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Understanding the Rockwell Scale The Rockwell Scale (RS) test different metals based on their indentation hardness, which is how much pressure from a minor load does it take for an indenter to make an indentation in the metal. The indentation is measured in the amount of hardness of metal and listed as HRA, HRB, or HRC. Tensile strength (TS) measures how much metal can endure the elongation of a metal. The importance of knowing the RS on metal like chrome is important for testing how much pressure it takes to cause abrasive marks or wear on the metal. There is…