Cobalt raws li cov hmoov txhuas yog cov khoom siv zoo heev, uas feem ntau yog siv rau hauv kev tsim cov khoom siv corrosion-resistant thiab hnav-resistant, xws li cov cuab yeej siv kho mob, cov khoom siv tshuaj, cov khoom kub kub hauv qhov cub, thiab lwm yam. Cov yam ntxwv ntawm siab hardness, hnav tsis kam thiab corrosion kuj.