BHN Brinell Hardness Number Test

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Load (Kilogram Force)  
Steel Ball Diameter (millimeter)  
Depression Diameter (millimeter) 
Description (-)
BHN or Brinell Number is the numerical value assigned to the hardness of metals and alloys.The test is to determine the hardness of a metal by pressing a steel ball of a standard size into the metal using a standard force.

Formula:
BHN = 2p/pi*D(D-sqrt(D2-d2))
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