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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
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