Brinell hardness number
noun Abbr. Bhn or HBThe American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
The numerical value assigned to the Brinell hardness of metals and alloys. Also called Brinell number.