Ƙarfin Simintin gyare-gyare

Saboda haka, abun da ke ciki yana kama da farin ƙarfe na simintin gyare-gyare, tare da ƙananan adadin carbon da silicon. Ƙarfin malleable yana ƙunshe da nodules na graphite waɗanda ba su da gaske kamar yadda suke a cikin baƙin ƙarfe ductile saboda an samo su daga maganin zafi maimakon lokacin sanyaya daga narkewa. Ƙarfe mai yuwuwa ana yin ta ta hanyar fara jefa farin ƙarfe ta yadda za a guje wa flakes na graphite, kuma duk carbon ɗin da ba a narkar da shi yana cikin nau'in ƙarfe na carbide. Ƙarfe mai yuwuwa yana farawa azaman simintin ƙarfe na farin ƙarfe wanda aka yi masa zafi na kwana ɗaya ko biyu a kusan 950 °C (1,740 °F) sannan ya yi sanyi kwana ɗaya ko biyu. Sakamakon haka, carbon a cikin carbide baƙin ƙarfe yana canzawa zuwa nodules graphite da ke kewaye da matrix na ferrite ko pearlite, ya danganta da ƙimar sanyaya. Tsarin jinkirin yana ba da damar tashin hankali na saman don samar da nodules na graphite maimakon flakes. Ƙarfe mai ƙyalƙyali, kamar baƙin ƙarfe ductile, yana da ƙaƙƙarfan ductility da tauri saboda yana haɗa graphite nodular da ƙananan matrix na ƙarfe na carbon. Kamar baƙin ƙarfe ductile, baƙin ƙarfe malleable shima yana nuna babban juriya ga lalata da ingantaccen injina. Ƙarfin malleable ƙarfe mai kyau na iya damping da ƙarfin gajiya suma suna da amfani ga dogon sabis a cikin sassan da ke da matsi sosai. Akwai nau'ikan ƙarfe guda biyu na ferritic malleable: blackheart da whiteheart.

Ana amfani da shi sau da yawa don ƙananan simintin gyare-gyare masu buƙatar ƙarfin ƙarfi mai kyau da kuma ikon iya jujjuyawa ba tare da karya ba (ductility). Aikace-aikace na simintin ƙarfe na simintin gyare-gyare sun haɗa da mahimman sassa na kera da yawa kamar masu ɗaukar kaya daban-daban, shari'o'i daban-daban, madaukai, da gidaje masu tuƙi. Sauran abubuwan amfani sun haɗa da kayan aikin hannu, madaukai, sassan injina, kayan aikin lantarki, kayan aikin bututu, kayan aikin gona, da na'urorin hakar ma'adinai.