Hard facts

Theory of hardness testing

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In order to achieve as broad an application area as possible for the Rockwell process, several Rockwell methods have been developed for both the Rockwell and the Super Rockwell processes.

The individual Rockwell methods are distinguished from each other by:

  • Type of indenter (material, shape and size or ball diameter);
  • Magnitude of total test force (total force or main load);
  • Scale division (basis h0 for the residual indentation depth (h) to be measured is 100 or 130;


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