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Rockwell Hardness Scale

The Rockwell hardness scale is one way in which the hardness of a material is represented numerically. Hardness is the resistance of a material to indentation and is measured by the permanent depth of an indentation that has occurred. The Rockwell hardness scale is the most common way to measure the hardness of a material. Through the application of a diamond indenter, first with a preliminary load and then with a major load, an indentation difference is calculated to determine the final Rockwell hardness scale measurement.

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