ASTM-A194-A194M--16

Designation:A194/A194M−16EndorsedbyManufacturersStandardizationSocietyoftheValveandFittingsIndustryUsedinUSNRC-RDTStandardsStandardSpecificationforCarbonSteel,AlloySteel,andStainlessSteelNutsforBoltsforHighPressureorHighTemperatureService,orBoth1ThisstandardisissuedunderthefixeddesignationA194/A194M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope*1.1Thisspecification2coversavarietyofcarbon,alloy,andmartensiticstainlesssteelnutsinthesizerange1⁄4through4in.andmetricM6throughM100nominal.Italsocoversausteniticstainlesssteelnutsinthesizerange1⁄4in.andM6nominalandabove.Thesenutsareintendedforhigh-pressureorhigh-temperatureservice,orboth.Gradesubstitutionswithoutthepurchaser’spermissionarenotallowed.1.2Barsfromwhichthenutsaremadeshallbehot-wrought.Thematerialmaybefurtherprocessedbycenterlessgrindingorbycolddrawing.Austeniticstainlesssteelmaybesolutionannealedorannealedandstrain-hardened.Whenannealedandstrainhardenedausteniticstainlesssteelisorderedinaccor-dancewithSupplementaryRequirementS1,thepurchasershouldtakespecialcaretoensurethat8.2.2,SupplementaryRequirementS1,andAppendixX1arethoroughlyunderstood.1.3Supplementaryrequirementsofanoptionalnatureareprovided.Theseshallapplyonlywhenspecifiedintheinquiry,contract,andorder.1.4Thisspecificationisexpressedinbothinch-poundunitsandinSIunits.However,unlesstheorderspecifiestheapplicable“M”specificationdesignation(SIunits),themate-rialshallbefurnishedtoinch-poundunits.1.5Thevaluesstatedineitherinch-poundunitsorSIunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.Withinthetext,theSIunitsareshowninbrackets.2.ReferencedDocuments2.1ASTMStandards:3A153/A153MSpecificationforZincCoating(Hot-Dip)onIronandSteelHardwareA276SpecificationforStainlessSteelBarsandShapesA320/A320MSpecificationforAlloy-SteelandStainlessSteelBoltingforLow-TemperatureServiceA370TestMethodsandDefinitionsforMechanicalTestingofSteelProductsA962/A962MSpecificationforCommonRequirementsforBoltingIntendedforUseatAnyTemperaturefromCryo-genictotheCreepRangeB633SpecificationforElectrodepositedCoatingsofZinconIronandSteelB695SpecificationforCoatingsofZincMechanicallyDe-positedonIronandSteelB696SpecificationforCoatingsofCadmiumMechanicallyDepositedB766SpecificationforElectrodepositedCoatingsofCad-miumE112TestMethodsforDeterminingAverageGrainSizeE566PracticeforElectromagnetic(EddyCurrent)SortingofFerrousMetalsF606TestMethodsforDeterminingtheMechanicalProper-tiesofExternallyandInternallyThreadedFasteners,Washers,andRivets(Metric)F0606_F0606MF1940TestMethodforProcessControlVerificationtoPreventHydrogenEmbrittlementinPlatedorCoatedFastenersF1941SpecificationforElectrodepositedCoatingsonThreadedFasteners(Metric)F1941_F1941MF2329SpecificationforZincCoating,Hot-Dip,Require-mentsforApplicationtoCarbonandAlloySteelBolts,Screws,Washers,Nuts,andSpecialThreadedFasteners1ThisspecificationisunderthejurisdictionofASTMCommitteeA01onSteel,StainlessSteelandRelatedAlloysandisthedirectresponsibilityofSubcommitteeA01.22onSteelForgingsandWroughtFittingsforPipingApplicationsandBoltingMaterialsforPipingandSpecialPurposeApplications.CurrenteditionapprovedMay1,2016.PublishedMay2016.Originallyapprovedin1936.Lastpreviouseditionapprovedin2015asA194/A194M–15a.DOI:10.1520/A0194_A0194M-16.2ForASMEBoilerandPressureVesselCodeapplicationsseerelatedSpecifi-cationSA-194inSectionIIofthatcode.3ForreferencedASTMstandards,visittheASTMwebsite,@astm.org.ForAnnualBookofASTMStandardsvolumeinformation,refertothestandard’sDocumentSummarypageontheASTMwebsite.*ASummaryofChangessectionappearsattheendofthisstandardCopyright©ASTMInternational,100BarrHarborDrive,POBoxC700,WestConshohocken,PA19428-2959.UnitedStates1CopyrightASTMInternationalProvidedbyIHSunderlicensewithASTMLicensee=PentairValves&ControlsUSLP/5978909001,User=Tang,XiaoleiNotforResale,06/26/201619:50:08MDTNoreproductionornetworkingpermittedwithoutlicensefromIHS--```,``,,`,,`,`,,````,`,```,`,`-`-`,,`,,`,`,,`---2.2ASMEStandards:4B1.1UnifiedScrewThreadsB1.2GagesandGagingforUnifiedInchScrewThreadsB1.13MMetricScrewThreadsB18.2.2SquareandHexNutsB18.2.4.6MMetricHeavyHexNuts2.3ISOStandards:54033HexagonHighNuts(Style2)–ProductAandB3.Terminology3.1DefinitionsofTermsSpecifictoThisStandard:3.1.1AusteniticGrades—Allgradeswithaprefixof“8”or“9.”3.1.2FerriticGrades—Grades1,2,2H,2HM,3,4,6,6F,7,7M,and16.3.1.3Lot—Unlessotherwisespecified(seeDiscussionbelow),alotisthequantityofnutsofasinglenominalsizeandgradeproducedbythesamemanufacturingprocess.3.1.3.1Discussion—WhenSupplementaryRequirementS5isinvokedonthepurchaseorder,thefollowingdefinitionsofalotshalla