Meaning of Brinell hardness number

Brinell' hard'ness num"ber

Pronunciation: [key]
— Metall. Metall.
  1. a rating obtained from a testto determine the hardness of a metal by pressing a steel ball of a standard size into the metal using a standard force. Also calledAbbr.: Bhn
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.