Rockwell hardness testers are important instruments in materials testing. They are used to determine the hardness of metals and other materials. Named after Stanley P. Rockwell, who developed the Rockwell hardness testing method in the 1920s, these devices provide a reliable and accurate way of measuring the resistance of a material to plastic deformation.
The testing process is carried out by penetrating a test piece - either in the form of a diamond cone or a hard metal ball - into the material. The penetration depth is then measured to determine the hardness. Various Rockwell scales are used, depending on the material and application. The most common are
Rockwell hardness testers are characterized by their user-friendliness and versatility. They enable quick and easy hardness testing directly on site or in the laboratory. The tests are virtually non-destructive, which means that the tested materials and test specimens can usually be reused after the test.
A typical Rockwell hardness tester consists of:
By applying a predefined test force, with which the indenter is pressed into the material in two force stages and the subsequent measurement of the permanent indentation depth, the hardness of the material can be precisely determined.
The results of Rockwell hardness tests are decisive for the safety and reliability of components in various industries. Among other things, they are used in:
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The Rockwell Hardness Tester HP 150 R is suitable for hardness tests in the range from 0.2 kg to 250 kg.