Assertion: tungsten's hardness | /r/HasProperty | linked to tungsten and vanadium content
Facets:
value: generally
type: DEGREE
Source sentences:
text: At room temperature, in their generally recommended heat treatment, HSS grades generally display high hardness (above Rockwell hardness 60) and abrasion resistance (generally linked to tungsten and vanadium content often used in HSS) compared with common carbon and tool steels.