Designation:B773−96(Reapproved2008)StandardGuideforUltrasonicC-ScanBondEvaluationofBrazedorWeldedElectricalContactAssemblies1ThisstandardisissuedunderthefixeddesignationB773;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.INTRODUCTIONThisguidancedocumentistheresultofaninvestigationbytheASTMCommitteeB04.04TaskForceonUltrasonicBondTestingofElectricalContacts.Althoughultrasonicinterrogationiswidelyemployedasanon-destructiveevaluationmethod,itsapplicationtothetestingofelectricalcontactbondsrequiresspecifictechniques.2,3Thedesiretostudythevariationoftechniqueanditseffectupontestresultswasresponsibleforaround-robintestprogram.Theprogramwasconductedintwophasesinanattempttostandardizepracticeswhichwouldimprovetestingagreement.Thisstudyprovidedanalysisandsuggestionsforreducingthevariabilityoftestresults.Thedecisionofthecommitteewastopublishasummaryofthisinformationtoserveasguidelinesforwritingspecificationsthatwillincorporatepractices.1.Scope1.1Thisguidedescribesultrasonictestingproceduresthatcanbeusedforevaluatingthebondqualityofelectricalcontactassembliesmanufacturedbybrazingorwelding.1.2Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.ItistheresponsibilityoftheuserofthisstandardtobecomefamiliarwithallhazardsincludingthoseidentifiedintheappropriateMaterialSafetyDataSheet(MSDS)forthisproduct/materialasprovidedbythemanufacturer,toestablishappropriatesafetyandhealthpractices,anddeterminetheapplicabilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:4E214PracticeforImmersedUltrasonicTestingbytheRe-flectionMethodUsingPulsedLongitudinalWaves(With-drawn2007)5E500StandardDefinitionsofTermsRelatingtoUl...
