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Standard Test Method for Analysis of Aluminum and Aluminum Alloys by Spark Atomic Emission Spectrometry
NORMA vydaná dňa 15.9.2017
Označenie normy: ASTM E1251-17
Poznámka: NEPLATNÁ
Dátum vydania normy: 15.9.2017
Kód tovaru: NS-798685
Počet strán: 10
Približná hmotnosť: 30 g (0.07 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
Keywords:
aluminum, aluminum alloys, Spark Atomic Emission Spectrometry (Spark-AES),, ICS Number Code 77.120.10 (Aluminium and aluminium alloys)
Significance and Use | ||||||||||||||||||||||||||||||||||||||||||||||||||||
5.1 The metallurgical properties of aluminum and its alloys are highly dependent 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. 5.2 This test method is applicable to chill cast specimens as defined in Practices E716 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 Practices E716. 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. |
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1. 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.
Note 2: Mercury (Hg) is intentionally not included in the
scope. Analysis of Hg in aluminum by spark atomic emission
spectrometry (Spark-AES) is not recommended. Accurate analysis of
Hg using this technique is compromised by the presence of an
intense iron interference. Inaccurate reporting of Hg due to these
interference effects can jeopardize the current designation of
aluminum production as a mercury-free process. To demonstrate
compliance with legislated Hg content limits, use of an alternate
method capable of analysis with a minimum reporting limit of
0.0001% or lower is recommended. Suitable techniques include but
are not limited to glow discharge mass spectrometry, XRF, and cold
vapor AA.
1.2 This test method is suitable primarily for the analysis of chill cast disks as defined in Practices E716. 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. 1.3 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. |
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2. Referenced Documents | ||||||||||||||||||||||||||||||||||||||||||||||||||||
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