Result analysis of EURAMET Brinell comparison between INRiM, UME and PTB (EURAMET.M.H–S2.A.B)

A EURAMET supplementary comparison between INRiM (National Metrology Institute of Italy), UME (National Metrology Institute of Republic of Turkey) and PTB (National Metrology Institute of Germany) had been decided to be organized in the field of Hardness Metrology to determine the consistency of the national hardness standards in these three countries realizing Brinell Hardness measurements in accordance with ISO 6506–1:2014 [1] and ISO 6506–3:2014 [2] standards. Widely used Brinell Hardness scales such as HBW 1/30 and HBW 2.5/187.5 constitute the scope of the comparison. In this paper the procedure and comparison results are explained