![]() The Rockwell test is more accurate than the Brinell test because it measures just one depth rather than two different sizes. Still, instead of measuring the depth of this indentation, it simply measures its size.īoth methods have their advantages. The Brinell hardness test also uses a diamond point to make an indentation in the tested metal. The hardness number is then determined by measuring how deep this indentation is. The Rockwell test measures the depth of indentation left on a piece of steel when pressed into it with a special diamond point. ![]() While the Rockwell hardness test and Brinell hardness test are used to measure the hardness of metals, they are different methods. Standard Hardness Conversion Calculator for Metals (ASTM) Metal Hardness Tests – Difference Between Rockwell and Brinell Hardness Test When choosing a material or cutting tool to produce CNC machining parts, hardness should be considered. ![]() This allows the testing of materials with varying properties like elasticity and plasticity, which cannot be determined using Vickers or Rockwell scales Rockwell C scale – this test determines the hardness of a material by measuring the depth of penetration of a diamond-tipped stylus into its surface.īrinell hardness test (HB) – this method uses more than one load and applies it at different speeds. The hardness number assigned to different materials depends on the load used and the time taken to achieve that load. Vickers hardness test (HV) – this method uses a special diamond pyramid with a specified load applied for a specific time. What is the Hardness of a Material? There are three types of hardness: ![]() In other words, it is the ability to maintain its shape when an object is subjected to force. Hardness is defined as the resistance to permanent deformation or scratch. 4 Rockwell and Brinell tests are different in how they measure hardness. ![]()
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