Assertion: tungsten's hardness | /r/HasProperty | high
Facets:
value: very
type: DEGREE
Source sentences:
text: The hardness of tungsten is also very high, and the hardness of tungsten carbide is close to that of the diamond.
text: The hardness of tungsten is very high, and the density of tungsten is close to gold, so it can improve the strength, hardness and wear resistance of steel.
text: The melting point of tungsten is the highest among all metals, and its hardness is also very high, so it is often used to produce heat-resistant and wear-resistant alloys.