6.35x6.35x6.35mm tungsten alloy cube price is 79.00USD/KG on Jan. 29, 2019. Tungsten heavy alloys which can also be called high gravity alloys are refractory metals. Basically there are two series, W-Ni-Fe and W-Ni-Cu, sometimes even W-Ni-Cu-Fe. It contains mainly tungsten ranging from 80wt% to 98wt%, and its density can reach 15.8~ 18.5g/cm3. Nickel, iron, copper serve as binder between tungsten grains and make the material ductile and more machinable. Compared to W-Ni-Cu, W-Ni-Fe possesses a better mechanical property, being widely used in national defense industry.