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Article: Uncertainties in Rockwell hardness tests.
- Article from:
- Advanced Materials & Processes
- Article date:
- April 1, 2003
- Author:
CopyrightCOPYRIGHT 2003 ASM International. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Part I; uncertainty equations enable the calculation of critical uncertainties in hardness measurements. Part I provides the equations and shows the steps to calculating uncertainties. Part II (May AM&P) will provide some information on how to improve the uncertainty values.
The accreditation of test laboratories is aimed at providing a high level of confidence that the test results are as accurate as possible, and is rapidly becoming the industry norm in the United States. ISO 17025 is the main document that defines the basic requirements for laboratory accreditation, and one of its requirements is that every calibration done by or for the laboratory must have an ...