Utyalo mali lwentsimbi engwevu ziimveliso ezigalelwa yinkqubo yotyalo-mali elahlekileyo kwisiseko sesinyithi. Intsimbi engwevu (okanye intsimbi engwevu) luhlobo lwentsimbi ye-iron-carbon alloy (okanye iFerrum-Carbon Alloy) ene-graphite microstructure. Ithiywe ngombala ongwevu wokuqhekeka owenzayo. 
