DIN EN ISO 6508-3
Metallic materials - Rockwell hardness test - Part 3: Calibration of reference blocks (ISO/DIS 6508-3:2013); German version prEN ISO 6508-3:2013
Metallische Werkstoffe - Härteprüfung nach Rockwell - Teil 3: Kalibrierung von Härtevergleichsplatten (ISO/DIS 6508-3:2013); Deutsche Fassung prEN ISO 6508-3:2013
Responsible national committee
NA 062-01-41 AA - Hardness testing for metals
Responsible european committee
CEN/TC 459/SC 1 - Test methods for steel (other than chemical analysis)