Assertion: chrome alum | /r/CapableOf | increase hardness
Facets:
Source sentences:
text: Chrome alums increase hardness and improves resistance to wear and abrasion.
text: Chrome alums increase hardness, tensile strength, and toughness.
text: Chrome alums increase strength and hardness, and permits quenching in higher temperatures.
text: Chrome alums increase strength, hardness, hardenability, and toughness.