: Enhances strength and machinability, though it can decrease corrosion resistance.
If you download an old copy (e.g., ASTM E1251-04), you are out of compliance. Most accreditation bodies (A2LA, UKAS, ISO/IEC 17025) require the current version. Always verify the active version on ASTM.org. astm e125117a pdf
Beyond the scope, ASTM E1251-17a includes detailed technical instructions covering every aspect of the analysis. It references several related standards, such as for sample preparation, ASTM B985 for sampling, ASTM E135 for terminology, and ASTM E691 for interlaboratory precision studies. Section 10 of the standard also addresses specific safety and health statements that must be followed when using this method. : Enhances strength and machinability, though it can
In simple terms, it provides a uniform procedure for using a spark spectrometer to measure the chemical composition of aluminum. This includes determining the percentage of alloying elements (like silicon, copper, magnesium) and impurities (like iron). Always verify the active version on ASTM
Details how high-voltage sparks are used to vaporize a tiny portion of the sample, creating a spectrum of light that identifies the elemental composition.
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It is important to note that Mercury (Hg) is from the scope. The Spark-AES method is not recommended for Hg analysis due to an intense iron spectral interference that can lead to inaccurate results. For compliance with strict regulatory limits, an alternative method such as XRF, ICP-MS, or cold vapor atomic absorption is required.