Brinell hardness

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A scale for measuring the hardness of metals introduced around 1900 by the Swedish metallurgist Johann Brinell (1849–1925). A small chromium-steel ball is pressed into the surface of the metal by a load of known weight. The ratio of the mass of the load in kilograms to the area of the depression formed in square millimetres is the Brinell number.

Subjects: Chemistry — Physics.

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