Strength thiab Toughness: Cov kav dej zoo laum yuav tsum muaj lub zog txaus thiab tawv kom tiv taus ntau yam khoom siv thaum lub sijhawm drilling, ua kom muaj kev nyab xeeb ntawm kev ua haujlwm.
Abrasion Resistance: Laum cov kav dej tas li rub tawm ntawm qhov tsim thaum lub sij hawm drilling, yog li ntawd, lawv xav tau kev txhuam zoo kom ntev lawv lub neej kev pab cuam.
Corrosion Resistance: Rau cov dej qhov dej uas muaj corrosive media, laum kav yuav tsum tau zoo heev corrosion kuj los tiv thaiv cov khoom puas.