materjali võime vastu panna pinna indenteerimisele
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Puudub absoluutne kõvadusskaala. Kõvaduse väljendamiseks kvantitatiivselt on eri-tüüpi kõvaduskatsete korral (nt Brinelli, Rockwelli, Vickersi jt indenteerimiskõvadused) oma määratletud skaala.
a measure of the resistance of a material to surface indentation or abrasion
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There is no absolute scale for hardness. Therefore, to express hardness quantitatively, each type of test has its own scale of arbitrarily defined hardness. Indentation hardness can be measured by Brinell, Rockwell, Vickers, Knoop, and scleroscope hardess tests.
