ASTM E572-02a

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Designation:E572–02a
Standard Test Method for
Analysis of Stainless and Alloy Steels by X-ray
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Fluorescence Spectrometry
This standard is issued under the fixed designation E 572; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope E 1601 Practice for Conducting an Interlaboratory Study to
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Evaluate the Performance of an Analytical Method
1.1 This test method covers the analysis of stainless and
E 1622 Practice for Correction of Spectral Line Overlap in
alloy steels by wavelength dispersive X-ray Fluorescence
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Wavelength-Dispersive X-ray Spectrometry
Spectrometry for the determination of the following elements:
E 1806 Practice for Sampling Steel and Iron for Determi-
Element Range %
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nation of Chemical Composition
Chromium 2.0 to 25.0
Cobalt 0.03 to 0.40
Copper 0.05 to 3.50
3. Terminology
Manganese 0.3 to 5.0
3.1 For definitions of terms used in this test method, refer to
Molybdenum 0.15 to 3.5
Nickel 0.20 to 35.0
Terminology E 135.
Niobium 0.05 to 1.3
Phosphorus 0.01 to 0.03
4. Summary of Test Method
Silicon 0.05 to 0.20
Sulfur 0.02 to 0.30
4.1 The test specimen is finished to a clean, uniform surface
Titanium 0.002 to 0.04
and then irradiated with an X-ray beam of high energy. The
Vanadium 0.03 to 0.25
secondary X-rays produced are dispersed by means of crystals
NOTE 1—Unless exceptions are noted, concentration ranges can be
and the intensities are measured by suitable detectors at
extended by the use of suitable reference materials.
selected wavelengths. The outputs of the detectors in voltage
1.2 This standard does not purport to address all of the
pulsesarecounted.Radiationmeasurementsaremadebasedon
safety concerns, if any, associated with its use. It is the
the time required to reach a fixed number of counts, or on the
responsibility of the user of this standard to establish appro-
total counts obtained for a fixed time (generally expressed in
priate safety and health practices and determine the applica-
counts per unit time). Concentrations of the elements are
bility of regulatory limitations prior to use. Specific precau-
determined by relating the measured radiation of unknown
tionary statements are given in Section 10.
specimenstoanalyticalcurvespreparedwithsuitablereference
materials.Afixed-channel, polychromator system or a sequen-
2. Referenced Documents
tial, monochromator can be used for measurement of the
2.1 ASTM Standards:
elements.
E 135 Terminology Relating to Analytical Chemistry for
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5. Significance and Use
Metals, Ores, and Related Materials
E 305 Practice for Establishing and Controlling Spectro-
5.1 This procedure is suitable for manufacturing control and
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chemical Analytical Curves
for verifying that the product meets specifications. It provides
E 691 Practice for Conducting an Interlaboratory Study to
rapid, multi-element determinations with sufficient accuracy to
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Determine the Precision of a Test Method
assure product quality. The analytical performance data in-
E 1361 Guide for Correction of Interelement Effects in
cluded may be used as a benchmark to determine if similar
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X-ray Spectrometric Analysis
X-ray spectrometers provide equivalent precision and accu-
racy, or if the performance of a particular spectrometer has
changed.
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This test method is under the jurisdiction of ASTM Committee E01 on
6. Interferences
Analytical Chemistry for Metals, Ores and Related Materials and is the direct
6.1 Interelement effects or matrix effects exist for some of
responsibility of Subcommittee E01.01 on Iron, Steel, and Ferroalloys.
Current edition approved December 10, 2002. Published June 2003. Originally
the elements listed. Mathematical correction may be used to
approved in 1976. Last previous edition approved in 2002 as E 572 – 02a.
solve for these elements. Various mathematical correction
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Supporting data for this test method as determined by cooperative testing have
been filed at ASTM International Headquarters as RR: E-1-1032.
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Annual Book of ASTM Standards, Vol 03.05.
4 5
Annual Book of ASTM Standards, Vol 14.02. Annual Book of ASTM Standards, Vol 03.06.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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E572–02a
procedures are commonly utilized. See Guides E 1361 and 9. Reference Materials
E 1622. Any of these procedures that achieves analytical
9.1 Certified Reference Materials are available from na-
accuracy equivalent to that provided by this test method is
tional and international sources.
acceptable.
9.2 Reference Materials with matrices
...