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Full Description

1.1 This practice covers the procedure for calibration of instruments to be used for estimating the ferrite content of the microstructure of cast stainless steels by magnetic response or measurement of permeability. This procedure covers both primary and secondary instruments.

1.1.1 A primary instrument is one that has been calibrated using National Institute of Standards and Technology-Standard Reference Material (NIST-SRM) thickness coating standards. It is a laboratory tool to be used with test specimens. Some primary instruments may be used to directly measure the ferrite content of castings.

1.1.2 A secondary instrument is one that has been calibrated by the use of secondary standards that have been measured by a calibrated primary instrument. Secondary instruments are to be used to directly measure the ferrite content of castings.

1.2 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the specification.

1.3 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

 

Document History

  1. ASTM A799/A799M-10(2020)


    Standard Practice for Steel Castings, Stainless, Instrument Calibration, for Estimating Ferrite Content

    • Most Recent
  2. ASTM A799/A799M-10(2015)


    Standard Practice for Steel Castings, Stainless, Instrument Calibration, for Estimating Ferrite Content

    • Historical Version
  3. ASTM A799/A799M-10


    Standard Practice for Steel Castings, Stainless, Instrument Calibration, for Estimating Ferrite Content

    • Historical Version
  4. ASTM A799/A799M-04(2009)


    Standard Practice for Steel Castings, Stainless, Instrument Calibration, for Estimating Ferrite Content

    • Historical Version
  5. ASTM A799/A799M-04


    Standard Practice for Steel Castings, Stainless, Instrument Calibration, for Estimating Ferrite Content

    • Historical Version
  6. ASTM A799/A799M-92(2002)

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    Standard Practice for Steel Castings, Stainless, Instrument Calibration, for Estimating Ferrite Content

    • Historical Version
  7. ASTM A799/A799M-92(1997)


    Standard Practice for Steel Castings, Stainless, Instrument Calibration, for Estimating Ferrite Content

    • Historical Version