Designation:C783−85(Reapproved2015)AnAmericanNationalStandardStandardPracticeforCoreSamplingofGraphiteElectrodes1ThisstandardisissuedunderthefixeddesignationC783;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticewasdevelopedforelectric-arcfurnacegraphiteelectrodes,andcoversaprocedureandequipmentforobtainingcoresamplesfromelectrodesinamannerthatdoesnotdestroytheelectrodenorpreventitssubsequentuseasoriginallyintended.However,theminimumelectrodediameter,forwhichextractionofacoresampleusingthispracticedoesnotinfluencesubsequentuse,isinfluencedbytheparticularapplicationandmustbedeterminedbytheuser.Graphiteelectrodesforuseinelectricarcfurnacesareusuallysolidcylindersofgraphitewiththreadedsocketsmachinedineachend.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.NOTE1—ThefollowingASTMstandardsarenotedassourcesofusefulinformation:TestMethodsC559,C611,C651,C747,C1025,andC1039.2.ReferencedDocuments2.1ASTMStandards:2C559TestMethodforBulkDensitybyPhysicalMeasure-mentsofManufacturedCarbonandGraphiteArticlesC611TestMethodforElectricalResistivityofManufacturedCarbonandGraphiteArticlesatRoomTemperatureC651TestMethodforFlexuralStrengthofManufacturedCarbonandGraphiteArticlesUsingFour-PointLoadingatRoomTemperatureC747TestMethodforModuliofElasticityandFundamentalFrequenciesofCarbonandGraphiteMaterialsbySonicResonanceC1025TestMethodforModulusofRuptureinBendingofElectrodeGraphiteC1039TestMethodsforApparentPorosity,ApparentSpe-cificGravity,andBulkDensityofGraphiteElect...
