Iron simintin gyare-gyare wani nau'in simintin ƙarfe ne mai ƙarfi wanda aka haɓaka a cikin 1950s.Cikakken aikin sa yana kusa da karfe.Ya dogara ne akan kyakkyawan aikin da aka yi amfani da shi don yin amfani da shi don jefa wasu sassa tare da hadaddun ƙarfi, ƙarfin ƙarfi, tauri da juriya.Iron ƙwanƙwasa ya ɓullo da sauri zuwa simintin ƙarfe da ake amfani da shi sosai na biyu sai baƙin ƙarfe mai launin toka.Abin da ake kira "karfe maimakon karfe", galibi yana nufin baƙin ƙarfe ductile.

Iron Ducular shine graphite mai siffar zobe ta hanyar spherulation da maganin gestation, wanda ke inganta ingantaccen kayan aikin ƙarfe na simintin ƙarfe, musamman filastik da tauri, don samun ƙarfi sama da carbon karfe.

Simintin simintin gyare-gyare shine abun ciki na carbon fiye da 2.11% na ƙarfe carbon alloy, ta hanyar ƙarfe na alade na masana'antu, ƙyallen ƙarfe da kayan gami da kayan haɗin gwiwa bayan narkewar zafin jiki da haɓakar simintin gyare-gyare, ban da Fe, carbon da sauran simintin ƙarfe a cikin nau'in graphite, idan hazo na graphite tsiri na simintin ƙarfe da ake kira baƙin ƙarfe launin toka ko launin toka simintin ƙarfe, ƙarfen simintin tsutsotsi da ake kira baƙin ƙarfe tsutsa, ƙungiyar simintin ƙarfe da ake kira farin simintin ƙarfe ko ƙarfe baƙin ƙarfe, kuma ƙarfen simintin simintin simintin ana kiransa ƙarfe simintin simintin siminti.

A sinadaran abun da ke ciki na ductile baƙin ƙarfe ban da baƙin ƙarfe ne yawanci: carbon abun ciki 3.0 ~ 4.0%, silicon abun ciki 1.8 ~ 3.2%, manganese, phosphorus, sulfur total ba wuce 3.0% da kuma dace adadin m ƙasa, magnesium da sauran globtized abubuwa.