The Rockwell hardness test method is the most commonly used hardness test method. The Rockwell method measures the permanent depth of indentation produced by a force/load on an indenter.
The Rockwell scale is a hardness scale based on indentation hardness of a material. The Rockwell test determines the hardness by measuring the depth of penetration of an indenter under a large load compared to the penetration made by a preload.
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