The hardness test is one of the most important mechanical tests used by the metal-mechanical industry. The quality assurance of the measured results is mainly due to the human factor, which is involved in the verification, adjustment, and operation of the measuring equipment. Therefore, the main goal of this paper is to design and develop verification standards for Brinell (HB) and Rockwell (HRC) scales from low alloy carbon steels subjected to different types of heat treatment. In order to

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... re the reliability of the hardness values of the verification standards, they have been measured on equipment calibrated by laboratories belonging to the Brazilian Calibration Network (RBC). The results showed similar values based on ten measurements made on the standards surface.