Assertion: tungsten | /r/ObjectUse | used in steel
Facets:
Source sentences:
text: Tungsten is used in alloys, such as steel, to which it imparts great strength.
text: Tungsten (W) , also called wolfram , chemical element , an exceptionally strong refractory metal of Group 6 (VIb) of the periodic table , used in steels to increase hardness and strength and in lamp filaments.