Low carbon karfe, wanda kuma ake kira m karfe, shi ne rukuni na baƙin ƙarfe tushen gami tare da carbon a matsayin alloying abubuwa amma carbon abun ciki ne kasa da 0.25%. Saboda ƙarancin ƙarfinsa, ƙarancin taurinsa da laushi, ana kuma kiransa ƙaramin ƙarfe. Ya haɗa da yawancin karafa na tsarin carbon na yau da kullun da wasu ƙananan ƙarfe na tsarin carbon. Yawancin su ana amfani da su don sassan tsarin injiniya ba tare da maganin zafi ba, wasu kuma ana amfani da su don sassa na inji waɗanda ke buƙatar juriya bayan carburizing da sauran magungunan zafi.
Tsarin annealed na ƙananan ƙarfe na carbon shine ferrite da ƙananan pearlite, ƙarfinsa da taurinsa sun kasance ƙasa, kuma filastik da taurinsa sun fi kyau. Saboda haka, yanayin sanyinsa yana da kyau, kuma ana iya yin sanyi ta hanyar hanyoyin kamar crimping, lankwasa, da tambari. Har ila yau, wannan karfe yana da kyakkyawan walƙiya. Ƙananan ƙarfe na carbon gabaɗaya yana nufin ƙarfe tare da abun ciki na carbon tsakanin 0.10 da 0.25%. Irin wannan karfe yana da ƙananan tauri da kuma filastik mai kyau. Ya dace don ɗaukar tsarin nakasar filastik mai sanyi, walda da yanke. Ana amfani da shi sau da yawa don yin sarƙoƙi, rivets, bolts, shafts, da dai sauransu.
Tsarin annealed na ƙananan ƙarfe na carbon shine ferrite da ƙananan pearlite, ƙarfinsa da taurinsa sun kasance ƙasa, kuma filastik da taurinsa sun fi kyau. Saboda haka, yanayin sanyinsa yana da kyau kuma ana iya yin sanyi ta hanyar hanyoyi kamar crimping, lankwasawa, da stamping. Wannan karfe yana da kyau weldability. Low carbon karfe tare da sosai low carbon abun ciki yana da low taurin da matalauta machinability. Normalizing jiyya na iya inganta machinability.
Ƙarfe mai ƙarancin carbon ana jujjuya shi zuwa ƙarfe na kusurwa, ƙarfe na tashar, I-beam, bututun ƙarfe, tsiri na ƙarfe ko farantin karfe, wanda ake amfani da shi don yin abubuwan gini daban-daban, kwantena, kwalaye, jikin tanderu da injinan noma. Ƙarfe mai ƙarancin carbon mai inganci yana jujjuya shi cikin faranti na bakin ciki don yin samfura mai zurfi kamar takin mota da hulunan injin; Hakanan ana jujjuya shi cikin sanduna don yin sassa na inji tare da ƙarancin ƙarfin buƙatun. Ƙananan karfen carbon gabaɗaya ba a yi amfani da zafi ba kafin amfani. Carburized ko cyanidized karfe tare da abun ciki na carbon fiye da 0.15% ana amfani dashi don shafts, bushings, sprockets da sauran sassan da ke buƙatar babban zafin jiki da kuma juriya mai kyau.
An ƙuntata amfani da ƙananan ƙarfe na carbon saboda ƙarancin ƙarfinsa. Haɓaka abubuwan da ke cikin manganese daidai a cikin ƙarfe na carbon, da ƙara adadin abubuwan da ke haɗawa da su kamar vanadium, titanium, niobium, da sauransu, na iya ƙara ƙarfin ƙarfen sosai. Idan an rage abun ciki na carbon a cikin karfe kuma an rage ƙananan adadin aluminum, ƙananan adadin boron da carbide suna samar da abubuwa masu tasowa, za'a iya samun rukunin bainite mai ƙarancin ƙarancin carbon wanda ke da ƙarfi mai ƙarfi kuma yana kiyaye mafi kyawun filastik da tauri.
Abubuwan da ke cikin carbon na simintin ƙananan ƙarfe bai wuce 0.25% ba, yayin da abun ciki na carbon simintin simintin ƙarfe yana tsakanin 0.25% da 0.60%, kuma abun cikin carbon na simintin babban carbon karfe yana tsakanin 0.6% da 3.0%. Ƙarfi da taurin simintin ƙarfe na simintin ƙarfe yana ƙaruwa tare da karuwar abun cikin carbon.
Cast carbon karfe yana da wadannan abũbuwan amfãni: ƙananan samar da farashin, mafi girma ƙarfi, mafi kyau tauri da kuma mafi girma filastik. Ana iya amfani da simintin ƙarfe na simintin ƙarfe don kera sassan da ke ɗaukar kaya masu nauyi, irin su mirgine niƙa na ƙarfe da sansanonin latsa ruwa a cikin injuna masu nauyi. Hakanan za'a iya amfani da shi don kera sassan da ke ƙarƙashin manyan ƙarfi da tasiri, kamar ƙafafu, ma'aurata, bolsters da firam ɗin gefe akan motocin jirgin ƙasa.
