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15 cards from this deck
Material's resistance to scratching/permanent deformation
Hard object pressed into material surface during testing
Softer: larger indentations; Harder: smaller marks
Small test piece positioned on machine table
Must be made from extremely hard materials
Diamond pyramid
Square impression
Diagonal lengths of square indentation
Vickers Hardness Number
Hardened steel sphere
Circular depression
Diameter of circular indentation
Brinell Hardness Number
Vickers
Brinell
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