The Brinell test implies pressing a 1, 2.5, 5 or 10 mm tungsten carbide ball into a sample material and measuring the diameter of the impression left.
The Brinell test is used for larger samples with a coarse or inhomogeneous grain structure, such as castings and forgings. The maximum hardness for Brinell is 650 HBW in order not to deform the indenter.
Micro hardness test
HBW = Hardness Brinell Wolfram carbide
Wolfram carbide = Tungsten Carbide to underline that newer Brinell standards call for usage of tungsten carbide balls, as opposed to the (softer) steel balls previously used (HBS). Values will differ at higher hardnesses!
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