The density (specific gravity) of a material is the relation mass to volume. It is determined by the water displacement technology (Archimedean Principle).

Density is usually used to determine whether the composition of a grade is correct or not. What differs from common understanding is that the porosity of modern cemented carbide can not be determined by the measurement of the density. The density of tungsten carbide (WC) is 15.7g/cm3 and that of cobalt is 8.9g/cm3.