Designation:E118–89(Reapproved2004)StandardTestMethodsforChemicalAnalysisofCopper-ChromiumAlloys1ThisstandardisissuedunderthefixeddesignationE118;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thesetestmethodscoverproceduresforthechemicalanalysisofchromium-copperalloyshavingchemicalcompo-sitionswithinthefollowinglimits:Copper,%98andoverChromium,%0.6to1.2Silicon,%0to0.10Iron,%0to0.101.2Theanalyticalproceduresappearinthefollowingorder:SectionsCopperbytheElectrolyticMethod8-11ChromiumbytheDichromate(Potentiometric)Method12-15SiliconbythePerchloricAcidDehydrationMethod162.ReferencedDocuments2.1ASTMStandards:2E29PracticeforUsingSignificantDigitsinTestDatatoDetermineConformanceWithSpecificationsE50PracticesforApparatus,Reagents,andSafetyPrecau-tionsforChemicalAnalysisofMetalsE54TestMethodsforChemicalAnalysisofSpecialBrassesandBronzesE55PracticeforSamplingWroughtNonferrousMetalsandAlloysforDeterminationofChemicalCompositionE60PracticeforPhotometricandSpectrophotometricMethodsforChemicalAnalysisofMetalsE62TestMethodsforChemicalAnalysisofCopperandCopperAlloys(PhotometricMethods)3.SignificanceandUse3.1Thesetestmethodsforthechemicalanalysisofmetalsandalloysareprimarilyintendedtotestsuchmaterialsforcompliancewithcompositionalspecifications.Itisassumedthatallwhousethesetestmethodswillbetrainedanalystscapableofperformingcommonlaboratoryproceduresskill-fullyandsafely.Itisexpectedthatworkwillbeperformedinaproperlyequippedlaboratory.4.Apparatus,Reagents,andPhotometricPractice4.1Apparatusandreagentsrequiredforeachdeterminationarelistedinseparatesectionsprecedingtheprocedure.Theapparatus,standardsolutions,andcertainotherreagentsusedinmorethanoneprocedurearereferredtobynumberandshallconformtotherequirementsprescribedinPracticesE50,exceptthatphotometersshallconformtot...
