ASTM_E_1086_-_14.pdf

Designation:E108614Standard Test Method forAnalysis of Austenitic Stainless Steel by Spark AtomicEmission Spectrometry1This standard is issued under the fixed designation E1086;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 method2covers the analysis of austeniticstainless steel by spark atomic emission vacuum spectrometryfor the following elements in the ranges shownElementComposition Range,%Chromium17.0to 23.0Nickel7.5to 13.0Molybdenum0.01to 3.0Manganese0.01to 2.0Silicon0.01to 0.90Copper0.01to 0.30Carbon0.005 to 0.25Phosphorus0.003 to 0.15Sulfur0.003 to 0.0651.2 This test method is designed for the routine analysis ofchill-cast disks or inspection testing of stainless steel samplesthat have a flat surface of at least 13 mm(0.5 in.)in diameter.The samples must be sufficiently massive to prevent overheat-ing during the discharge and of a similar metallurgical condi-tion and composition as the reference materials.1.3 One or more of the reference materials must closelyapproximate the composition of the specimen.The techniqueof analyzing reference materials with unknowns and perform-ing the indicated mathematical corrections may also be used tocorrect for interference effects and to compensate for errorsresulting from instrument drift.A variety of such systems arecommonly used.Any of these that will achieve analyticalaccuracy equivalent to that reported for this test method areacceptable.1.4 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.2.Referenced Documents2.1 ASTM Standards:3E135 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 AnalysisE1060 Practice for Interlaboratory Testing of Spectrochemi-cal Methods of Analysis4E1329 Practice for Verification and Use of Control Charts inSpectrochemical AnalysisE1806 Practice for Sampling Steel and Iron for Determina-tion of Chemical Composition2.2 Other ASTM Documents:ASTM MNL 7 Manual on Presentation of Data and ControlChart Analysis53.Terminology3.1 DefinitionsFor definitions of terms used in this testmethod,refer to Terminology E135.4.Summary of Test Method4.1 A controlled discharge is produced between the flatsurface of the specimen and the counter electrode.The radiantenergy of selected analytical lines are converted into electricalenergies by photomultiplier tubes and stored on capacitors.Thedischarge is terminated at a predetermined level of accumu-lated radiant energy from the internal standard iron line or aftera fixed integration time.At the end of the integration period,the charge on each capacitor is measured,and displayed orrecorded as a relative energy or mass fraction%.5.Significance and Use5.1 The chemical composition of stainless steels must bedetermined accurately to ensure the desired metallurgical1This test method is under the jurisdiction of ASTM Committee E01 onAnalytical Chemistry for Metals,Ores,and Related Materials and is the directresponsibility of Subcommittee E01.01 on Iron,Steel,and Ferroalloys.Current edition approved March 1,2014.Published April 2014.Originallyapproved in 1985.Last previous edition approved in 2008 as E1086 08.DOI:10.1520/E1086-14.2Supporting data have been filed at ASTM International Headquarters and maybe obtained by requesting Research Report RR:E02-1023.3For 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.4Withdrawn 1997.5ASTM Manual Series,ASTM International,8th edition,2010.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 properties.This procedure is suitable for manufacturing controland inspection testing.6.Apparatus6.1 Sampling and Sample Preparation Equipment:6.1.1 Refer to Practice E1806 for devices and practices tosample liquid and solid steel.6.1.2 Abrasive Grinder,a suitable belt grinder,horizontaldisk grinder,or similar grinding apparatus.The resultingsurface should be uniformly plane and free of defects.Thesemay be either wet or dry grinding devices.Grinding materialswith grit sizes ranging from 60 to 180 have been foundsatisfactory.6.2 Excitation Source,with parameters capable of produc-ing a usable spectrum in accordance with 11.1.6.3 Excitation Stand,suitable for mounting in opticalali