I-Ductile iron ayiyona into eyodwa kodwa iyingxenye yeqoqo lezinto ezingakhiqizwa ukuze zibe nezinhlobonhlobo zezakhiwo ngokulawula i-microstructure. Isici esivamile esichaza leli qembu lezinto zokwakha ukuma kwegraphite. Kuma-ayina ama-ductile, i-graphite isesimweni samaqhuqhuva esikhundleni sama-flakes njengoba isensimbi empunga. Ukuma okucijile kwama-flakes e-graphite kudala amaphuzu okugxilisa ingcindezi ngaphakathi kwe-matrix yensimbi kanye nesimo esiyindilinga samaqhuqhuva sibe sincane kakhulu, ngaleyo ndlela kuvinjwe ukudalwa kwemifantu futhi kunikeze i-ductility ethuthukisiwe enikeza ingxubevange igama layo. Ukwakheka kwamaqhuqhuva kufezwa ngokungezwa kwezakhi eziguquguqukayo, ngokuvamile i-magnesium (inothi i-magnesium ibilisa ku-1100 ° C futhi insimbi iyancibilika ku-1500 ° C) futhi, kancane kancane manje, i-cerium (imvamisa isesimweni se-Mischmetal). I-Tellurium nayo isetshenzisiwe. I-Yttrium, evame ukuba yingxenye ye-Misch metal, nayo iye yacutshungulwa njenge-nodulizer engenzeka.
