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| Bri·nell hard·ness num·ber (plural Brinell hard·ness numbers) or Bri·nell num·ber (plural Brinell numbers) |
noun |
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| Definition: |
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measure of hardness: a number expressing the hardness of a metal or alloy. It is the ratio of the pressure applied to a steel ball forced into the surface of the metal to the surface area of the resulting indentation.
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