E.G. Aslanyan, A.E. Aslanyan, A.N. Shchipunov

Al’manac of Modern Metrology № 4 (16) 2018, pages 80–89

The work describes a problem that has arisen as a result of amending the definition of Rockwell and Super-Rockwell hardness scales. The factors affecting the hardness numbers on the Rockwell and Super-Rockwell scales are described. The solution of the problem of ensuring the uniformity of hardness measurements by Rockwell and Super-Rockwell scales is given. The metrological characteristics of the improved State primary standard of hardness on Rockwell and Super-Rockwell scales are given.

Key words: State primary standard, Rockwell hardness scales, Super-Rockwell hardness scales.

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