BHN has various meanings in the Governmental & Military category. Discover the full forms, definitions, and usage contexts of BHN in Governmental & Military.
A saltwater solution for quenching or cooling when heat treating steel. Or A common standard method of measuring the hardness of materials. The smooth surface of the metal is subjected to indentation by a hardened steel ball under pressure. The diameter of the indentation, in the material surface, is then measured by a microscope and the hardness value is read from a chart or determined by a prescribed formula.
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