Metalarfen da muka yi amfani da shi don yin simintin mutu galibi sun haɗa da tutiya, jan ƙarfe, aluminium, magnesium, gubar, kwano, da gubar-tin ɗin allo da dai sauransu Duk da cewa baƙin ƙarfe ba safai ake samun sa ba, amma kuma yana yiwuwa. A halaye na daban-daban karafa yayin mutu simintin su ne kamar haka:
• Tutiya: Mafi sauƙin mutu-simintin ƙarfe, tattalin arziki lokacin ƙirƙirar ƙananan sassa, mai sauƙin kwalliya, ƙarfin ƙarfi mai ƙarfi, ƙarancin filastik, da kuma tsawon rayuwar jefa.
• Aluminium: High quality, hadaddun masana'antu da kuma bakin ciki-walled simintin gyare-gyare tare da babban girma kwanciyar hankali, high lalata juriya, kyau inji Properties, high thermal watsin da lantarki watsin, da kuma babban ƙarfi a high yanayin zafi.
• Magnesium: Mai sauƙin inji, ƙarfin ƙarfi zuwa nauyin nauyi, mafi ƙarancin ƙananan ƙarfe da aka saba amfani dasu.
• Tagulla: High taurin da karfi lalata juriya. Mafi yawan karfe da aka yi amfani da mutu-cast yana da mafi kyawun kayan inji, anti-lalacewa da ƙarfi kusa da karfe.
• Gubar da kwano: Babban girma da daidaito mai girma don sassa na musamman na lalata lalata. Saboda dalilai na lafiyar jama'a, ba za a iya amfani da wannan gami a matsayin wurin sarrafa abinci da adana shi ba. Ana iya amfani da gubar-tin-bismuth gami (wani lokacin kuma dauke da ɗan jan ƙarfe) don yin rubutun hannu da bugawa mai ɗumi a cikin buga wasiƙa.
