Txhua hom alloys muaj cov yam ntxwv hauv qab no:
(1) Lub melting point ntawm cov alloys feem ntau yog qis dua qhov melting point ntawm ib qho ntawm nws cov khoom siv hlau;
(2) Lub hardness yog feem ntau ntau dua hardness ntawm tej hlau nyob rau hauv nws cov khoom; (Tshwj xeeb cov ntaub ntawv: sodium potassium alloy yog kua thiab siv los ua tus neeg ua haujlwm kub hloov hauv atomic reactors)
(3) Cov hluav taws xob thiab thermal conductivity ntawm cov hlau yog qis dua li ntawm cov khoom siv hlau. Siv cov yam ntxwv ntawm cov hlau no, kev ua haujlwm siab thiab cov khoom siv thermal kuj tuaj yeem tsim tau. Cov khoom siv nrog cov khoom tshwj xeeb kuj tuaj yeem tsim tau.
(4) Qee qhov muaj zog corrosion kuj (xws li stainless hlau). Piv txwv li, 15% chromium thiab 9% npib tsib xee ntxiv rau hlau kom tau txais cov hlau tsis muaj corrosion-resistant, uas yog tsim rau kev lag luam tshuaj.