Brinell Hardness Testings

To define the hardness of a material a standardized bullet made of hard metal or steel with a diameter of 10, 5, 2.5 or 1 mm (depending on size and hardness of the work piece) is pressed into the surface of the work piece with a certain test load F. The Brinell hardness (HBW) results as quotient of the test load (F) and the area of the resulting cone impression (A):

HBW = F/A = 0.102 x F/A

The coefficient 0.102 is a converison factor introduced with Newton as measuring unit for force.

Advatages and Disadvantages
Precise and repeatable values – only for soft and medium hard materials.

Applicable for:
Annealed and tempered steel, light metal and heavy metal