Cobalt resembles ntshiab hlau los yog npib tsib xee nyob rau hauv cov tsos, thiab lub electrodeposited nyob yog qhov nyuaj dua li cov hlau cobalt ua rau kub. Cobalt muaj cov pa roj carbon me me (mus txog {0. 3%), uas nce lub zog ntawm cov hlau yam tsis muaj kev cuam tshuam nws lub hardness. Cobalt yuav raug machined, tab sis nws yog me ntsis nkig. Lub zog lub cev ntawm cobalt tsis tsuas yog nce siab rau ntawm txoj kev huv ntawm kev cobalt, tab sis kuj nyob ntawm lub xub ntiag (lossis cov khoom sib xyaw ntawm cov ntaub ntawv almropic). Muaj feem ntau tsis sib xws cov ntaub ntawv ntawm cov khoom tshaj tawm lub cev ntawm kev cobalt (txawm hais tias nws txoj kev coj dawb huv yog siab dua 99.9%). Qhov no tuaj yeem piav qhia los ntawm kev hloov pauv qeeb qeeb ntawm ob daim ntawv sib npaug ntawm kev cobalt.
Zoo li cov hlau thiab npib tsib xee, cobalt yog ferromagnetic. Txawm hais tias cov hlau muaj cov hlauetisation zoo tshaj plaws ntawm cov ntsiab lus ferrigagnetic, cobalt yog lub ntsiab lus uas tuaj yeem nce qhov kev magnetisation no. Cov hlau nplaum ntshiab yog 21,500 gs, thaum ib qho alloy muaj cai ntawm 65% co thiab 35% coable tuaj yeem ncav cuag cov hlau loj ntawm 24,300 gs. Cobalt's Superior Magnetism yog paub tias muaj cov kev txiav txim siab tshaj plaws ntawm 1121 degree. Thiab muaj ntau hom cobalt cov hlau tshwj xeeb thiab cobalt alloys tau tsim.
