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1、Designation:A320A320M?18StardSpecificationfAlloySteelStainlessSteelBoltingfLowTemperatureService1ThisstardisissuedunderthefixeddesignationA320A320Mthenumberimmediatelyfollowingthedesignationindicatestheyearofiginaladopti
2、oninthecaseofrevisiontheyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperepsilon()indicatesaneditialchangesincethelastrevisionreapproval.ThisstardhasbeenapprovedfusebyagenciesoftheU.S.Departm
3、entofDefense.1.Scope1.1Thisspecification2coversalloysteelboltingmaterialsboltingcomponentsfpressurevesselsvalvesflangesfittingsflowtemperatureservice.SeeSpecificationA962A962Mfthedefinitionofbolting.Thebarsshallbehotwrou
4、ghtmaybefurtherprocessedbycenterlessgrindingbycolddrawing.Austeniticstainlesssteelmaybesolutionannealedannealedstrainhardened.Whenstrainhardenedausteniticstainlesssteelisderedthepurchasershouldtakespecialcaretoensurethat
5、AppendixX1isthoughlyunderstood.1.2SeveralgradesarecoveredincludingbothferriticausteniticsteelsdesignatedL7B8etc.ionwilldependondesignserviceconditionsmechanicalpropertieslowtemperatureacteristics.Themechanicalrequirement
6、sofTable1indicatethediametersfwhichtheminimummechanicalpropertiesapplytothevariousgradesclassesTable2stipulatestherequirementsfpyimpactenergyabsption.Themanufacturershoulddeterminethatthematerialcanconfmtotheserequiremen
7、tsbefepartsaremanufactured.FexamplewhenGradeL43isspecifiedtomeettheTable2impactenergyvaluesat?150F[?101C]additionalrestrictions(suchasprocuringasteelwithlowerPScontentsthanmightnmallybesupplied)inthechemicalcompositionfA
8、ISI4340arelikelytoberequired.NOTE1—Thecommitteefmulatingthisspecificationhasincludedseveralgradesofmaterialthathavebeenratherextensivelyusedfthepresentpurpose.Othercompositionswillbeconsideredfinclusionbythecommitteefrom
9、timetotimeastheneedbecomesapparent.Usersshouldnotethathardenabilityofsomeofthegradesmentionedmayrestrictthemaximumsizeatwhichtherequiredmechanicalpropertiesareobtainable.1.3Thefollowingreferencedgeneralrequirementsareind
10、ispensablefapplicationofthisspecification:SpecificationA962A962M.1.4NutsfusewithboltingarecoveredinSection10thenutmaterialshallbeimpacttested.1.5SupplementaryRequirementsareprovidedfuseattheoptionofthepurchaser.Thesupple
11、mentaryrequirementsshallapplyonlywhenspecifiedinthepurchasedercontract.1.6ThisspecificationisexpressedinbothinchpoundunitsSIunitshoweverunlessthepurchasedercontractspecifiestheapplicableMspecificationdesignation(SI)units
12、theinchpoundunitsshallapply.1.7ThevaluesstatedineitherSIunitsinchpoundunitsaretoberegardedseparatelyasstard.Thevaluesstatedineachsystemmaynotbeexactequivalentstherefeeachsystemshallbeusedindependentlyoftheother.Combining
13、valuesfromthetwosystemsmayresultinnonconfmancewiththestard.1.8ThisinternationalstardwasdevelopedinaccdancewithinternationallyrecognizedprinciplesonstardizationestablishedintheDecisiononPrinciplesftheDevelopmentofInternat
14、ionalStardsGuidesRecommendationsissuedbytheWldTradeganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStards:3A194A194MSpecificationfCarbonSteelAlloySteelStainlessSteelNutsfBoltsfHighPressureHig
15、hTemperatureServiceBothA962A962MSpecificationfCommonRequirementsfBoltingIntendedfUseatAnyTemperaturefromCryogenictotheCreepRangeE566PracticefElectromagic(EddyCurrent)StingofFerrousMetals1Thisspecificationisunderthejurisd
16、ictionofASTMCommitteeA01onSteelStainlessSteelRelatedAlloysisthedirectresponsibilityofSubcommitteeA01.22onSteelFgingsWroughtFittingsfPipingApplicationsBoltingMaterialsfPipingSpecialPurposeApplications.Currenteditionapprov
17、edJune12018.PublishedJune2018.iginallyapprovedin1948.Lastpreviouseditionapprovedin2017asA320A320M–17b.DOI:10.1520A0320_A0320M18.2FASMEBoilerPressureVesselCodeapplicationsseerelatedSpecificationSA320inSectionIIofthatCode.
18、3FreferencedASTMstardsvisittheASTMwebsitewww.astm.gcontactASTMCustomerServiceat.FAnnualBookofASTMStardsvolumeinfmationrefertothestard’sDocumentSummarypageontheASTMwebsite.ASummaryofChangessectionappearsattheendofthisstar
19、dCopyright?ASTMInternational100BarrHarbDrivePOBoxC700WestConshohockenPA194282959.UnitedStatesThisinternationalstardwasdevelopedinaccdancewithinternationallyrecognizedprinciplesonstardizationestablishedintheDecisiononPrin
20、ciplesftheDevelopmentofInternationalStardsGuidesRecommendationsissuedbytheWldTradeganizationTechnicalBarrierstoTrade(TBT)Committee.1F436F436MSpecificationfHardenedSteelWashersInchMetricDimensionsF606F606MTestMethodsfDete
21、rminingtheMechanicalPropertiesofExternallyInternallyThreadedFastenersWashersDirectTensionIndicatsRivets2.2ASMEStards:4B1.1ScrewThreadsB18.22.1PlainWashers3.deringInfmation3.1Itisthepurchaser’sresponsibilitytospecifyinthe
22、purchasederallinfmationnecessarytopurchasetheneededmaterials.Examplesofsuchinfmationincludebutarenotlimitedtothefollowing:3.1.1Quantitysize3.1.2Heattreatedconditionthatisftheausteniticstainlesssteelssolutiontreated(Class
23、1)solutiontreatedafterfinishing(Class1A)annealedstrainhardened(Class2)3.1.3Deionofitemsrequired(barsboltsscrewsstuds)3.1.4NutswashersifrequiredbythepurchaserinaccdancewithSection103.1.5Specialrequirementsinaccdancewith5.
24、1.15.1.35.1.413.1.4.CommonRequirements4.1BoltingmaterialsboltingcomponentssuppliedtothisspecificationshallconfmtotherequirementsofSpecificationA962A962M.Theserequirementsincludetestmethodsfinishthreaddimensionsmacroetch(
25、carbonalloysteelsonly)markingcertificationoptionalsupplementaryrequirementsothers.FailuretocomplywiththerequirementsofSpecificationA962A962Mconstitutesnonconfmancewiththisspecification.Incaseofconflictbetweentherequireme
26、ntsinthisspecificationSpecificationA962A962Mthisspecificationshallprevail.5.MaterialsManufacture5.1HeatTreatment:5.1.1Boltingmaterialsshallbeallowedtocooltoroomtemperatureafterrollingfging.GradesL7L7AL7BL7CL7ML43L1L70L71
27、L72L73shallbereheatedtoabovetheuppercriticaltemperatureliquidquenchedtempered.GradesB8B8CB8MB8TB8FB8PB8LNB8MLNshallreceiveacarbidesolutiontreatment.ProductsmadefromsuchmaterialaredescribedasClass1.Thisshallconsistofholdi
28、ngtheboltingmaterialfasufficienttimeatatemperatureatwhichthechromiumcarbidewillgointosolutionthencoolinginairinaliquidmediumataratesufficienttopreventreprecipitationofthecarbide.BoltingmaterialthustreatedisdescribedasCla
29、ss1.IfspecifiedinthepurchasederboltingmaterialshallbesolutiontreatedinthefinishedconditionshallbedescribedasClass1A.5.1.2Useofwaterquenchingisprohibitedfanyferriticgradewhenheattreatmentisperfmedafterheadingthreading.5.1
30、.3WhenincreasedmechanicalpropertiesaredesiredausteniticboltingshallbesolutionannealedstrainhardenedifspecifiedinthepurchasedermaterialsotreatedisidentifiedasClass2.5.1.4Ifscalefreebrightfinishisrequiredthisshallbespecifi
31、edinthepurchaseder.5.1.5FL7Mboltingthefinalheattreatmentwhichmaybethetemperingstressrelievingoperationconductedat1150F[620C]minimumshallbedoneaftermachiningrollingofthethreadsanytypeofcutting.6.MechanicalRequirements6.1T
32、ensileProperties:6.1.1BoltingmaterialasrepresentedbythetensionspecimensshallconfmtotherequirementsastotensilepropertiesprescribedinTable1atroomtemperatureafterheattreatment(see5.1.1).AlternativelyClass2StrainHardenedHead
33、edBoltingComponentsshallbetestedfullsizeafterstrainhardeningtodeterminetensilestrengthyieldstrengthshallconfmtotherequirementsprescribedinTable1.Shouldtheresultsoffullsizetestsconflictwithresultsoftensionspecimentestsful
34、lsizetestresultsshallprevail.6.1.2NumberofTests:6.1.2.1Fheattreatedbarsonetensiontestoneimpacttestconsistingofthreespecimensshallbemadefeachdiameterofeachheatrepresentedineachtemperingge.Whenheattreatedwithoutinterruptio
35、nincontinuousfurnacesthematerialinalotshallbethesameheatsamepriconditionsamesizesubjectedtothesameheattreatment.Notfewerthantwotensileteststwoimpacttestsarerequiredfeachlotcontaining20000lbs[9000kg]less.Everyadditional10
36、000lbs[4500kg]fractionthereofrequiresanadditionaltensiletestimpacttest.4AvailablefromAmericanSocietyofMechanicalEngineers(ASME)ASMEInternationalHeadquartersTwoParkAve.NewYkNY100165990:www.asme.g.TABLE2ImpactTestTemperatu
37、resPropertiesGradeTestTemperatureCVNSpecimenSectionSizemmMinAverageImpactToughnessofThreeTestSpecimensftlbf[J]MinImpactValueofaSingleSpecimenofSetofThreeftlbf[J]FC101020[27]15[20]L7ML70L71L72L73–100–73107.516[22]12[16]10
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