brinell-number

Brinell hardness number

noun Metallurgy.
a rating obtained from a test (Brinell test) to determine the hardness of a metal by pressing a steel ball of a standard size into the metal using a standard force. Abbreviation: Bhn
Also called Brinell number.


Origin:
named after J.A. Brinell (1849–1925), Swedish engineer

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Brinell hardness number (brɪˈnɛl)
 
n
a measure of the hardness of a material obtained by pressing a hard steel ball into its surface; it is expressed as the ratio of the load on the ball in kilograms to the area of the depression made by the ball in square millimetres
 
[C19: named after Johann A. Brinell (1849--1925), Swedish engineer]

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