Brinell hardness number


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Related to Brinell hardness number: Vickers Hardness Number

Brinell hardness number

n. Abbr. Bhn or HB
The numerical value assigned to the Brinell hardness of metals and alloys. Also called Brinell number.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Brinell hardness number

(brɪˈnɛl)
n
(General Engineering) 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]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

Bri•nell′ hard′ness num`ber

(brɪˈnɛl)
n.
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. Abbr.: Bhn
[after J.A. Brinell (1849–1925), Swedish engineer]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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Brinell Hardness Number (BHN) = 2P / {[pi] D [D - [check] ([D.sup.2] - [d.sup.2])]}
4 shows that greater Brinell hardness number represents greater hardness and which inturn shows the smaller area of indentation.
It is very hard, with a Brinell Hardness Number in the 300 to 380 range, but cutting can be very gummy.