Principles of hardness testing

Distinction between static and dynamic hardness testing methods

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A principle distinction between the hardness testing methods generally used in technical testing is made between methods with static force application and those with dynamic force application.

In the static methods that are predominantly used for the hardness testing of metals, the test force is gradually increased (see illustration below), i.e. it is applied smoothly within a minimum time stipulated in the standards.

In the dynamic methods, on the other hand, the test force is applied abruptly so that the test specimen is subjected to an impact load.

Application of the test force during static hardness testing