รายละเอียดเอกสาร

This Standard specifies a method for the calibration of hardness reference blocks (hereafter referred to as reference blocks) to be used for the indirect verification and daily accuracy control of Vickers hardness testing machines as specified in JIS B 7725 (hereafter referred to as the testing machine). It should be noted that Vickers hardness determination from indentations < 20 µm in diagonal length may cause large uncertainties in the results.