Rockwell scale

The Rockwell scale is a standard method used to measure the hardness of materials, especially metals. It involves pressing a specifically shaped indenter into the material under a set load and then measuring how deep the indenter goes. The less the indentation, the harder the material. The scale provides a numerical value called a "Hardness Number" (e.g., HRC for steel), which helps compare the resistance of different materials to deformation. This measurement is quick, consistent, and widely used in manufacturing and quality control to ensure materials meet specific hardness requirements.