SAE-AMS2675G-2006

SAETechnicalStandardsBoardRulesprovidethat:“ThisreportispublishedbySAEtoadvancethestateoftechnicalandengineeringsciences.Theuseofthisreportisentirelyvoluntary,anditsapplicabilityandsuitabilityforanyparticularuse,includinganypatentinfringementarisingtherefrom,isthesoleresponsibilityoftheuser.”SAEreviewseachtechnicalreportatleasteveryfiveyearsatwhichtimeitmaybereaffirmed,revised,orcancelled.SAEinvitesyourwrittencommentsandsuggestions.Copyright©2006SAEInternationalAllrightsreserved.Nopartofthispublicationmaybereproduced,storedinaretrievalsystemortransmitted,inanyformorbyanymeans,electronic,mechanical,photocopying,recording,orotherwise,withoutthepriorwrittenpermissionofSAE.TOPLACEADOCUMENTORDER:Tel:[phone](insideUSAandCanada)Tel:[phone](outsideUSA)Fax:[phone]Email:[e-mail]::1.1Purpose:Thisspecificationcoverstheengineeringrequirementsforproducingbrazedjointsinpartsmadeofsteels,ironalloys,nickelalloys,andcobaltalloysbyuseofnickelalloyfillermetal.1.2Application:Thisprocesshasbeenusedtypicallyforjointsrequiringhighstrengthandcorrosionandoxidationresistanceupto1200°F(649°C),butusageisnotlimitedtosuchapplications.2.APPLICABLEDOCUMENTS:Theissueofthefollowingdocumentsineffectonthedateofthepurchaseorderformsapartofthisspecificationtotheextentspecifiedherein.Thesuppliermayworktoasubsequentrevisionofadocumentunlessaspecificdocumentissueisspecified.Whenthereferenceddocumenthasbeencanceledandnosupersedingdocumenthasbeenspecified,thelastpublishedissueofthatdocumentshallapply.AEROSPACEMATERIALSPECIFICATIONAMS2675GIssuedNOV1952RevisedAPR2002ReaffirmedSEP2006SupersedingAMS2675FAMS2675GSAEAMS2675G-2-2.1SAEPublications:AvailablefromSAE,400CommonwealthDrive,Warrendale,PA15096-0001or°F(977to1077°C)Solidus-LiquidusRange2.2ASMEPublications:AvailablefromASME,Order/Inquiries,P.O.Box2300,Fairfield,NJ07007-2300or:3.1Materials:3.1.1FillerMetal:ShallconformtoAMS4775,unlessotherwisespecified.(See8.2).3.1.2Flux:Pasteorliquidfluxesshallnotbeused,unlessagreeduponbypurchaser.3.2Equipment:Furnaces,withsuitableprotectiveatmospheresasdefinedin3.3,shallbeusedforbrazingunlesselectricalinduction,electricalresistanceheating,orothermethodispermittedbypurchaser.Wherebrazingisconcurrentwithheattreatment,thepyrometryrequirementsoftheapplicableheattreatmentspecificationshallbeapplied.Otherwise,pyrometryshallbeinaccordancewithAMS2750.3.3Atmospheres:Acceptablefurnaceatmosphereforbrazingshallbeasfollows:3.3.1Hydrogenofnotlessthan99.99%purityanddewpointnothigherthan-25°F(-32°C).3.3.2Argonofnotlessthan99.99%purityanddewpointnothigherthan-35°F(-37°C).3.3.3Mixturesofargonandhydrogeninanyproportions,thehydrogenpuritybeingasspecifiedin3.3.1,theargonpuritybeingasspecifiedin3.3.2,andthedewpointofthemixturebeingnothigherthan-35°F(-37°C).3.3.4Vacuumof5x10-3Torrorbetter(lowerpressure).Back-filltoahigherpressuremaybeachievedwithanon-oxidizingatmosphere(See3.3.2or3.3.3).--``,,`,,,`,,``````,,,,``,`,``-`-`,,`,,`,`,,`---AMS2675GSAEAMS2675G-3-3.4Preparation:3.4.1SurfaceCondition:Thesurfacestobejoinedshallbecleanpriortoassembly(See8.5).3.4.2NickelPlating:Unlessotherwisespecified,jointsshallbepreparedasnotedinTable1bynickelplatinginaccordancewithAMS2403orAMS2424.3.4.2.1Unlessotherwisespecified,nickelplatingonareasotherthanthefayingsurfaceandadjacentfilletisoptionalandmaybeincomplete.3.4.3Assembly:Thepartstobejoinedshallbeassembledsothattheclearancesbetweenmatingsurfacesarewithinspecifiedtolerances.Whenjointtolerancesarenotspecified,thejointclearanceshallbe0.001to0.004inch(25to102µm),(See8.2).Whenpermittedbypurchaser,tackweldingmaybeusedtofacilitateassembly.Theassemblyshallbesupportedsothatthepartswillbeinproperalignmentthroughoutthebrazingprocess.Sufficientfillermetalshallbeplacedatoneendofthejoint.Inthecaseofblindjoints,thefillermetalshallbepreplacedattheblindendofthejoint.3.4.4Fluxing:Whenuseofpasteorliquidfluxispermitted,fluxshallbeappliedtothejointareasofparts.Gaseoushydrogenfluoridepre-cleaning/fluxingmaybeperformed,whenpermittedbypurchaser.TABLE1-NickelPlatingThicknessRequirementsforFurnaceAtmosphereAlloyNickelPlatingThicknessInch(µm)VacuumNickelPlatingThicknessInch(µm)Non-OxidizingGasPrecipitationHardenableIronAlloysPrecipitationHardenableNickelAlloys(a)Ti+Alcontentunder4%nominal(b)Ti+Alcontent4%nominalorgreaterNon-precipitationHardenableNickelAlloyswithTi+Alcontentunder1%nominalAllotherAlloys0.0001to0.0006(2.5to15)0.0001to0.0006(2.5to15)0.0001to0.0006(2.5to15)Optionalto0.0006(15),maxOptionalto0.0006(15),max0.0004to0.0006(10to15)0.0004to0.0006(10to15)0.0008to0.0012(20to30)0.0001to0.0006(2.5to15)Optionalto0.0006(15),maxAMS2675GSAEAMS2675G