Rockwell Hardness is a measure of a material's resistance to deformation, particularly indentation. It is determined using a specific testing method that involves applying a load to a hard indenter, which creates an indentation in the material. The depth of this indentation is then measured to calculate the hardness value, which is expressed on various scales, such as Rockwell A, B, or C. The Rockwell test is widely used in industries to assess the hardness of metals and other materials. It is favored for its speed and simplicity, allowing for quick evaluations without extensive sample preparation. This makes it a valuable tool in quality control and material selection processes.