ASTM_B_954_-_15.pdf

Designation:B95415Standard Test Method forAnalysis of Magnesium and Magnesium Alloys by AtomicEmission Spectrometry1This standard is issued under the fixed designation B954;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method describes the analysis of magnesiumand its alloys by atomic emission spectrometry.The magne-sium specimen to be analyzed may be in the form of a chill castdisk,casting,sheet,plate,extrusion or some other wroughtform or shape.The elements covered in the scope of thismethod are listed in the table below.ElementMass Fraction Range(Wt%)Aluminum0.001 to 12.0Beryllium0.0001 to 0.01Boron0.0001 to 0.01Cadmium0.0001 to 0.05Calcium0.0005 to 0.05Cerium0.01 to 3.0Chromium0.0002 to 0.005Copper0.001 to 0.05Dysprosium0.01 to 1.0Erbium0.01 to 1.0Gadolinium0.01 to 3.0Iron0.001 to 0.06Lanthanum0.01 to 1.5Lead0.005 to 0.1Lithium0.001 to 0.05Manganese0.001 to 2.0Neodymium0.01 to 3.0Nickel0.0005 to 0.05Phosphorus0.0002 to 0.01Praseodymium0.01 to 0.5Samarium0.01 to 1.0Silicon0.002 to 5.0Silver0.001 to 0.2Sodium0.0005 to 0.01Strontium0.01 to 4.0Tin0.002 to 0.05Titanium0.001 to 0.02Yttrium0.02 to 7.0Ytterbium0.01 to 1.0Zinc0.001 to 10.0Zirconium0.001 to 1.0NOTE1The mass fraction ranges given in the above scope areestimates based on two manufacturers observations and data provided bya supplier of atomic emission spectrometers.The range shown for eachelement does not demonstrate the actual usable analytical range for thatelement.The usable analytical range may be extended higher or lowerbased on individual instrument capability,spectral characteristics of thespecific element wavelength being used and the availability of appropriatereference materials.1.2 This test method is suitable primarily for the analysis ofchill cast disks as described in Sampling Practice B953.Otherforms may be analyzed,provided that:(1)they are sufficientlymassive to prevent undue heating,(2)they allow machining toprovide a clean,flat surface which creates a seal between thespecimen and the spark stand,and(3)reference materials of asimilar metallurgical condition(spectrochemical response)andchemical composition are available.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.Specific safety andhealth statements are given in Section 10.2.Referenced Documents2.1 ASTM Standards:2B953 Practice for Sampling Magnesium and MagnesiumAlloys for Spectrochemical AnalysisE135 Terminology Relating to Analytical Chemistry forMetals,Ores,and Related MaterialsE305 Practice for Establishing and Controlling AtomicEmission Spectrochemical Analytical CurvesE406 Practice for Using Controlled Atmospheres in Spec-trochemical AnalysisE826 Practice for Testing Homogeneity of a Metal Lot orBatch in Solid Form by Spark Atomic Emission Spec-trometryE1257 Guide for Evaluating Grinding Materials Used forSurface Preparation in Spectrochemical AnalysisE1329 Practice for Verification and Use of Control Charts inSpectrochemical AnalysisE1507 Guide for Describing and Specifying the Spectrom-eter of an Optical Emission Direct-Reading Instrument1This test method is under the jurisdiction of ASTM Committee B07 on LightMetals and Alloys and is the direct responsibility of Subcommittee B07.04 onMagnesium Alloy Cast and Wrought Products.Current edition approved Oct.1,2015.Published November 2015.Originallyapproved in 2007.Last previous edition approved in 2007 as B954 07.DOI:10.1520/B0954-15.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.Terminology3.1 DefinitionsFor definitions of terms used in this testmethod,refer to Terminology E135.3.2 Definitions of Terms Specific to This Standard:3.2.1 binary type calibrationcalibration curves deter-mined using binary calibrants(primary magnesium to whichhas been added one specific element).3.2.2 global type calibrationcalibration curves deter-mined using calibrants from many different alloys with con-siderable compositional differences.3.2.3 alloy type calibrationcalibration curves determinedusing calibrants from alloys with similar compositions.3.2.4 two point drift correctionthe practice of analyzing ahigh and low standardant for each calibration curve andadjusting the counts or voltage values obtained back to thevalues obtained on those particular sta