Choosing the right hardness testing device
Depending on the material, the expected hardness, the component size/mass and accessibility, and the testing task itself, the appropriate hardness testing method is selected. The most common hardness testing methods are Rockwell, Brinell, Vickers and Knoop, which are mostly used in stationary hardness testing devices. While Rockwell is evaluated using the depth measurement method, the Brinell, Vickers and Knoop methods are evaluated optically. However, the requirements for stationary hardness testing are not always met. In this case, mobile hardness testing devices are the right choice. UCI (Ultrasonic Contact Impedance), Leeb (rebound hardness testing) or Poldi (impact hardness testing) are common methods used for this purpose.