ASTM E1251-07
(Test Method)Standard Test Method for Analysis of Aluminum and Aluminum Alloys by Atomic Emission Spectrometry
Standard Test Method for Analysis of Aluminum and Aluminum Alloys by Atomic Emission Spectrometry
SIGNIFICANCE AND USE
The metallurgical properties of aluminum and its alloys are highly dependant on chemical composition. Precise and accurate analyses are essential to obtaining desired properties, meeting customer specifications and helping to reduce scrap due to off-grade material.
This test method is applicable to chill cast specimens as defined in Practice E 716 and can also be applied to other types of samples provided that suitable reference materials are available. Also, other sample forms can be melted-down and cast into a disk, using an appropriate mold, as described in Practice E 716. However, it should be noted that some elements (for example, magnesium) readily form oxides, while some others (for example, sodium, lithium, calcium, and strontium) are volatile, and may be lost to varying degrees during the melting process.
SCOPE
1.1 This test method describes the analysis of aluminum and its alloys by atomic emission spectrometry. The aluminum specimen to be analyzed may be in the form of a chill cast disk, casting, foil, sheet, plate, extrusion or some other wrought form or shape. The elements covered in the scope of this method are listed in the table below.Note 1
The concentration ranges given in the above scope were established through cooperative testing (ILS) of selected reference materials. The range shown for each element does not demonstrate the actual usable analytical range for that element. The usable analytical range may be extended higher or lower based on individual instrument capability, spectral characteristics of the specific element wavelength being used and the availability of appropriate reference materials.
1.2 This test method is suitable primarily for the analysis of chill cast disks as defined in Practices E 716. Other forms may be analyzed, provided that: (1) they are sufficiently massive to prevent undue heating, (2) they allow machining to provide a clean, flat surface, which creates a seal between the specimen and the spark stand, and (3) reference materials of a similar metallurgical condition and chemical composition are available.
This standard does not purport to address all of the safety concerns, 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. Specific safety and health statements are given in Section 10.
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Standards Content (Sample)
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Designation:E1251–07
Standard Test Method for
Analysis of Aluminum and Aluminum Alloys by Atomic
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Emission Spectrometry
This standard is issued under the fixed designation E1251; 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 (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope be analyzed, provided that: (1) they are sufficiently massive to
prevent undue heating, (2) they allow machining to provide a
1.1 Thistestmethoddescribestheanalysisofaluminumand
clean, flat surface, which creates a seal between the specimen
its alloys by atomic emission spectrometry. The aluminum
and the spark stand, and (3) reference materials of a similar
specimentobeanalyzedmaybeintheformofachillcastdisk,
metallurgical condition and chemical composition are avail-
casting,foil,sheet,plate,extrusionorsomeotherwroughtform
able.
or shape. The elements covered in the scope of this method are
1.3 This standard does not purport to address all of the
listed in the table below.
safety concerns, if any, associated with its use. It is the
Tested Concentration Range
Element
responsibility of the user of this standard to establish appro-
(Wt %)
Beryllium 0.0004 to 0.24
priate safety and health practices and determine the applica-
Bismuth 0.03 to 0.6
bility of regulatory limitations prior to use. Specific safety and
Boron 0.0006 to 0.009
health statements are given in Section 10.
Calcium 0.0002 to –
Chromium 0.001 to 0.23
Cobalt 0.4 to –
2. Referenced Documents
Copper 0.001 to 5.5
2
2.1 ASTM Standards:
Gallium 0.02 to –
Iron 0.2 to 0.5
E135 Terminology Relating to Analytical Chemistry for
Lead 0.04 to 0.6
Metals, Ores, and Related Materials
Lithium 0.0003 to 2.1
E158 Practice for Fundamental Calculations to Convert
Magnesium 0.03 to 5.4
Manganese 0.001 to 1.2
Intensities into Concentrations in Optical Emission Spec-
Nickel 0.005 to 2.6
3
trochemical Analysis
Phosphorus 0.003 to –
E172 Practice for Describing and Specifying the Excitation
Silicon 0.07 to 16
3
Sodium 0.003 to 0.02
Source in Emission Spectrochemical Analysis
Strontium 0.03 to –
E305 Practice for Establishing and Controlling Atomic
Tin 0.03to–
Emission Spectrochemical Analytical Curves
Titanium 0.001 to 0.12
Vanadium 0.002 to 0.022
E406 Practice for Using Controlled Atmospheres in Spec-
Zinc 0.002 to 5.7
trochemical Analysis
Zirconium 0.001 to 0.12
E691 Practice for Conducting an Interlaboratory Study to
NOTE 1—The concentration ranges given in the above scope were
Determine the Precision of a Test Method
established through cooperative testing (ILS) of selected reference mate-
E716 Practices for Sampling Aluminum and Aluminum
rials. The range shown for each element does not demonstrate the actual
Alloys for Spectrochemical Analysis
usable analytical range for that element. The usable analytical range may
be extended higher or lower based on individual instrument capability, E826 Practice for Testing Homogeneity of a Metal Lot or
spectral characteristics of the specific element wavelength being used and
Batch in Solid Form by SparkAtomic Emission Spectrom-
the availability of appropriate reference materials.
etry
E876 Practice for Use of Statistics in the Evaluation of
1.2 This test method is suitable primarily for the analysis of
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Spectrometric Data
chill cast disks as defined in Practices E716. Other forms may
1 2
This test method is under the jurisdiction of ASTM Committee E01 on For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Analytical Chemistry for Metals, Ores and Related Materials and is the direct contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
responsibility of Subcommittee E01.04 on Aluminum and Magnesium. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved June 1, 2007. Published June 2007. Originally the ASTM website.
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approved in 1988. Last previous edition approved in 2004 as E1251 – 04. DOI: Withdrawn. The last approved version of this historical standard is referenced
10.1520/E1251-07. on www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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E1251–07
E1329 PracticeforVerificationandUseofControlChartsin calibrants with a wide variety of compositions. Mathematical
Spectrochemical Analysis calculations are used to correct for both alloy difference and
E1507 Guide for Describing and Specifying the Spectrom- inter-element effects. Like the method above, specific alloy
eter of an Optical Em
...
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