwaye, ngokuncinci ngoku, i-cerium (ngokuqhelekileyo ikwimo ye-Mischmetal). I-Tellurium nayo isetyenzisiwe. I-Yttrium, ehlala iyinxalenye ye-Misch metal, nayo ifundwe njenge-nodulizer enokwenzeka.
