Hauv kev lag luam metallurgy thiab foundry, cov hlau tsis muaj hlau yog cov hlau lossis cov hlau tsis muaj hlau (ferrite) hauv qhov muaj txiaj ntsig. Piv nrog rau cov hlau ferrous, cov hlau tsis muaj hlau muaj ntau qhov zoo ntawm qhov hnyav (piv txwv lialuminium), siab dua conductivity (egtooj liab), cov cuab yeej tsis sib nqus lossis tsis kam tiv thaiv corrosion (xws lizinc). Feem ntau siv cov hlau tsis-ferrous rau castings muaj xws li txhuas, tooj liab, npib tsib xee, chrome, molybdenum, manganese, magnesium thiab zinc, thiab alloys xws li tooj dag. Cov hlau tsis-ferrous feem ntau yog ua kom zoo los ntawm electrolysis. Ntau yam ntawm cov hlau uas tsis yog-ferrous tau ntxiv rau hauv cov hlau ua ntej cam khwb cia kom tau cov hlau alloy lossis cov hlau cam tshwj xeeb uas muaj qee qhov kev ua tau zoo xws li hnav tsis kam, corrosion resistance, kub tsis kam ... thiab lwm yam.
