The Rockwell hardness test is one of the most widely used indentation hardness tests today. The Brinell and Vickers hardness tests are also used, albeit less frequently. Most indentation hardness tests quantify the deformation that takes place when an indenter penetrates the material being tested. When conducting a Rockwell hardness test, the indenter is subjected to two levels of force at predetermined rates and dwell periods. In contrast to the Brinell and Vickers tests, where the indentation’s size is assessed after it has been made, this is different. The difference in the depth of the indenter at two precise points during the testing cycle determines the material’s Rockwell hardness.

A formula was developed to provide a number lying within an arbitrary range of values known as a Rockwell hardness scale, which is used to determine the value of hardness.

The measuring accuracy of NextGen’s Ultrasonic Contact Impedance Hardness Tester – UH200 is HV: ±3%HV; HRC: ±1.5HRC; HB: ±3%HB.

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