DescriptionThe Brinell hardness test uses a ball indenter of diameter, D, which is pressed into the surface of the test piece using a prescribed force, F. The time for the initial application of the force is 2 s to 8 s, and the test force is maintained for 10 s to 15 s. The diameter of the indentation, d, is measured after the force has been removed. The Brinell hardness number, HB, is given by:
HB = Constant × F / Surface area of indentation
Standard Brinell Scales
The designation "HBW" specifies the use of a tungsten carbide ball indenter.
It should be noted that measurements of HBW and HBS on the same sample may differ in value due to differences in the tribological characteristics of the indenter-specimen interface.