ASTM B452-2002 铜包钢线标准规范(英文)

Designation:B452–02StandardSpecificationforCopper-CladSteelWireforElectronicApplication1ThisstandardisissuedunderthefixeddesignationB452;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheDepartmentofDefense.1.Scope1.1Thisspecificationcoversbareroundcopper-cladsteelwireforelectronicapplication.1.2Fourclassesofcopper-cladsteelwirearecoveredasfollows:1.2.1Class30HS—Nominal30%conductivityhard-drawn,1.2.2Class30A—Nominal30%conductivityannealed,1.2.3Class40HS—Nominal40%conductivityhard-drawn,and1.2.4Class40A—Nominal40%conductivityannealed.1.3Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.ThevaluesgiveninparenthesesareinSIunits.2.ReferencedDocuments2.1Thefollowingdocumentsoftheissueineffectonthedateofmaterialpurchaseformapartofthisspecificationtotheextentreferencedherein:2.2ASTMStandards:B193TestMethodforResistivityofElectricalConductorMaterials2B258SpecificationforStandardNominalDiametersandCross-SectionalAreasofAWGSizesofSolidRoundWiresUsedasElectricalConductors22.3NationalInstituteofStandardsandTechnology:NBSHandbook100—CopperWireTables33.OrderingInformation3.1Ordersformaterialunderthisspecificationshallincludethefollowinginformation:3.1.1Quantityofeachsizeandclass,3.1.2Wiresize,diameterininches(see5.3andTable1),3.1.3Classofwire(see1.2andTable1),3.1.4Packagingandshipping(Section10),3.1.5Ifinspectionisrequired(see6.3.3),and3.1.6Placeofinspection(see6.1).4.Material4.1Thewireshallconsistofacoreofhomogeneousopen-hearth,electric-furnace,orbasic-oxygensteelwithacontinuousoutercladdingofcopperthoroughlybondedtothecorethroughoutandshallbeofsuchqualityastomeettherequirementsofthisspecification(Note1).NOTE1—Thecopper-cladsteelwireprovidesahigh-strengthconductorforuseinwireandcablewheregreaterstrengthisrequiredandalowerconductivitycanbetolerated.Athighfrequenciesthereducedconductiv-ityislesspronouncedduetoconcentrationofthecurrentintheouterperipheryofthewire.Minimumthicknessof6%and10%oftheradiusfor30and40%conductivitymaterial,respectively,hasbeenestablishedtofacilitatetheinspectionofthicknessonfinewires.5.GeneralRequirements5.1TensileStrengthandElongation—Thecopper-cladsteelwireshallconformtothetensilestrengthandelongationrequirementsofTable1.ForintermediatesizesnotlistedinTable1,theelongationrequirementsofthenextsmallersizeshallapply;inthecaseoftensilestrength,therequirementsofthenextlargersizeshallapply.5.2Resistivity—Theelectricalresistivityatatemperatureof20°CshallnotexceedthevaluesprescribedinTable2.SeeNote2forcalculatingelectricalresistance.NOTE2—RelationshipswhichmaybeusefulinconnectionwiththevaluesofelectricalresistivityprescribedinthisspecificationareshowninTable3.ResistivityunitsarebasedontheInternationalAnnealedCopperStandard(IACS)adoptedbyIECin1913,whichis1⁄58V·mm2/mat20°Cfor100%conductivity.Thevalueof0.017241V·mm2/mandthevalueof0.15328V·g/m2at20°Carerespectivelytheinternationalequivalentofvolumeandweightresistivityofannealedcopperequalto100%conductivity.Thelattertermmeansthatacopperwire1in.inlengthandweighing1gwouldhavearesistanceof0.15328V.Thisisequivalenttoaresistivityvalueof875.20V·lb/mile2,whichsignifiestheresistanceofacopperwire1mileinlengthweighing1lb.Itisalsoequivalent,forexample,to1.7241μV/cmoflengthofacopperbar1cm2incrosssection.AcompletediscussionofthissubjectiscontainedinNBSHandbook100.TheuseoffivesignificantfiguresinexpressingresistivitydoesnotimplytheneedforgreateraccuracyofmeasurementthanthatspecifiedinTestMethodB193.Theuseoffivesignificantfiguresisrequiredforcompletereversibleconversionfromonesetofresistivityunitstoanother.5.3DimensionsandPermissibleVariations—Thewiresizes1ThisspecificationisunderthejurisdictionofASTMCommitteeB01onElectricalConductorsandisthedirectresponsibilityofSubcommitteeB01.06onCompositeConductors.CurrenteditionapprovedApril10,2002.PublishedApril2002.OriginallypublishedasB452–67.LastpreviouseditionB452–93(1998)e1.2AnnualBookofASTMStandards,Vol02.03.3AvailablefromtheNationalInstituteofStandardsandTechnology(NIST),Gaithersburg,MD20899.1Copyright©ASTMInternational,100BarrHarborDrive,POBoxC700,WestConshohocken,PA19428-2959,UnitedStates.shallbeexpressedasthediameterofthewireindecimalfractionsofaninchtothenearest0.0001in.(0.003mm)(Note3).Fordiametersunder0.0100in.(0.254mm),thewireshallnotvaryfromthespecifieddiameterbymorethan60.0001in.(0.003mm)andfordiametersof0.0100in.(0.254mm)andover,thewireshallnotvaryfromthespecifieddiameterbymorethan61%,expressedtothenearest0.0001in.(0.003mm).NOTE3—ThevaluesofthewirediametersinTable1aregiventothenearest0.0001in.(0.003mm)andcorrespondtothestandardsizesgiveninSpecificationB258.Theuseofgagenumberstospecifywiresizesisnotrecognizedinthisspecificationbecauseofthepossibilityofconfusion.AnexcellentdiscussionofwiregagesandrelatedsubjectsiscontainedinNBSHandbook100.5.4AdhesionandOtherDefects—Thecopper-cladste