MIL-C-26074D

MIL-C-26074C3MYles5MILITARYSPECIFICATIONThisspecificationieapprovedforwebyallDepartfmntaandAgencie8oftheOapartmmtofDefense.1.SCQPS1.1-.Thisspecificationcoverstheraquira!mntaforelactreless(autecat.dyticchemicalmxhxtion)depositionofnickelornickelcoatingsonsmtaleurfaces.1.2Claasificatio~inaccordancewithThenickelseatingsshallbeclassified1.2.1Classesthethe=hatuentapplidsubsequenttoplating.Claas1-Aeplated,nosubsequentheattreatrmnt.AWeforhydrogeneubrittlenmntreliefisnotconsideredaheattreatnmnt.class2-Neattreatedtaobtainrequiredhardness.Maybeusedonal1nstalsnotaffectedbyheatingtaS00%andabove.Cleas3-Aluminumalloysnonheat-treatable,andberylliumalloysprocessedtoirqmwveadhesionofthenickeldeposit.Claas4-Aluminmalloys,heat-treatable,adhesionofthenickeldeposit.processedtoisproveSaneficialcommnte(recormsindatione,additions,deletions)andanypertinentdata+ichsaybeofuseininprovingthisdocumntaheuldbeaddressedt.e:ASD/=,Wight-PattersonAFSOH45433-6503,bywingtheself-addressedStandardizationOsctmmntIuproveremtproposal(DDForm1426)appearingattheendofthisdocumntorbyletter.ArlscN/AARSAWFTgIS1’RISUl’IONS1’ATEhEtWA:Approvedforpublicrele=e,lmlimited.distributionisDownloaded from http://www.everyspec.com

MIL-C-26074D1.2.2Grades.Thenickelcoatingsshallbeofthefollowinggrades:(lradeA-O.0010-inchminimumthicknessGradeB-0.0005-inchminimumthicknessGradeC-0.0015-inchminimumthickness2.APPLICABLEDOCUklENTS2.1Governmentdocuments2.1.1Specificationsandstandards.Thefollowingspecificationsandstandardsformapartofthisdocumanttotheextentspecifiedherein.Unlessotherwisespecified,theissuesofthesedocumentsarethoselistedintheissueoftheDepartmentofDefenseIndexofSpecificationsandStandards(DODISS)andsupplementthereto,citedinthesolicitation(ace6.2)SPECIFICATIONSMILITABYMIL-I-13165ShotPeeningofMetalPartsSTANDABDSMILITARYMIL-STD-105SamplingProceduresandTablesforInspectionbyAttributesMIL-STD-1949Inspection,MagneticParticle(Unlessotherwiseindicated,copiesofthemilitaryspecificationsandstandardsareavailablefromtheNavalPublicationsandFormaCenter,(ATTN:NPODS),5801TaborAvanue,Philadelphia,PA19120-5099.2.2pJon-GovernmentDublications.Thefollowingdocumentsformapartofthisdocumenttotheextentspecifiedherein.Unlessotherwisespecified,theissuesofthedocumentswhichareDoDadoptedarethoselistedintheissueoftheDODISSspecifiedinthesolicitation.Unlessotherwisespecifiad,theissuesofdocumentsnot1istedintheDODISSaretheissuesofthedocumentscitedinthesolicitation(see6.2).AMSRICANSOCIETYFORTESTINGANDMATERIALS(ASTM)ASTMB487MeasurementofMetalandOxideCoatingsThicknessbykfiCrOSCODiCalExaminationofaCrossSection,Methodfor(DoDadopted)ASTMB499StandardTestMethodforMeasurementofCoatingThicknessbytheMagneticMethod:NonmagneticCoatingsonMagneticBasisMetals(DoDadopted)2Downloaded from http://www.everyspec.com

hfIL-C-26074DASl%fB568X-REVSpSctreuetry(DoD13dOptSd)SIBfE18ReckwllNerdnessandRocIns311SuperficialNsrdnessofhbtallicMaterials,Test8for(DsDadopted)AsruE384-84MicrohardnessofMaterials,Testt&thodforAsmFS19NhchanicalI&iragenFnbrittlementTestingofPlatingprocessesandAircraft!bintaanceChemi&ale(DoDadopted)(ApplicationforcepiesshouldbeaddressedtotheAmeriaanSociotyforTestingandMaterials,1916RaceStreet,Philadelphia,PA19103-1137.)2.3OrderofDracadence.Intheeventofaconf1ictbetmmenthetextofthisdecumntendthereferencescitedherein.thetextoftbiedosumnttakesprecedence.Nothinginthisd—nt,h-ver,etpersedesappliaablela=endregulationsunleesaspecificexemptionhsabeenobtained.3.REQUIRRQ71’S3.1*terials3.1.1&lsisSetal.Thecoatingfmyhusedoniron,ceppar,alisninum,nickel,cobalt,berylliumendtitanitnsWadalloys.3.1.2‘J’ensilestranxth.Al1steelpartshavingenultimatetensilestrengthof220.000pei,orabeve,shal1notbeceatedvdthoutapprovaloftheprocuringactivity.3.2p-acoatinasrocedwes3.2.1Qenera1raauirements.3.2.1.1Unlessotherwisespecified,partsshallbecleaned,pickled,orotherwisepreheatedsenecessary.3.2.1.1.1blessapprovedbytheprocuringactivity,highstrengthsteelsabcweRockwellC40hardnessshal1notbesubjectedtaacidpickling.3.2.1.2Unlessotherwisespecified,thecoatingshel1beappliedafteral1basismetalhaattreatmntsandumhanicaloperations*asmachining,brazing,wlding,formingandperforatingoftheparthavabeencenpletad.3.2.1.3XardneseImasurenmnt.Friortocoating,eteelpertaahal1be-~-for~eSSinaccordancewithASPfdE-18.3.2.2~trasereliefheattreatfmmt.Priortacleaningandcoating,al1stealpartahavingahardnessgreaterthanRockwml1C40shal1begivenaetress-reliefheattraatmantataterqmraturethatsd11producemxsisunstressrellefwithc.utreducingthehardnesstalessthanthespecifiedminim.m3.2.3Shotseenin~.Priortocoating,allsteel~tehavingahardnessofReckl1C40,orabove,andaredesignedforunlimitedlifetierdynamicloada,shal1beshotpeanadinacordancewithMIL-S-13165.Unlessotherwiea3Downloaded from http://www.everyspec.com

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MIL-C-26074D4.3.1In.elJectionlot.Alotshal1consistofcoatedpartsoftheaanmtypeandclass,sambasisnmtal,andofapproxirmtelytheS-sizeendshape,coatedunderthessuaconditionsandbymariaofthesamcoatingprocess,andsubmittedforacceptanceatonetium.4.3.2SemratesueCimm.WhenthecoatedpWtB-ofsuchformastObe.notreadilyadaptabletoatestspecifiedherein,oratthediscretionoftheinepacterfordestrwtivetestsforthesanplingofemal1lotsizes,thetestmaybetiebytheuaeofseparatespecinkmacoatedconcurrent1ywiththepartsrepresented.Theseparate~iimneEhal1kofa-isImtalequivalenttothatofthepartsrepresented.“Equivalent”basismtalincluieschemicalconpowitionandfinishofsurfacepriortocoating.Foreale.acold-rolladsteelsurfaceshal1notbeusedtarepresentahot-rolledsteelsurface;owingtotheiupracticabi1ityofforgingoraaatingseparatetestspscirmnc,hot-rolledsteelspecimnameybeueedtorepresentforgedandcaststeelparte.Theseparatespecimeneshal1bestripeaPproxirmtelyl-inchwide,4incheslong,and0.04-inchthickexceptthoser-redfOrdetertimtionofenbrittlemantrelief(see4.5.4).Thesespecimnashal1beintrcdwsdintoalotatregularintervalspriortothecleaningoperationpreliminerytocoatingandshal1notbeseparatedtherefromumti1aftercompletionoftheprocessing.4.4Qualitvconformanceinspection.Oualityconformanceinspsctionaahal1consistofssnplingplansA,B,CandD.4.4.1SanulingDlenA-Saimlingre’ocsduresforvisualexandnationandnondestructivetestsofcoatingthickness.Sanplesshallbeselectedfromeachlot(see4.3.1)andacceptanceofthelotahal1bedeterminedinaccordancewithinspectionlevelIIandacceptablequalitylevel(#@L)1.5ofMIL-Sl’D-105.Periedicthicknessandadhesiontestsnaytaperforrmdteverifyconpsrablenondestructivetestssoaatoassureproperpr6cesscontro1.4.4.I.1Visuelinsvsction.Sschofthesanplepartsselectedinaccordancewith4.4.1shal1bsexaminedvisuellYforconformancetorequirermntsof3.6.2.4.4.1.2Thickness(nondestrwztivetests).Eachofthese.nple~tsselectedinaccordancewith4.4.1shal1beinapectsdandthecoatingthicknessrmasuredinseverallocationsoneachpartinaccordancewith4.5.1.2.Thepartahal1beconsidersdnonconformingifoneornmrenmacuremntfai1toraetthespecifisdmininumthickness.4.4.2E&wlinfiDlanB-~litiDrocsduresforevaluetin.ehvdrofienenkn.ittlemntreliefdestructivetests-Classes1and2.Ahydrogenembrittlemntrelieftestsh+l1bermoncepernmnth,esspecifiedin4.5.4.4.4.3.%nmlingDlarlc-sanQlinffDrecsdureforadhesiontestsanddestrwtivetestsofcoatinfithickness.Arandomsanpleoffourpartsshel1beselectedfromeachinspectionlot(see4.3.1)orfourseparat.elycoatedapecimansshsl1bepreparedinaccordancewith4.3.2torepresenteachinspectionlot.Ifthenumbsrofpartsinaninapactionlotisfourorless,thenunberofpartsinthesampleshal1bedetermtnadbytheprocuringactivityOFshal1belefttothediscretionoftheinspector.6Downloaded from http://www.everyspec.com

-...,bUL-C-20074D4.4.3.1‘J’hickne#s(destrwtive)teat.2achpartshallbetistdinaccordancewith4.5.1.1inseverallocations.Ifthecoatingthicknessatanyplaceenanypertislessthantheapacifiadthickness,thelotshallberejected.4.4.3.2Pdhesiom.Thepartsusedforthethicknesstast(4.4.3.1)maybeueadasepecinxmefortheadhesiontastespecifiedin4.5.2providedtheyaraofSuitable.eizeandformFailureofoneormraofthetatspacirmneshallconstitutefailu.aofthelot.4.4.4~lindDltVlD-%nmlinnoreceduraforhardneesteet.AllCISSS2coatedpartaselectedfrom4.3.1ehal1beSubjectedtoahardrmsatestinaccordancewith4.5.3.4.5~thodaofinepactiOQ4.5.1~ickneaateat4.5.1.1plicroscepic!mthed.Thecoatingthicknessshal1bedeterminedin=ccIti=withW17dB487.4.5.1.2.Inatrunmntmthod.Theinatrwmntused,itscalibration,anditsoperationfortestinggivenpartsshal1besuhthatthecoatingthicknessshallbedeterminedwithI1Opercentofitat-thickness:ortheinetrumntshal1beofatypeapprovedbytheprocuringactivity(see6.4).Thecoatingthicknessehal1bedeterminedinaccordancewithASTMB499.4.5.2Mhesiontist.Thetestspacitmnehal1bebent180degreaeoveramandreldiamter4tirmsthethickness(1cmminisx.anloftheapecinnnandexamlnadat4Xpewarmagnificationforflakingorseparationoftheinterface.Itshal1thentiispessibletodetachanyappreciablemaeofthecoatingwithasharpinetrtare.ntontheoutsideradius‘ofthebenttestspecinm.Whenthecoatedpartsarenotraadilyadaptabletothebenttest,adhesionmaybedeterminedonthecoatedpartbycuttingthecoatingfromthe-ismet.slattheinterfaceincontinuouspathandexaminedaaabove.4.5.3)f=mdnesatests.Vickershardnessue.aememntsshal1beinaccordancewithASTME384forclass2coating.e.4.5.4~ittlenmntrelief.Cespliancewfth3.4.1shal1bedeterminedwithaanplesofplatedparts.Partesuchaespringpina,leekrings,etc.vMchareinstalledinholesorrede,shallbesimilarlyassembledwingtheapplicablepartsapacificationsordrawingtolerancesvhichisposethermxisusauatainadtensileloadontheplatedpart.The#electedaasplesshal1besubjectedtoasustainedtensileloadequalto115percentofthemaxim.undesignyieldloadforuhichthepart-designed.Testingahal1cenformtoAS1’MFS19.PartsedIichrequirespecialfisturas,qxtranmloadsbconplywiththeabeveraqulremmts,orvdierathenuximmdesignyieldloadisnetlmovm,mayberepresentedbyeeparateapecisnna.Thenotchedrolesofs~l1~aWectedtoasustainedtensileloadequalto75percenttheU1timtenotchtenailestrengthofthesatarial.Thearticles,7.Downloaded from http://www.everyspec.com

MIL-C-26074Dpartsorspecimensshal1beheldunderloadforatleast200hoursandthenexaminedforcracksorfracture.Inspectionofpartsforcracksinthebasismetalandthecoatingshal1beinaccordancewithMIL-STD-1949usingthefluorescentmagneticparticlemethod.Thelotshal1berejectedifanycoatedpartdevelopscracks.5.PACKAGING5.1Coatedsurfacesshal1beprotectedfromdamageduringshipmentandstorage.6.MOTES(Thissectioncontainsinformationofageneralorexplanatorynaturethatmaybehelpful,butisnotmandatory.)6.1Intendeduses.Thecoatingisintendedforucewhenhardandsmoothsurfacesarerequiredoncoatedparts.Excellentuniformdepositsareproducedonirregularparts.Coatedparts,suchasusedinaircompresaorsomissilefuelinjectorplates,pumps.reciprocatingsurfaces.etc.,areprotectedfromoxidation,corrosionandwaar.Withaluminumelectronicdevices,notonlyisproductcontaminationprevented,butthecoatedpartsfaci1itatesoldering.Coatedpartsofstainlesssteelsimilarlyfacilitatebrazing.6.2Acquisitionrequirements.Acquisitiondocumentsshouldspecifythefollowing:a.Title,numberanddateofthespecification.b.Classandgrade,andheattreatmentorcondition(see1.2and3.5).c.IssueofDODISStobecitedinthesolicitation,andifrequired,thespecificissueofindividualdocumentsreference(see2.1.1and2.2).d.Methodofdeterminingcompliancewith4.3.6.3Coatinghardness6.3.1Requiredhardnessonclass2coatingonsteelal10YSmaybeachievedbyheatingperthefollowingbakingschedule:‘F,TemperatureW5004ormore5502ormore6501ormore7500.5ormore6.3.2Coatinghardnessonnickel,copper,cobaltandtitaniumbasedal10YScanbeachievedhyheatingat650°Fi10°F(343°Ci6°C)fOr1to1-1/2hours.sDownloaded from http://www.everyspec.com

MfL-C-2607406.4W@estrutivethicknessmwwrenwnts.Thicknessrmaclnwnmntsofelectrolessnickelcoatingscontainingnrxwthan8percentphocphorouearesufficientlynonmagnetictobefmesuredforthicknessinaccordancewithWhf99,MethedofMeasurermntofCoatingThicknessbytheMagnetichlethed:Norms.gneticCoatingsonWgnetic%eiaMetals,ifdepositedona~eticbaeismetal.Whenemesuringheat-treatedcoatingecontainingaxmethan8percentphosphorous,theinetrumntshouldbeoalibratedagainetheat-treatedatan&mdcofboemcoatingethickn*sserequivalentcalibrationfoils.Heattreatrmntincreasescoatingnagnotiunbb43asurenx3ntofelectrolessnickelcoatingscontaininglessthan8percentphoaphorouebyanagneticIU3thedianotreoonmmnded.6.5Subjectterm(kevvnrd)11stin~.Inickelelectmless(aut4xatalyticchemioalredution)6.6&+cvcledmaterial.Itisencouragedthatrecyclednnterialbewedahenpracticalealongeaitmetetherequiram?mteofthedocumnt4aee3.1).6.7Changesfmmmevioueissl.leq.Aateriske(orvertical1ines)arenotucedinthisrevisiontoidentify&W&tie:recpecttathepreviousissuedutotheextensivenessofcustodians:AirForce-11%elnlri~activity:W-MRAirForce-11Navy-sPmjectNo.WFP-0407Reviewers:AirForce-63,84,99Navy-sNAt-q+-MI,ARUtters:NaVy-oshqf-bE9Downloaded from http://www.everyspec.com

=ANDARDIZATIDN.DOCUMENTN’JMBEnZWCUMEM1DOCUMENTIMPROVEMENT(SetInatmrtioru-RfvazeS&jlITLRPROPOSALYIL-C-2607&DCoatings,ElectrolessNickel,rEuirementsForkNAMEorqueul’mlwo011+41U110NaTVMOFOmaAMIEATlONm-VE”oo”u-)oAOO~ss@lY.uLCre,#b,.u?C*)oL&”EnMAMuFAmunu?R09LEMaPuzAREAEN“-dw.,lyl*,0,”.”,-,:-b.~W.dine:c.%=mmmiO.uk1.—%00:IIImEMAnKsIIII:IIILNAMEOPqUSMIWI!Rh.+o-.Pbw&mt)-~8-s.zwc-,.~b.WORKTCLCPMONC-)-0mkn81NlmDEn(~Alu*ILIMOAODW!SS(EX’CDATEO*SIMMIRIDN(V~MDD)IIw&“JY,14zbmm-----..AaMEV80L,I!OITIOUm~ouu.ASD/ENE5UVJQWKIN.,.,-..—.——.--------.m,aM,Downloaded from http://www.everyspec.com

NO~:~timtoXllthformmay1101bUU4ICImqualcopiesofdocumenu,nortorequestAm,dmiations,orrhrificationof-*-uoncumntroatm-.CommenbahuittedmUformdomlcomwibJbIXimplymfhorintionanyprutimofthemferermdAOcunwit(dortouw.ndmmmhmlrwimmmib.IFo14aloMtltkUN)(FolddONMbIk)DEPARTMENTOFlHEAIRFORCEASDjENESWright-PattersonAPBOH45433-6503111111APSOH45433-6503Bus~NEs:NR:mR:,HM~~~cPOSTAGEWILLBEPAIDBYTHEOEPARIWCNTOFTHEAIRFORCEASDtENESWright-PattersonnRoPOSTAGEN6cEE6AnvIFMAILEDINTHEuNITEDSTATES