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Brinell hardness number

American  
[bri-nel hahrd-nis nuhm-ber] / brɪˈnɛl ˈhɑrd nɪs ˌnʌm bər /

noun

Metallurgy.

  1. 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. Bhn, HB

Brinell hardness number British  
/ brɪˈnɛl /

noun

  1. 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

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of Brinell hardness number

Named after J.A. Brinell (1849–1925), Swedish engineer

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.