ASTM B 566 � 04a(ENGLISH)

Designation:B566–04aStandardSpecificationforCopper-CladAluminumWire1ThisstandardisissuedunderthefixeddesignationB566;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheDepartmentofDefense.1.Scope1.1Thisspecificationcoversbareroundcopper-cladalumi-numwireforelectricalapplications.1.2Fourclassesofcopper-cladaluminumwirearecoveredasfollows:Class10A—Nominal10volume%copper,annealed.Class15A—Nominal15volume%copper,annealed.Class10H—Nominal10volume%copper,hard-drawn.Class15H—Nominal15volume%copper,hard-drawn.1.3Thevaluesstatedininch-poundunitsaretoberegardedasthestandard,exceptforresistivityanddensity,wheretheSIunitsarethestandard.Thevaluesgiveninparenthesesareforinformationonly.2.ReferencedDocuments2.1Thefollowingdocumentsoftheissueineffectondateofmaterialpurchaseformapartofthisspecificationtotheextentreferencedherein:2.2ASTMStandards:2B193TestMethodforResistivityofElectricalConductorMaterialsB258SpecificationforStandardNominalDiametersandCross-SectionalAreasofAWGSizesofSolidRoundWiresUsedasElectricalConductors2.3NationalInstituteofStandardsandTechnology:3NBSHandbook100—CopperWireTables3.Terminology3.1DefinitionsofTermsSpecifictoThisStandard:3.1.1lot—alotisanyamountofwireofoneclassandsizepresentedforacceptanceatonetime;suchamount,however,nottoexceed100productionunits.3.1.2sample—aquantityofproductionunits(coils,reels,andsoforth)selectedatrandomfromthelotforthepurposeofdeterminingconformanceofthelottotherequirementsofthisspecification.3.1.3specimen—alengthofwireremovedfortestpurposesfromanyindividualproductionunitofthesample.4.OrderingInformation4.1Ordersformaterialunderthisspecificationshallincludethefollowinginformation:4.1.1Quantityofeachsizeandclass;4.1.2Wiresize,diameterininches(seeSection7andTable1);4.1.3Classofwire(see1.2andTable1);4.1.4Packagingandshipping(Section14andpackaginginspectionifrequired,13.1);and4.1.5Placeofinspection(see13.1).5.MaterialsandManufacture5.1Thewireshallconsistofacoreofaluminumwithacontinuousoutercladdingofcopperthoroughlybondedtothecorethroughoutandshallbeofsuchqualityastomeettherequirementsofthisspecification.6.GeneralRequirements6.1TensileStrengthandElongation—Thecopper-cladalu-minumwireshallconformtothetensilestrengthandelonga-tionrequirementsofTable1.ForintermediatediametersnotlistedinTable1,theelongationrequirementsofthenextsmallersizeshallapply;inthecaseoftensilestrengththerequirementsofthenextlargersizeshallapply.6.2Resistivity—Theelectricalresistivityatatemperatureof20°CshallnotexceedthevaluesprescribedinTable2.SeeNote1forcalculatingelectricalresistance.NOTE1—RelationshipswhichmaybeusefulinconnectionwiththevaluesofelectricalresistivityprescribedinthisspecificationareshowninTable3.ResistivityunitsarebasedontheInternationalAnnealedCopperStandard(IACS)adoptedbyIECin1913,whichis1⁄58V·mm2/mandthevalueof0.15328V·g/m2at20°Care,respectively,theinternationalequivalentofvolumeandweightresistivityofannealedcopperequalto100%conductivity.Thelatertermmeansthatacopperwire1minlengthandweighing1gwouldhavearesistanceof0.15328V.Thisisequivalenttoaresistivityvalueof875.20V·lb/mile2,whichsignifiestheresistance1ThisspecificationisunderthejurisdictionofASTMCommitteeB01onElectricalConductorsandisthedirectresponsibilityofSubcommitteeB01.06onCompositeConductors.CurrenteditionapprovedSept.1,2004.PublishedSeptember2004.Originallyapprovedin1972.Lastpreviouseditionapprovedin2004asB566–04.2ForreferencedASTMstandards,visittheASTMwebsite,@astm.org.ForAnnualBookofASTMStandardsvolumeinformation,refertothestandard’sDocumentSummarypageontheASTMwebsite.3AvailablefromNationalInstituteofStandardsandTechnology(NIST),100BureauDr.,Stop3460,Gaithersburg,MD20899-3460.1Copyright©ASTMInternational,100BarrHarborDrive,POBoxC700,WestConshohocken,PA19428-2959,UnitedStates.ofacopperwire1mileinlengthweighing1lb.Itisalsoequivalent,forexample,to1.7241μV/cmoflengthofacopperbar1cm2incrosssection.AcompletediscussionofthissubjectiscontainedinNBSHandbook100.TheuseoffivesignificantfiguresinexpressingresistivitydoesnotimplytheneedforgreateraccuracyofmeasurementthanthatspecifiedinTestMethodB193.Theuseoffivesignificantfiguresisrequiredforcompletereversibleconversionfromonesetofresistivityunitstoanother.6.3Cohesion—Thecopper-cladaluminumwire,whentestedinaccordancewith10.4,shallbefreefromseamsorsplits.Examinationofthewireshallbemadeatamagnificationnottoexceed103.6.4Adhesion—Thecopper-cladaluminumwire,whentestedinaccordancewith10.5,shallbefreefromcladdingdelamination.Examinationofthewireshallbemadeatamagnificationnottoexceed103.6.5Joints—Thefinishedwireshallcontainnojointsorsplices.6.6CopperThickness—Theminimumcopperthickness,whentestedinaccordancewith10.6,shallbenotlessthanthefollowing:6.6.1Class10Aand10Hwireshallhaveaminimumthicknessofnotlessthan3.5%ofthewireradi