StandardSpecificationfor
Precipitation-HardeningFastenersandFastenerMaterial(UNSN07718)forHighTemperatureService1ThisstandardisissuedunderthefixeddesignationA1014/A1014M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.
1.Scope*
1.1Thisspecificationcoversprecipitationhardeningfasten-ersandfastenermaterial(UNSN07718)forhightemperatureservice.
1.2Thefollowingreferencedgeneralrequirementsarein-dispensableforapplicationofthisspecification:SpecificationA962/A962M.
1.3Supplementaryrequirementsareprovidedforuseattheoptionofthepurchaser.Thesupplementaryrequirementsonlyapplywhenspecifiedindividuallyinthepurchaseorderorcontract.
1.4Thisspecificationisexpressedinbothinch-poundandinSIunits.However,unlessthepurchaseorderorcontractspecifiestheapplicableMdesignation(SIunits),theinch-poundunitsshallapply.
1.5ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Withinthetext,theSIunitsareshowninbrackets.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.
2.ReferencedDocuments2.1ASTMStandards:2A370TestMethodsandDefinitionsforMechanicalTestingofSteelProducts
A962/A962MSpecificationforCommonRequirementsforSteelFastenersorFastenerMaterials,orBoth,IntendedforUseatAnyTemperaturefromCryogenictotheCreepRange
B637SpecificationforPrecipitation-HardeningNickelAl-loyBars,Forgings,andForgingStockforHigh-
TemperatureService
B880SpecificationforGeneralRequirementsforChemicalCheckAnalysisLimitsforNickel,NickelAlloysandCobaltAlloys
E112TestMethodsforDeterminingAverageGrainSizeE292TestMethodsforConductingTime-for-RuptureNotchTensionTestsofMaterials2.2ANSIStandards:B1.1ScrewThreads32.3SAEStandards:
AS7467BoltsAndScrews,NickelAlloy,UNSN07718TensileStrength185KSI[1275MPa]StressRuptureRatedProcurementSpecification43.OrderingInformation
3.1Ordering—ItshallbetheresponsibilityofthepurchasertospecifyallrequirementsthatarenecessaryforproductunderthisspecificationincludinganysupplementaryonesandthoseincludedintheorderinginformationrequiredbySpecificationA962/A962M.
4.CommonRequirements
4.1CommonRequirements—ProductfurnishedtothisspecificationshallconformtoSpecificationA962/A962M,includinganysupplementaryrequirementsindicatedonthepurchaseorder.FailuretocomplywithSpecificationA962/A962Mconstitutesnon-conformancewiththisspecification.IftherequirementsofthisspecificationconflictwiththoseofSpecificationA962/A962M,thentherequirementsofthisspecificationshallprevail.
5.Manufacture
5.1MeltingProcess—Alloyshallbemultiplemeltedusingconsumableelectrodepracticeintheremeltcycleorshallbeinductionmeltedundervacuum.Ifconsumableelectroderemeltingisnotperformedinvacuum,electrodesproducedbyvacuuminductionmeltingshallbeused.5.2HeatTreatment:
ThisspecificationisunderthejurisdictionofASTMCommitteeA01onSteel,StainlessSteelandRelatedAlloysandisthedirectresponsibilityofSubcommitteeA01.22onSteelForgingsandWroughtFittingsforPipingApplicationsandBoltingMaterialsforPipingandSpecialPurposeApplications.
CurrenteditionapprovedMay1,2009.PublishedMay2009.Originallyapprovedin2000.Lastpreviouseditionapprovedin2006asA1014–06.2ForreferencedASTMstandards,visittheASTMwebsite,www.astm.org,orcontactASTMCustomerServiceatservice@astm.org.ForAnnualBookofASTMStandardsvolumeinformation,refertothestandard’sDocumentSummarypageontheASTMwebsite.
1AvailablefromAmericanNationalStandardsInstitute(ANSI),25W.43rdSt.,4thFloor,NewYork,NY10036,http://www.ansi.org.4AvailablefromSocietyofAutomotiveEngineers(SAE),400CommonwealthDr.,Warrendale,PA15096-0001,http://www.sae.org.
3*ASummaryofChangessectionappearsattheendofthisstandard.
Copyright©ASTMInternational,100BarrHarborDrive,POBoxC700,WestConshohocken,PA19428-2959,UnitedStates.
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A1014/A1014M–09
5.2.1SolutionTreatment—Materialshallbesolutionheattreatedatatemperaturewithintherangeof1725to1850°F[940to1010°C],heldattheselectedtemperatureforatimecommensuratewithcross-sectionalthickness,andcooledatarateequivalenttoanaircoolorfaster.
5.2.1.1TemperatureVariation—Solutiontreatingtempera-turesshallbecontrolledintherangeof625°F[614°C].5.2.2PrecipitationHeatTreatment—Materialshallbeheatedtoatemperatureof1325°F[720°C],heldattempera-tureforeighthoursminimum,furnacecooledto1150°F[620°C]at100°F[55°C]perhour,heldattemperatureforeighthours,andcooledtoroomtemperature.Alternatively,materialmaybefurnacecooledto1150°F[620°C]atanyrateprovidedthetimeat1150°F[620°C]isadjustedsothetotalprecipi-tationheattreatmenttimeis18hoursminimum.
5.2.2.1TemperatureVariation—Precipitationtreatmenttemperaturesandcoolingratesshallbecontrolledintherangeof615°F[68°C].
5.3Straightening—Whenstraighteningisnecessaryitshallbedoneaftersolutiontreatingandpriortoaging.Straighteningafteragingisprohibited.
5.4Threads—Threadsshallbeformedbyrollinginonepassafteroxideshavebeenremovedfromtheareatobethreaded.
5.5DimensionsandTolerances,FastenerMaterial—FullyheattreatedfastenermaterialshallmeetthedimensionalrequirementsofSpecificationB637forUNSN07718.6.ChemicalComposition
6.1RemeltIngots—Thechemicalanalysesofeachremeltedingotshallconformtotherequirementsforchemicalcompo-sitionprescribedinTable1.
6.2ProductAnalysis—Ifaproduct(check)analysisisperformedbythepurchaser,thematerialshallconformtotheproduct(check)analysisvariationsprescribedinSpecificationB880.
7.MechanicalProperties
7.1TensileandHardness—Alltestingshallbeperformedafteraging.ThetestspecimensshallmeettherequirementsofTable2.
7.2StressRupture—Stressrupturetestingshallbecon-ductedinaccordancewithTable2usingacombinationtestbarinaccordancewithTestMethodsE292.Rupturemustoccurinthesmoothsectionofeachtestspecimen.
7.3HeadedFasteners—Inadditionto7.1and7.2,headedfastenerswithbodylengththreetimesthediameterorlongershallbesubjectedtofullsizetensiletestinaccordancewithAnnexA3ofTestMethodsandDefinitionsA370andshallconformtothetensilestrengthshowninTable2.Theminimumfullsizebreakingstrength(lbf)[Kn]forindividualsizesshallbeasfollows:
Ts5UTS3As
(1)
As
=stressarea,squareinches[squaremilimetres],asshowninANSIB1.1orcalculatedasfollows:
As50.785~D–~0.974/n!!2
(2)
where:
D=nominalthreadsize,and
n=thenumberofthreadsperinch.
@As50.785~D–0.9382P!2#
(3)
[where:
D=Nominalthreadsize,andP=Threadpitch,mm.]
TABLE1ChemicalRequirements
Element
Carbon,max.Manganese,max.Silicon,max.
Phosphorus,max.Sulfur,max.ChromiumCobalt,max.AMolybdenumColumbium+TantalumTitaniumAluminumBoron,max.IronBCopper,max.NickelCABUNSN07718
(FormerlyGrade718)0.080.350.350.0150.01517.0–21.01.0
2.80–3.304.75–5.50...
0.65–1.150.20–0.800.006
Remainder0.30
50.0–55.0
Ifdetermined.
Determinedarithmeticallybydifference.CNickel+Cobalt.
TABLE2MechanicalProperties
TensileandHardness
Tensilestrength,min,ksi[Mpa]
YieldStrength,min,ksi,[Mpa]0.2%offsetElongationin2in.,or50mm(or4D)min%Reductionofarea,min,%Hardness,Brinell
StressRuptureRequirements
Temperature,°F[°C]Stress,ksi[Mpa]Hours,min
Elongationin2in.,or50mm(or4D),min%ElevatedTensileRequirements
Temperature,°F[°C]
Tensilestrength,min,ksi[Mpa]
YieldStrength,min,ksi,[Mpa]0.2%offsetElongationin2in.,or50mm(or4D)min%Reductionofarea,min,%
1200[650]145[1000]125[860]12151200[650]100[690]235
185[1275]150[1035]1215
331–444
where:Ts=tensilestrength,
UTS=tensilestrengthspecifiedinTable2,and
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8.Metallography
8.1Microstructure—Themicrostructureshallbefreeoffreckles,whitespots,andLavesphases.Threadsmayshowevidenceofcoldworkingasaresultofrolling.TheaveragegrainsizeshallbedeterminedinaccordancewithTestMethodsE112andfoundtobeASTMNo5orfiner.Upto20%ofthe
A1014/A1014M–09
structuremayhaveagrainsizeaslargeasaNo.3duetothepresenceofnoncrystallizedgrains.
8.2Macrostructure—Fastenersproducedfromforgingsshallexhibitcontinuousflowlinesinthethreadsandinanyshanktoheadorfilletand/orbearingsurfaceareas.9.NumberofTests
9.1Chemistry—Onetestperremeltingot.
9.2MechanicalProperties—ThenumberoftestsshallbeinaccordancewithSpecificationA962/A962Mexceptthatforstressruptureonetestshallberunperlot.Forheadedfastenerswithabodylengthlessthanthreetimesthediameteraseparatelyforgedtestbarmaybeusedfortensileandstressrupturetestingprovideditisheat-treatedwiththeparts.Separatelyforgedbarsshallbeapproximatelythesamediam-eterastheheadedfastenertheyrepresent.9.3GrainSize—Onetestperlot.
9.4FlowLines—Onetestperlotonforgedfastenersafterfinalmachining.
9.5HeadedFasteners—Onetensiletestperlot.
10.Workmanship
10.1FastenerMaterial—Shallbeuniforminqualityandcondition,smooth,commerciallystraightorflat,andfreeofinjuriousimperfections.
10.2Fasteners—Multiplelapsonthreadflanksareprohib-ited.Seams,laps,notches,slivers,oroxidescaleintherootareaofthreadsareprohibited.Cracksareprohibited.11.ProductMarking
11.1Marking—Fastenersshallbemarkedwith“718”andthemanufacturer’sidentificationsymbol.
12.Certification
12.1Report—InadditiontotherequirementsofA962/A962M,certificationshallincludethesolutiontreatmentcycletimeandtemperatureandtheagingcycletime(s)andtempera-ture(s).
13.Keywords
13.1bolts;fasteners;Inconel718;nickelalloy;precipitationhardening;temperatureserviceapplication–high
SUPPLEMENTARYREQUIREMENTS
TheserequirementsdonotapplyunlessspecifiedinthepurchaseorderandintheOrderingInformation,inwhicheventthespecifiedtestsshallbemadebeforeshipmentoftheproduct.
S1.ProtectiveAtmosphere
S1.1Heattreatmentshallbeperformedundersuitableprotectiveatmosphere.
S2.Cleaning
S2.1PartsshallbecleanedwithnitricacidasstatedinAS7467
S3.FilletRolling
S3.1Thefilletareaofthefastenerheadshallberolled.
S4.ForgedHeads
S4.1Headsshallbeforged.S5.Marking
S5.1Fastenermarkingshallincludeheatlotidentification.S5.ThreadRolling
S5.1Threadrollingshallbeperformedbeforeprecipitationheattreatment.
SUMMARYOFCHANGES
CommitteeA01hasidentifiedthelocationofselectedchangestothisspecificationsincethelastissue,A1014/A1014M–06,thatmayimpacttheuseofthisspecification.(ApprovedMay1,2009)
(1)Revisedtitleandreplacedoccurrencesof“bolting”with“fastener.”Droppeddefinitionfor“boltingmaterial”becauseitisinSpecificationA962/A962M.UpdatedScoperelativetosupplementaryrequirements,useofSIunitsasperGuideA994,andaddedreferencetoSpecificationA962/A962Masindispensableforapplicationofthisspecification.
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A1014/A1014M–09
ASTMInternationaltakesnopositionrespectingthevalidityofanypatentrightsassertedinconnectionwithanyitemmentionedinthisstandard.Usersofthisstandardareexpresslyadvisedthatdeterminationofthevalidityofanysuchpatentrights,andtheriskofinfringementofsuchrights,areentirelytheirownresponsibility.
Thisstandardissubjecttorevisionatanytimebytheresponsibletechnicalcommitteeandmustbereviewedeveryfiveyearsandifnotrevised,eitherreapprovedorwithdrawn.YourcommentsareinvitedeitherforrevisionofthisstandardorforadditionalstandardsandshouldbeaddressedtoASTMInternationalHeadquarters.Yourcommentswillreceivecarefulconsiderationatameetingoftheresponsibletechnicalcommittee,whichyoumayattend.IfyoufeelthatyourcommentshavenotreceivedafairhearingyoushouldmakeyourviewsknowntotheASTMCommitteeonStandards,attheaddressshownbelow.
ThisstandardiscopyrightedbyASTMInternational,100BarrHarborDrive,POBoxC700,WestConshohocken,PA19428-2959,UnitedStates.Individualreprints(singleormultiplecopies)ofthisstandardmaybeobtainedbycontactingASTMattheaboveaddressorat610-832-9585(phone),610-832-9555(fax),orservice@astm.org(e-mail);orthroughtheASTMwebsite(www.astm.org).
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