MIL-C-26074E1.2.2Grades.Thenickelcoatingsshallbeofthefollowinggrades:GradeA-O.0010-inchminimumthickness.GradeB-0.0005-inchGradeC-0.0015-inchminimumthickness.minimumthickness.2.APPLICABLEDOCUMENTS2.1Governmentdocuments2.1.1Specifications,standards,andhandbooks.Thefollowingspecifications,standards,andhandbooksformapartofthisspecificationtotheextentspecifiedherein.Unlessotherwisespecified,theissuesofthesedocumentsshallbethoselistedintheissueoftheDepartmentofDefenseIndexofSpecificationsandStandards(DODISS)andsupplementthereto,citedinthesolicitation.SPECJF.ICA’IIONSMILITARYMIL-S-13165STANDARDSMIUTARYMLL-STD-l05--ShotPeeningofMetalPartsSamplingProceduresandTablesforInspectionbyAttributes(Unlessotherwiseindicated,copiesofthemilitaryspecificationsandstandardsareavailablefromtheStandardizationDocumentsOrderDesk,Building4D,700RobbinsAvenue,PhiladelphiaPA19111-5094).(Copiesofspecifications,standards,handbooks,drawings,publications,andotherGovernmentdocumentsrequiredbycontractorsinconnectionwithspecificacquisitionfunctionsshouldbeobtainedfromthecontractingactivityorasdirectedbythecontractingactivity.)2.2Non-Governmentpublications.Thefollowingdocumentsformapartofthisdocumenttotheextentspecifiedherein.Unlessotherwisespecified,theissuesofthedocuments,whichareDODadopted,arethoselistedintheDODISScitedinthesolicitation.Unlessotherwisespecified,theissuesofthedocumentsnotlistedintheDODMSaretheissuesofthedocumentscitedinthesolicitation(see6.2).2Source: http://www.assistdocs.com -- Downloaded: 2006-08-13T15:05ZCheck the source to verify that this is the current version before use.
MIL-C-26074EAMERICANSOCIETYFORTESTINGANDMATERIALS(ASTM)ASTMB117ASTMB487MethodOfSaltSpray(Fog)TestingMeasurementofMetalandOxideCoatingsThicknessbyMicroscopicalExaminationofaCrossSection,Methodfor(DODadopted)StandardTestMethodforMeasurementofCoatingThicknessbytheMagneticMethod:NonmagneticCoatingsonMagneticBasisMetals(DODadopted)MethodforMeasurementBackscatterMethodX-RaySpectrometryofCoatingThicknessbytheBetaASTMB499ASTMB567ASTMB568ASTMB571ASTMB578ASTME18ASTME384ASTMF519(DODadopted)TestMethodsforAdhesionofMetallicCoatingsTestMethodforMicrohardnessofElectroplatedCoatingsRockwellHardnessandRockwellSuperficialHardnessofMetallicMaterials,Testsfor(DODadopted)MicrohardnessofMaterials,TestMethodforMechanicalHydrogenEmbrittlementTestingofPlatingProcessesand-AircraftMaintenanceChemicals(DODadopted)(ApplicationforcopiesshouldbeaddressedtotheAmericanSocietyforTestingandMaterials,1916RaceStreet,PhiladelphiaPA19103-1137.)(Non-Governmentstandardsandotherpublicationsarenormallyavailablefromtheorganizationswhichprepareorwhichdistributethedocuments.Thesedocumentsalsomaybeavailableinorthroughlibrariesorotherinformationalservices.)2.3OrderofPrecedence.lntheeventofaconflictbetweenthetextofthis.documentandthereferencescitedherein,thetextofthisdocumenttakesprecedence.Nothinginthisdocument,however,supersedesapplicablelawsandregulationsunlessaspecificexemptionhasbeenobtained.3.REQUIREMENTS3.1Materials3.1.1Metalsandcomposites.Iron,copper,aluminum,nickel,cobalt,beryliium,titanium,andtheiralloyscanbeplateddirectly.Compositescanbeplateddirectlybyusingspecialpretreatmenttopreventthebasismaterialfromcontaminatingthebathortoobtainadequatecoatingadhesion.3Source: http://www.assistdocs.com -- Downloaded: 2006-08-13T15:05ZCheck the source to verify that this is the current version before use.
MIL-C-26074E3.1.2Tensilestrermth.Allsteelpartshavinganultimatetensilestremzthof220,000psi,orabove,shallnotbecoatedwithoutapprovaloftheprocuringactivity.3.2Precoatingprocedures3.2.1Generalrequirements3.2.1.1Unlessotherwisespecified,thecoatingshallbeappliedafterallbasismetalheattreatmentsandmechanicaloperationssuchasmachining,brazing,welding,formingandperforatingoftheparthavebeencompleted.3.2.1.2Parts,priortoplating,shallbedegreased,abrasiveand/oralkalinecleaned,andacidpickledasrequiredtoobtainmaximumcoatingadhesion.Priortocoating,steel.partsshallbemeasuredfor3.2.1.3Hardnessmeasurement.hardnessinaccordancewithASTME18.3.2.2Stressreliefheattreatment.Priortocleaningandcoating,allsteelpartshavingahardnessofRockwellC40orabove,whichhavebeenmachined,groundorsurfacehardened(includescoldworkedbutnotshotpeenedsurfaces),shallbegivenastress-reliefheattreatmentatatemperaturethatwillproducemaximumstressreliefwithoutreducingthehardnesstolessthanthespecifiedminimum.3.2.3Shotpeening.Priortocoating,allsteelpartshavingahardnessofRockwellC40oraboveusedinfatigueapplicationsand/orsubjecttostresscorrosionshallbeshotpeenedinaccordancewithMIL-S-l3165.Unlessotherwisespecified,theshotpeeningshallbeaccomplishedonallsurfacesforwhichthecoatingisrequiredandallimmediatelyadjacentsurfaceswhentheycontainnotches,filletsorotherabruptchangesofsectionsizewherestresseswillbeconcentrated.3.3Coatingproperties3.3.1Generalrequirements3.3.1.1Manufacturersaregivenlatitudeintheselectionofspecificplatingbathformulationsusedforthechemicaldepositionofanamorphousnickel-phosphorousmetalliccompoundprovidedthecoatingobtainedmeetstherequirementsofthisspecification.3.3.1.2Equipment,solutions,andprocessproceduresapprovaloftheprocuringactivity.shallbesubjecttothe3.3.2Thickness.Unlessotherwisespecified,minimumthicknessofthenickelcoatingshallbe0.0010inch(0.026mm)(gradeA)foraluminumbasedalloys,0.0005inch(0.013mm)(gradeB)forcopper,nickel,cobalt,titaniumandberylliumalloys,and0.0015inch(0.039mm)(gradeC)foriron-basedalloys.4Source: http://www.assistdocs.com -- Downloaded: 2006-08-13T15:05ZCheck the source to verify that this is the current version before use.
MIL-C-26074E3.3.3Adhesiononmetals.Thecoatingadhesionaftercompletionofallprocessingandthermaltreatmentsshallbesuchthatwhenexaminedatamagnificationof4X,thecoatingshallnotshowseparationfromthebasismetalwhentestedinaccordancewithASTMB571asspecifiedin4:5.2.Italsoshallbeimpossibletodetachanyareaofthecoatingwithasharpinstrumentontheoutsideradiusofthebent-testspecimen.Formationofcracksthatdonotresultinlossofplatingadhesionisacceptable.3.3.4Corrosionresistance.GradeAcoatingsonaluminumalloysandgradeCcoatingsonironalloysafterplatingandallrequiredthermaltreatmentsshallshownovisualevidenceofcorrosionofthebasismetalwhentestedinaccordancewith4.5.5.3.4Postcoatingprocedures3.4.1Hydrogenembrittiementreliefbake.Within4hoursaftercoating,coatedclass1andclass2steelpartsthathaveahardnessofRockwellC40oraboveshallrequireahydrogenembrittlementreliefbakeat375‘F+25‘Ffornotlessthan3hours.Parts,includingcarburizedparts,thatwilldecre~seinhardnessbyheatingto375‘F+25‘Fshallbeheatedto275“F+15‘Ffornotlessthan5hours.Whentestedinaccordancewith4,5.4,thebakedpartsshallnotcrackorfracture.3.4.2Heattreatments3.4.2.1Class2hardnesscoatings.Class2coatingsshallhaveaminimumhard-nessof800knooporequivalentvickerswhentestedinaccordancewith4.5.3.Class2coatingsonsteelpartsthathaveahardnessofRockwellC40orabovearerequiredtobetestedinaccordancewith4.5.4withoutcrackingorfracture.Thehardnesscanbeachievedbyheatingthepart(see4.5.4and6.3)within4hoursaftercoating.aluminumpartsshallbe3.4.2.2Class3coatings.Coatednonheat-treatableheatedfor1to1.5hoursat375“F+15‘Ftoimproveadhesionofnickeldeposit.3.4.2.3Class4coatings.Coatedheat-treatablealuminumalloysshallbeheatedbetween240“Fto260”Ffor1to1.5hourstoimproveadhesionofnickeldeposit.(NOTE:Thesealloytypesandgradesmayundergomicrostructuralheatedto375”F.)changeswhen3.5Identificationmarking.Whenspecified,thecoatedpartsshallbemarkedwithafluidnotaffectedbywater,orruboff,orsmearduringshipmentorstorage;andshallcarryataggivingthefollowinginformation:a.Basismaterialb.Numberofthisspecification.c.Classandgradeofcoating.Source: http://www.assistdocs.com -- Downloaded: 2006-08-13T15:05ZCheck the source to verify that this is the current version before use.
MIL-C-26074E3.6Workmanshi~3.6.1Basismaterial.Thebasismaterialshallbefreefromdefectsthatwillbedetrimentaltotheutility,appearance,orserviceabilityofthefinishedproductorpartandcoating.3.6.2Nickelcoating.Thenickelcoatingshallbesmooth,adherent,andfreefromvisibleblisters,pits,nodules,porosity,cracksandotherdefects.Alldetailsofwork-manshipshallconformtothebestpracticesforhighqualitycoating.4.QUALITYASSURANCEPROVKIONS4.1Responsibilityforinspection.Unlessotherwisespecifiedinthecontractorpurchaseorder,thecontractorisresponsiblefortheperformanceofallinspectionrequirements(examinationsandtests)asspecifiedherein.Exceptasotherwisespecifiedinthecontractorpurchaseorder,thecontractormayusehisownoranyotherfacilitiessuitablefortheperformanceoftheinspectionrequirementsspecifiedherein,unlessdisapprovedbytheGovernment.TheGovernmentreservestherighttoperformanyoftheinspectionssetforthinthisspecificationwheresuchinspectionsaredeemednecessarytoensuresuppliesandservicesconformtoprescribedrequirements.4.1.1Responsibilityforcompliance.Allitemsshallmeetallrequirementsofsections3and5.Theinspectionsetforthinthisspecificationshallbecomeapartofthecontractor’soverallinspectionsystemorqualityprogram.TheabsenceofanyinspectionrequirementsinthespecificationshallnotrelievethecontractoroftheresponsibilityforensuringthatallproductsorsuppliessubmittedtotheGovernmentforacceptancecomplywithallrequirementsofthecontract.Samplinginspection,aspartofmanufacturingoperations,isanacceptablepracticetoascertainconformancetorequirements,however,thisdoesnotauthorizesubmissionofknowndefectivematerial,eitherindicatedoractual,nordoesitcommitthegovernmenttoacceptdefectivematerial.4.2Classificationofinspection.Theinspectionrequirementsclassifiedasqualityconformanceinspection(see4.4).specifiedhereinare4.3‘Inspectionconditions.Unlessotherwisespecified,allinspectionsshallbeperformedinaccordancewiththemethodsofinspectionspecifiedin4.5.4.3.1Inspectionlot.Alotshallconsistofcoatedpartsofthesametypeandclass,samebasismaterial,andofapproximatelythesamesizeandshape,coatedun-derthesameconditionsandbymeansofthesamecoatingprocess,andsubmittedforacceptanceatonetime.4.3.2Separatespecimens.Whenthecoatedpartsareofsuchformastobenotreadilyadaptabletoatestspecifiedherein,oratthediscretionoftheinspectorfor6Source: http://www.assistdocs.com -- Downloaded: 2006-08-13T15:05ZCheck the source to verify that this is the current version before use.
MIL-C-26074Edestructivetestsforthesamplingofsmalllotsizes,thetestmaybemadebytheuseofseparatespecimenscoatedconcurrentlywiththepartsrepresented.Theseparatespecimensshallbeofabasismaterialequivalent(see6.6)tothatofthepartsrepresented.Forexample,acold-rolledsteelsurfaceshallnotbeusedtorepresentahot-rolledsteelsurface;owingtotheimpracticabilityofforgingorcastingseparatetestspecimens,hot-rolledsteelspecimensmaybeusedtorepresentforgedandcaststeelparts.Theseparatespecimensshallbestripsapproximatelyl-inchwide,4-incheslong,and0.04-inchthickexceptthoserequiredfordeterminationofembrittlementrelief(see4.5.4).Thesespecimensshallbeintroducedintoalotatregularintervalspriortothecleaningoperationspreliminarytocoatingandshallnotbeseparatedtherefromuntilaftercompletionoftheprocessing.4.4Qualityconformanceinspection.ofsamplingplansA,B,C,D,andE.Qualityconformanceinspectionsshallconsist4.4.1SamplingplanA-Samplingproceduresforvisualexaminationandnondestructivetestsofcoatingthickness.Samplesshallbeselectedfromeachlot(see4.3.1)andacceptanceofthelotshallbedeterminedinaccordancewithinspectionlevel11andacceptablequalitylevel(AQL)1.5ofMIL-STD-105.Periodicmicroscopicdestructivethicknessandadhesiontestsshallbeperformedasarefereemethodtoverifycomparablenondestructivetestsforthepurposeofprocesscontrolassurance.4.4.1.1Visualinspection.Eachofthesamplepartsselectedinaccordance4.4.1shallreexaminedvisuallyforconformancetorequirementsof3.6.2.4.4.1.2Thicknessaccordancewith4.4.1locationsoneachpartnonconformingifonethickness.with(nondestructivetests).Eachofthesamplepartsselectedinshallbeinspected,andthecoatingthicknessmeasuredinseveralinaccordancewith4.5.1.2.Thepartshallbeconsideredormoremeasurementsfailtomeetthespecifiedminimum4.4.2SamplingplanB-Samplingproceduresforevaluatinghydrogenembrittle-Ahydrogenembrittlementrelieftestsha]lmentreliefdestructivetest-Class1and2,berunoncepermonthonarandomsampleof4partsasspecifiedin4.5.4.4.4.3SamplingplanC-Samplingprocedureforadhesiontests.Arandomsampleof4partsshallbeselectedfromeachinspectionlotwhichhasmorethan15parts(see4.3.1),or4separatelycoatedspecimensshallbepreparedinaccordancewith4.3.2torepresenteachinspectionlot.Ifthenumberofpartsinaninspectionlotis15orless,thenumberofpartsinthesampleshallbe2or3asdeterminedbytheprocuringactivity.4.4.3.1Adhesion.Eachpart,orspecimenshallbetestedasspecifiedin4.5.2.Failureofoneormoreofthetestspecimensshallconstitutefailureofthelot.7Source: http://www.assistdocs.com -- Downloaded: 2006-08-13T15:05ZCheck the source to verify that this is the current version before use.
MIL-C-26074E4.4.4SamplingplanD-Samplingprocedureforwardnesstest.-Class2.Ahardnesstestshallberunonceamonth,onfourrandomlyselectedpartsrepresentingthemonthsproduction,oronfourseparatelycoatedspecimensasspecifiedin4.5.3.Theamountoftestingmaybereducedprovidedtheresultsintheconsecutivemonthsindicateauniformproductmeetingthetestrequirementsisbeingproduced,andprovidingthemanufactureragreestomaintainthesamemanufacturingproceduresordevelopsalternativeacceptablemanufacturingprocedures.4.4.5SamplingPlanE.Samplingprocedurefordestructivetestsofcoatingthickness.Atleastoncepercalendarquarter,acoatedpart,oraseparatelycoatedspecimenpreparedinaccordancewith4.3.2,shallbetestedinaccordancewith4.5.1.1toverifytheadequacyofthenondestructivemthodsofthicknesstesting.4.5Methodsofinspection4.5.1ThicknesstestThecoatingthicknessshallredeterminedinaccor-4.5.1.1Microscopicmethod.dancewithASTMB487.4.5.1.2Nondestructiveinstrumentalmethods.Theinstrumentused,itscalibration,anditsoperationfortestinggivenpartsshallbesuchthatthecoatingthicknessshallbedeterminedwith+10percentofitstruethickness,ortheinstrumentshallbeofatypeapprovedbyth~procuringactivity(see6.4).ThecoatingthicknessshallbedeterminedinaccordancewithASTMB499,ASTMB568,andASTMB567.Periodicverificationoftheinstrumentalmethodsmustbemadeinaccordancewith4.5.1.1.4.5.2Adhesiontest,Thetestspecimenshallbebent180°overamandreldiameter4timesthethickness(0.4inchminimum)ofthespecimen.4.5,3Hardnesstests.Vickers-hardnessmeasurementsshallbeinaccordancewithASTME384.Knoop-hardnessmeasurementsshallbeinaccordancewithASTMB578..,4.5.4Embrittlementrelief.Compliancewith3.4.1and3.4.2.1shallbedeterminedwithsamplesofplatedparts.Parts--springpins,lockrings,andsoforth--thatareinstalledinholesorrodsshallbesimilarlyassembledusingtheapplicablepartsspecificationsordrawingtoleranceswhichimposethemaximumsustainedtensileloadontheplatedpart.Theselectedsamplesshallbesubjectedtoasustainedtensileloadequalto115percentofthemaximumdesignyieldloadforwhichthepartwasdesigned,Partsthatrequirespecialfixtures,extremeloadstocomplywiththeaboverequirements,orwherethemaximumdesignyieldloadisnotknown,mayberepresentedbyseparatetestspecimens.TheseparatespecimensshallbeofatypespecifiedinASTMF519andtestedasrequiredtherein.Thearticles,partsortest8Source: http://www.assistdocs.com -- Downloaded: 2006-08-13T15:05ZCheck the source to verify that this is the current version before use.
MIL-C-26074Especimensshallbeheldunderloadforaleast200hoursandthenexaminedforfracture.Thelotshallberejectedifanycoatedarticle,part,ortestspecimenshowscrackingorfractureofthebasismetal.4.5.5Corrosiontest.Coated-testspecimensshallbeexposedtoaneutralsalt-spraytestinaccordancewithASTMB117for100hours.Theseparatetestspecimensusedforsalt-spraytestingshallbe4inchesby6inches.5.PACKAGING5.1Coatedsurfacesshallbeprotectedfromdamageduringshipmentandstorage.6.NOTES(Thissectioncontainsinformationofageneralorexplanatoryhelpful,butisnotmandatory.)naturethatmaybe6.1Intendeduses.Thecoatingisintendedforusewhenhardandsmoothsurfacesarerequiredoncoatedparts.Excellentuniformdepositsareproducedonirregularparts.Coatedparts--thatis,thosepartsusedinaircompressors,missile-fuelinjectorplates,pumps,reciprocatingsurfaces,andsoforthareprotectedfromoxidation,corrosionandwear.Withaluminumelectronicdevices,notonlyisproductcontaminationprevented,butthecoatedpartsfacilitatesolderingwhenusedinconjunctionwithamildlyactivated(RMA)oractivated(RA)rosinflux.Coatedpartsofstainlesssteelsimilarlyfacilitatebrazing.6.2Acquisitionrequirements.Acquisitiondocumentsshouldspecifythefollowing:a.Title,numberanddateofthespecification.b.Classandgrade,andheattreatmentorcondition(see1.2and3.5).c.IssueofDODISStobecitedinthesolicitation,andifrequired,thespecificissueofindividualdocumentsreference(see2.1.1and2.2).6.3Heatingscheduleforclass2coating.6.3.1Requiredhardnesscanbeachievedbyheatingusingthefollowingschedule:Hours4ormore‘FTemperature50055065075092ormore1to1.50.5to1Source: http://www.assistdocs.com -- Downloaded: 2006-08-13T15:05ZCheck the source to verify that this is the current version before use.
MIL-C-26074E6.4Nondestructivethicknessmeasurements,Thicknessmeasurementsofelectrolessnickelcoatingscontainingmorethan8percentphosphorousaresufficientlynonmagnetictobemeasuredforthicknessinaccordancewithASTMB499,“MethodofMeasurementofCoatingThickness”bytheMagneticMethod:NonmagneticCoatingsonMagneticBasisMetals,“ifdepositedonamagneticbasismetal.Whenmeasuringheat-treatedcoatingscontainingmorethan8percentphosphorous,theinstrumentshouldbecalibratedagainstheat-treatedstandardsofknowncoatingsthicknessorequivalentcalibrationfoils.Heattreatmentincreasescoatingmagnetism.Measurementofelectrolessnickelcoatingscontaininglessthan8percentphosphorousbyamagneticmethodisnotrecommended.6.5Subjectterm(keyword)listingNickelElectroless(autocatalyticchemicalreduction)6.6Equivalentmaterial.Equivalentbasismaterialincludeschemicalcompositionandsurfacefinishpriortocoatingapplication.6.7Recycledmaterial.Itisencouragedthatrecycledmaterialbeusedwhenpracticalaslongasitmeetstherequirementsofthedocument(see3.1).6.8Changesfrompreviousissue.Asterisksarenotusedinthisrevisiontoidentifychangeswithrespecttothepreviousissueduetotheextensivenessofthechanges.Custodians:AirForce-11Army-MRNavy-ASReviewers:AirForce-68,84,99Navy-SHArmy-MI,ARUsers:Navy-OSArmy-MEPreparingactivity:AirForce-11ProjectNo.MFFP-045710Source: http://www.assistdocs.com -- Downloaded: 2006-08-13T15:05ZCheck the source to verify that this is the current version before use.
STANDARDIZATION1,ThepreparingDOCUMENTIMPROVEMENTPROPOSALINSTRUCTIONSactivitymustcompleteblocks1,2,3,and8.Inblock1,boththedocumentnumberandrevisionlettershouldbegiven.2.3.Thesubmitterofthisformmustcompleteblocks4,5,6,and7.Thepreparingactivitymustprovideareplywithin~0daysfromreceiptoftheform.NOTE:Thisformmaynotbeusedtorequestcopiesof,documents,nortorequestwaivers,ordarififxtionofrequirementsoncurrentcontracts.Commentssubmittedonthisformdonotcorlstituteorimplyauthorizationtowaiveanyportionofthereferenceddocument(s)ortoamendcontractualrequirements.IRECOMMENDCOATINGS,4.NATUREACHANGE:~,~-:.;g:y&NuMBERFORrewnle,ifpossible9010302.DOCUMENIDATE(YYMMDD)ELECTROLESSNICKELREQUIREMENTSOFCHANG@rtentifyparagraphnumberandincludeproposedAttachextrasheetsasneeded.)5.REASONFORRECOMMENDATION6.SUBMITTERa.NAME(Last,First,MiddlelnitiafJb.ORGANIZATIONc.ADORESS(includeZipCode)d,TELEPHONE(1)Commercial(2)AUTOVON(ifapplicable)(IncludeAreaCode)I7.DATESUBMITTED(YYMMDD)6.PREPARINGa.NAMEACTIVITYb.TELEPHONEincludeAreaCode)(1)Commercial(513)255-6295(2)AUTOVON785-6295ASD/ENESASD/ENES(ENGINEERINGDOCUMENTS)WRIGHT-PATTERSONAFB,OH45433-6503,)DForm1426,OCT69Previouseditionsareobsolete.19W290Source: http://www.assistdocs.com -- Downloaded: 2006-08-13T15:05Z
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