The Full Form of BHN is Brinell Hardness Number.
The fundamental concept is that the diameter of the indentation in a harder material has a smaller diameter. The Brinell hardness number (BHN or HB) is inversely proportional to the surface area of the indentation. The Wilson® Model “J” Brinell Hardness tester is a hand operated mechanical device.
BHN
means
Brinell Hardness Number
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