Brinell Hardness Test
The Brinell hardness test is made when an indenter is forced into the surface of a test sample and the diameter of the indentation left in the surface after removal of the test force is measured.
The Brinell hardness number is a number that is proportional to the quotient obtained by dividing the test force by the curved surface area of the indentation which is assumed to be spherical and of the diameter of the ball (indenter).
The test must be conducted on a smooth, even surface that is free from oxide scale, foreign matter and lubricants.
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