BHN Formula

Brinell hardness scale, known as the Brinell hardness number (BHN) measures the permanent width of indentation produced by a carbide indenter applied on a test material at a given load, for the given time. The below given is the BHN Formula that helps you in the BHN Brinell Hardness Number Test on your own. Substitute the values of the load, diameter of indenter in millimeters, and depression diameter in millimeters in the Brinell Hardness Number formula and calculate the result.

Brinell Hardness Number Formula


BHN = 2P / [ πD(D - √(D2-d2)) ]


P = Load
D = Steel Ball Diameter
d = Depression Diameter

Related Calculator:

Brinell scale measures the indentation hardness of materials in relation with the scale of penetration of an indenter, loaded on a test material. Use the value of 3.14159 instead ? in the Brinell Hardness Number formula.

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