STP1248: Proposed Changes to Charpy V-Notch Machine Certification Requirements

    Splett, JD
    Mathematical Statistician, Computing and Applied Mathematics Laboratory, National Institute of Standards and Technology, Boulder, CO

    Wang, JC-M
    Mathematical Statistician, Computing and Applied Mathematics Laboratory, National Institute of Standards and Technology, Boulder, CO

    Pages: 13    Published: Jan 1995


    Abstract

    In 1989 the administration of the Charpy V-Notch Certification Program was assumed by the National Institute of Standards and Technology. The United States Army originated the program to insure the measurement integrity of Charpy V-notch machines across the country. The program has been operated for many years using candidate machine acceptance limits which can possibly be traced to a 1955 paper by Driscoll, however, the original statistical justification for using these acceptance criteria has been lost or never existed. A statistical analysis of recent certification program data indicates that the existing candidate machine acceptance limits should be modified. In this paper, we will discuss and justify potential changes to candidate machine acceptance limits.

    Keywords:

    notched-bar testing, reference specimens, Charpy V-notch machine certification program, pendulum impact machines, impact testing


    Paper ID: STP14664S

    Committee/Subcommittee: E28.08

    DOI: 10.1520/STP14664S


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