SAEJ174m-1998-公制钢螺纹紧固件力矩——应力试验规程

SAETechnicalStandardsBoardRulesprovidethat:“ThisreportispublishedbySAEtoadvancethestateoftechnicalandengineeringsciences.Theuseofthisreportisentirelyvoluntary,anditsapplicabilityandsuitabilityforanyparticularuse,includinganypatentinfringementarisingtherefrom,isthesoleresponsibilityoftheuser.”SAEreviewseachtechnicalreportatleasteveryfiveyearsatwhichtimeitmaybereaffirmed,revised,orcancelled.SAEinvitesyourwrittencommentsandsuggestions.QUESTIONSREGARDINGTHISDOCUMENT:[phone]FAX:[phone]TOPLACEADOCUMENTORDER;[phone]FAX:[phone]SAEWEBADDRESS—METRICSERIESForeword—Onsomeapplicationsofthreadedfasteners,itisdesirabletocontroltheamountofdevelopedtensionwhenaspecificrangeoftorquehasbeenappliedorthetorquerequiredtodevelopaspecificrangeoftension.Accuratetorque-tensionrelationshipscanbeachievedonlybyuniquelydefiningandcontrollingthemanyrelatedtestparameters,suchas:materials,theirhardnessandfinishcoatings,matingpartinterferencefit,lubricationbetweenbothmatedparts,thepresenceofforeignmaterialsasrust,dust,andburrs,temperatureandhumidity,andwhetherthetighteningisbyhandorpowertoolturnnutorboltwrenching.1.Scope—Thistestprocedureisintendedtoprovideaqualitycontrolmethodforcheckingtorque-tensioncharacteristicsofnon-prevailingtorque-typethreadedsteelfasteners6through24mmnominaldiameters.Realistically,torque-tensionrelationshipsforspecificindividualfastenerassemblyjointswillvaryduetothedifferentjointparameters.Testsusingactualjointcomponentswillberequiredtodetermineaccuratetorque-tensionvaluesforthoseconditions.Fortheinchseriesversion,seeSAEJ174.2.References2.1ApplicablePublications—Thefollowingpublicationsformapartofthisspecificationtotheextentspecifiedherein.Unlessotherwisespecified,thelatestissueofSAEpublicationsshallapply.2.1.1SAEPUBLICATIONS—AvailablefromSAE,400CommonwealthDrive,Warrendale,PA15096-0001.SAEJ174—Torque-TensionTestProcedureforSteelThreadedFasteners—InchSeriesSAEJ1199—MechanicalandMaterialRequirementsforMetricExternallyThreadedSteelFasteners2.1.2ASTMPUBLICATION—AvailablefromASTM,100BarrHarborDrive,WestConshohocken,PA19428-2959.ASTMA563M—SpecificationforCarbonandAlloySteelNuts(Metric)ASTMB117—MethodofSaltSpray(Fog)TestingASTMB487—MethodforMeasurementofMetalandOxideCoatingThicknessesbyMicroscopicalExaminationofaCrossSectionSAE174MReaffirmedMAY1998-2-3.TestMaterial3.1TestBolt—Whenevaluatingnuts,testboltsconformingtoSAEJ1199,propertyclass10.9requirementsshallbeused.Threadsshallgagetothesameclassoffitasthenuts.Threadsonallboltsshallbeproducedbyrolling.Boltsshallbefreefromburrs,loosescale,andcontamination.Thistestprocedurecanbeappliedtotestboltswithdifferentfinishcoatings.Buttocomparetorque-tensionboltqualityresults,variouslots,and/ormanufacturers,thefinishshallbezincphosphateandoil,meetinga72-hsaltspraylifewhentestedinaccordancewithASTMB117.NOTE—Thelubricantshallneitherbeaddedorremovedfromthetestmaterial.ItshallbedrytothetouchasdeterminedbyWaterman#41filterblottest.3.2TestWasher—Washersshallconformtothedimensional,metallurgical,andfinishrequirementsgiveninTable1.(SeealsoFigure1.)Optionally,clippedwashersormultiholeplatesorstripsmaybeusedprovidingtheyconformtothepreviousrequirements.TABLE1—TESTWASHERS—WASHERDIMENSIONS—mmNominalFastenerSizeInsideDiaA(1)1.ThewasherIDisintendedforusewithhexboltsandallnuts.Toaccommodateotherboltswithlargerunderheadfilletradii,washerholediametershallbeincreasedproportionallytoallowbearingsurfaceofboltheadtoseat.NOTES1.Alldimensionsareinmillimeters.2.Squarewashersarepreferred.Useofroundwashersisacceptableduringatransitionperiodtoexclusiveuseofsquarewashers.3.MaterialshallbecarbonsteelwithachemicalcompositionofC,0.48-0.60%;Mn,0.60-1.50%;P,0.035%max;andS,0.045%max;quenchedandtempered,withasurfacehardnessof498-595HVandacorehardnessof446-677HV.4.Washersshallbeelectrodepositedzincplatedtoacoatingthicknessof5to10µmandshallbesubjectedtonoadditionalsurfacetreatment.Assoonaspracticablefollowingplating,washersshallbebakedfor1hat190°C±15°C.PlatingthicknessshallbecheckedinaccordancewithASTMB487(MicroscopicTest).5.Washersshallbefreefromburrsandsharpedges.OutsideDiaBWidthDThicknessCMaxThicknessCMinM67.0/6.817.0/16.417.0/16.42.01.8M89.4/9.220.0/19.420.0/19.42.01.8M1011.4/11.223.0/22.423.0/22.42.01.8M1213.9/13.729.6/29.029.6/29.03.12.9M1415.9/15.732.7/32.132.7/32.13.12.9M1618.0/17.836.4/35.836.4/35.83.12.9M2022.6/22.442.9/42.342.9/42.34.13.9M2426.6/26.455.8/55.255.8/55.24.13.0SAE174MReaffirmedMAY1998-3-FIGURE1—TESTWASHERSSAE174MReaffirmedMAY1998-4-3.3TestNut—Whenevaluatingbolts,testnutsconformingtoASTMA563Mmetricpropertyclass10requirementsshallbeusedtoevaluatebolts.Threadsshallgagetothesameclassoffitasthebolts.Nutsshallbefreefromburrs,loosescale,andcon