Leeb / Rebound Hardness

This class of hardness testers works by bouncing an impact body off of the surface to be tested, and measuring the rebound velocity relative to the incident velocity. The harder the test material, the faster the rebound, and the higher the hardness value.

A variety of impact devices are available to suit a range of testing applications, but in general this class of equipment is best suited for use on solid parts like castings and forgings. It is not recommended for parts weighing less than 11 lbs (5 kg). The rebound method is standardized by ASTM A956. While it does not replace classical Brinell testing or other standardized methods, it complements these methods with a fast, easy and field portable approach to hardness testing.

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