Designation:F3–02aStandardSpecificationforNickelStripforElectronTubes1ThisstandardisissuedunderthefixeddesignationF3;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecificationcoversnickelstripforuseascathodesorotherelementsinelectrontubes.1.2Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.Themetricequivalentsofinch-poundunitsmaybeapproximate.2.ReferencedDocuments2.1ASTMStandards:B162SpecificationforNickelPlate,Sheet,andStrip2E39TestMethodsforChemicalAnalysisofNickel3E107TestMethodsforChemicalAnalysisofElectronicNickel4E129TestMethodforSpectrographicAnalysisofThermi-onicNickelAlloysbythePowderTechnique4F1SpecificationforNickel-CladandNickel-PlatedSteelStripforElectronTubes5F16TestMethodsforMeasuringDiameterorThicknessofWireandRibbonforElectronicDevicesandLamps5F155TestMethodforTemperofStripandSheetMetalsforElectronicDevices(Spring-BackMethod)6F239SpecificationforNickelAlloyCathodeSleevesforElectronDevices73.PhysicalRequirements3.1Temper—ThetempershallconformtolimitsagreeduponbytheproducerandconsumerwhendeterminedinaccordancewithTestMethodF155.3.2Finish—Thesurfaceshallbeassmoothandfreeofoxide,pits,scratches,seams,slivers,streaks,stains,scale,blisters,edgecracks,trimmingburrs,andotherdefectsorcontaminants,asbestcommercialpracticewillpermitwhenexaminedunder103magnification.4.Dimensions,MassandPermissibleVariations4.1Stripuptoandincluding0.020in.(0.51mm)iscoveredbythisspecification.4.2Stripover0.020in.(0.51mm)iscoveredbySpecifica-tionB162.4.3Thickness—Thethicknessshallconformtothetoler-ancesofTable1.4.4Width—Thewidth,asslit,shallconformtothetoler-ancesofTable2.4.5EdgewiseBow—Theedgewisebowshallbenomorethan0.5in(13mm)in8ft(2.4m).4.6Edge—Theedgeshallbesuchaswouldresultfromastandardslittingoperation.4.7Burr—Theburrshallnotexceedo...
