You know what it looks like… but what is it called?
TAKE THE QUIZ“Vickers-hardness”
We have one entry that includes the term Vickers-hardness.
Vickers hardness test
noun: an indentation hardness test for metals in which a 136-degree diamond pyramid is pressed into the surface of the metal being tested by a load of 5 to 120 kilograms
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Merriam-Webster unabridged