Chimango cha olumala chimapangidwa ndi aluminiyamu.
Ubwino wa aluminiyamu:
1. Yopepuka komanso yofewa: kuchuluka kwa aluminiyamu kuli pafupifupi gawo limodzi mwa magawo atatu a chitsulo;
2. Mphamvu yabwino: mphamvu yokoka ya aluminiyamu yoyera ndi gawo limodzi mwa magawo asanu a chitsulo chotsika mpweya, koma mphamvu yake idzawonjezeka kwambiri pambuyo pokonza kutentha ndi kulimbitsa alloying;
3. Kukana dzimbiri: Chimodzi mwa makhalidwe a aluminiyamu ndichakuti filimu yokhuthala ya oxide imapangidwa pamwamba ikakhudzana ndi mpweya, zomwe zingalepheretse dzimbiri, kotero imakhala ndi kukana dzimbiri bwino. Ngati "njira yothandizira alumina nembanemba" igwiritsidwa ntchito, imatha kuletsa dzimbiri kwathunthu;
4. Kugwira ntchito bwino: ntchito yotulutsa aluminiyamu ndi yabwino, ndipo njira yachiwiri yopangira ndi kupindika nayonso ndi yosavuta;
5. Yosavuta kuikonzanso: aluminiyamu ili ndi malo otsika osungunuka, yosavuta kuikonzanso komanso yopanda kuipitsa chilengedwe ikakonzedwa, zomwe zimathandiza kuteteza chilengedwe komanso mogwirizana ndi njira yopititsira patsogolo chitukuko chokhazikika.