Brinell hardness scale
The Brinell 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 Brinell hardness scale was the first type of hardness scale used widely. A Brinell hardness scale measurement is determined by applying a carbide ball indenter into the surface of the material being tested with a force ranging between 500kgf and 3000kgf.