Assertion: erbium | /r/CapableOf | lower the hardness
Facets:
Source sentences:
text: When added to vanadium, erbium lowers the hardness and improves pliability of the metal.
text: Added to vanadium, for example, erbium lowers hardness and improves workability
text: Some erbium is added to alloys with metals such vanadium because it lowers their hardness, making them more workable.
text: Added to vanadium, for example, erbium lowers the hardness and improves workability.
text: Added to vanadium, for example, erbium lowers the hardness and improves workability.