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Calibration Uncertainties for Microform of Rockwell Hardness Indenters



F Rudder, Jun-Feng Song


A microform calibration procedure has been developed at NIST to certify geometric conformity of Rockwell C hardness indenters. The interest in microform calibrations is to unify national and international comparisons of hardness tests. Using accepted practice, we have determined the measurement uncertainties of each step of the calibration procedure. The measurement uncertainties are expressed and combined using ISO and NIST guidelines. These guidelines unify the reporting of the calibration uncertainty for national and international comparisons. The problem is described, necessary terminology is explained and an example is presented using measurement results.
Proceedings Title
Proceedings of Measurement Science Conference
Conference Dates
January 1, 1995
Conference Location
Anaheim, CA, US


Rudder, F. and Song, J. (1995), Calibration Uncertainties for Microform of Rockwell Hardness Indenters, Proceedings of Measurement Science Conference, Anaheim, CA, US (Accessed July 21, 2024)


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Created December 31, 1994, Updated October 12, 2021