Brinell hardness calculator

The principle of Brinell Hardness is to use a certain test force F(N) (the unit of force is usually kgg kgf, note: 1kgf=9.8N, kgf is the force of one kilogram), the diameter is Press the D (mm) quenched steel ball or carbide ball into the surface of the metal to be tested, remove the test force after a specified time, and measure the average diameter d (mm) of the indentation with a reading microscope, and then calculate according to the formula. The Brinell hardness HB value, or the HB value is found from the prepared Brinell hardness table according to d.

Calculation formula

\(BHN=(2 \times P) / [(pi \times D)(D - sqrt(D^2-d^2)]\)

Hardness range

The range is 8~650HBW.

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