ASTM E322-12 Test Method for Analysis of Low-Alloy Steels and Cast Irons by Wavelength Dispersive X-Ray Fluorescence Spectrometry

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ASTM E322-12 Test Method for Analysis of Low-Alloy Steels and Cast Irons by Wavelength Dispersive X-Ray Fluorescence Spectrometry

ASTM E322-12 test method is comparative and intended for use as a routine method to test materials for compliance with compositional specifications.

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    Scope:

    This test method covers the X-ray fluorescence spectrometric analysis of low-alloy steels and cast irons for the Following elements in the ranges indicated.

    Elements Mass Fraction Range %
    Manganese 0.20 to 1.50
    Nickel 0.10 to 1.00
    Chromium 0.10 to 1.00
    Molybdenum 0.04 to 0.40
    Copper 0.05 to 0.30
    Vanadium 0.03 to 0.25

    Test procedure:

    The sample is finished to a clean, uniform surface, and then irradiated by an X-ray beam of high energy. The secondary x rays produced are dispersed by means of a crystal and the intensities are measured by a detector at selected wavelengths. The results are obtained by relating measured intensities to an appropriate calibration curve.

    Test specimen: 

    Low-alloy steel and cast iron material with the clean and flat surface using appropriate sander equipment with 240 grit or finer aluminum oxide abrasive paper.

    Data:

    The mass fractions are determined from the prepared calibration curves.

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