Qhov sib txawv tseem ceeb tshaj plaws ntawm ob cov hlau tseem ceeb no yog cov hlau hnyav dua li txhuas. Nyob rau hauv chav tsev kub, txhuas muaj qhov ntom ntawm 2.70 g / cm3, thaum hlau muaj qhov ceev ntawm 7.87 g / cm3, ua rau hlau hnyav dua hlau. Aluminium thiab hlau yog siv los ua tsheb thiab dav hlau qhov chaw.
Txawm li cas los xij, lub cev ntawm lub tsheb thiab dav hlau yog ua los ntawm txhuas vim nws qhov sib zog thiab qhov hnyav. Aluminium thiab hlau muaj cov khoom tseem ceeb xws li qhov hnyav atomic, atomic naj npawb, melting point, thiab boiling point. Hlau muaj lub cim Fe thiab tus lej atomic ntawm 26, thaum txhuas muaj tus lej atomic ntawm 13 thiab lub cim Al. hlau muaj qhov melting thiab boiling point ntau dua li txhuas.
Aluminium yog dav siv nyob rau hauv tuag-casting ntawm complex qhov chaw. Cov khoom siv hauv tsev, nkoj qhov chaw, khoom siv kho mob thiab lwm yam khoom siv yog tsim los siv txhuas ua cov khoom siv tseem ceeb.
Lwm qhov sib txawv tseem ceeb yog lawv lub peev xwm nyiam cov hlau nplaum. Thaum hlau yog magnetic heev, aluminium yog non-magnetic. Hauv lawv lub xeev ntshiab, ob qho tib si hlau yog silvery-grey, mos, thiab hnov mob nrog huab cua, tab sis txhuas yog ntau reactive dua hlau.
Thermal thiab hluav taws xob conductivity yog cov khoom ntawm tag nrho cov hlau; Txawm li cas los xij, aluminium yog tus neeg xyuas pib zoo dua li hlau. Hlau thiab txhuas yog siv dav hauv ntau yam khoom lag luam, thaum txhuas muaj qhov zoo dua vim nws tsis kam tiv thaiv corrosion. Ntawm qhov tod tes, hlau corrodes sai sai. Nws yog tov nrog carbon los ua cov hlau tsis muaj hlau.
