The resistance of a material to plastic flow, most often measured by indentation by a penetrator under an impressed load. Additionally, hardness may refer to the resistance to machining, abrasion, or scratching. See HARDNESS TESTING.
The resistance of a material to plastic flow, most often measured by indentation by a penetrator under an impressed load. Additionally, hardness may refer to the resistance to machining, abrasion, or scratching. See HARDNESS TESTING.