The hardness of metals

The hardness of the metal, refers to the local volume of metal surface resistance by foreign pressure caused by plastic deformation resistance, the higher the hardness showed that the ability of resistance to plastic deformation of metal is stronger, the metal plastic deformation more difficult. Hardness test method is simple and easy, and damage to parts. The commonly used methods of hardness testing: Brinell hardness, Rockwell hardness and Vivtorinox three. Three kinds of hardness test value conversion between general, machinery, mechanical technology or metal materials in general are manual conversion table.