WORLDWIDE ACTIVITIES AROUND HARDNESS MEASUREMENT - ACTIVITIES IN CCM/CIPM, IMEKO/TC5, OIML/TC10 AND ISO/TC164 -
Kozo Iizuka
Abstract:
All of hardness testing methods now in use were invented about a century ago but it was after the World War II that the international conformity of the test results was required and that the standardization of the testing methods and testing machines was investigated and promoted. In this paper, the historical role of four international organizations, CIPM, IMEKO, OIML and ISO for the progress of the standardization of hardness testing and on the development of the metrological standards of hardness is reviewed together with some remark on the discussions related to the definition of hardness as a quantity. Then a few comments on the feature and metrological meaning of hardness standards are described.
