【英文标准名称】:StandardTestMethodforElastomerCompatibilityofLubricatingGreasesandFluids
【原文标准名称】:润滑脂及润滑液弹性体相容性的标准试验方法
【标准号】:ASTMD4289-2003(2008)
【标准状态】:现行
【国别】:美国
【发布日期】:2003
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D02.G0.01
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:compatibility;density;elastomer;fluid;grease;immersion;lubricant;lubricatinggrease;relative;rubber;seal(s);Compatibility--petroleumproducts;Elastomericmaterials/applications;Hardnesstests;Lubricatinggrease;Specificgravity--petroleump
【摘要】:Measurementofthechangesinthevolumeandhardnessofanelastomerthatoccurfromimmersioninalubricatinggreaseorfluidprovidesameansforevaluatingrelativecompatibility.MuchofthistestmethodwasderivedfromproceduresdescribedinTestMethodD471andFederalTestMethod791C/3603.5.Incontrasttothesetwotestmethods,whichemphasizetheevaluationofrubberandrubber-likecompounds,TestMethodD4289wasdevelopedspecificallytoevaluatelubricatinggreasesandfluids,especiallythoseusedinautomotiveapplications,althoughthetestmethodcanbeappliedtolubricantsusedinindustrialapplicationsaswell.ExceptingtheShoreDurometerA,thistestmethodrequiresnospecialized,rubber-testingequipment.Virtuallyallotherequipmentandsuppliesspecifiedintheprocedurearestockitemsinlubricantslaboratories.Thevolumeandhardness-changevaluesdeterminedbythistestmethoddonotduplicatesimilarchangesthatoccurinelastomericsealsunderactualserviceconditions.However,theycanbecorrelatedinmanyinstances.Inonesuchinstance,thevolume-changevaluesdeterminedbytheantecedentofthistestmethodcorrelated(r2=0.99)withthosethatoccurredduringavehicletest.Becauseofwidevariationsinserviceconditionsanddifferencesingreaseandelastomerformulations,correlationsbetweentheresultsobtainedwiththistestmethodandparticularapplicationsshouldbedeterminedonanindividualbasis.WhentheoptionalReferenceElastomersAMS3217/2B(acrylonitrile-butadiene,NBR-L)andAMS3217/3A(chloroprene,CR)areusedtoevaluatecompatibility,theresultscanbeusedtojudgeaservicecharacteristicoflubricants.Inthisrespect,thistestmethodisusefulforlubricantspecifications(forexample,SpecificationD4950).Similarly,thistestmethodcanbeusedinspecificationsforlubricatingfluidsaswell.WithspecificationsrequiringelastomersotherthanReferenceElastomersAMS3217/2BorAMS3217/3A,couponscutfromstandardsheets(PracticeD3182)shouldbeused.Whenthepreparationofsuchcouponsisnotfeasible,orthelubricantspecificationrequirestheuseofrubberproductsthatdonothaveasuitablesizeorconfigurationforuseinpreparingcouponsfortesting(PracticeD3183),thistestmethodcanbeusedasaguideforevaluatingcompatibility.Note48212;InasmuchastheprecisionvaluesapplyonlytotheelastomersspecifiedinAnnexA1ofTestMethodD4289,whenalubricantspecificationrequiressomeotherelastomer,theuserandsupplierofthelubricantshouldagreetothevaluesofacceptableprecision.SuchvaluesmayormaynotbethesameasthoseofTestMethodD4289.Itisrecommendedthattheagreeduponprecisionvaluesbestatedintheuser''slubricantspecification.Theresultsofthistestmethodaremostapplicabletotheuseoflubricatinggreasesandfluidsincontactwithelastomericseals,boots,O-rings,andsimilarproducts,wherethephysicaldemandsontheelastomerarenotextreme.Incriticalapplicationswherethelubricantwillbeincontactwithrubberpartssubjecttosevereflexing,extremetemperatures,orsimilarstresses,otherrubberproperties,suchastensilestrengthandelongation,shouldalsobeevaluatedastheymaybemoreindicativeofthetruecompatibilitycharacteristics.1.1Thistestmethodevaluatesthecompatibilityoflubricatinggreasesandfluidswithcouponscutfromstandardelastomersheets(PracticeD3182)or,optionally,fromSAESpecificationAMS3217/2B(NBR-L)andAMS3217/3A(CR)sheets.Compatibilityisevaluatedbydeterminingthe......
【中国标准分类号】:E36
【国际标准分类号】:75_100
【页数】:8P.;A4
【正文语种】:英语

标准名称：	数控床身铣床 精度
中标分类：	机械 >> 金属切削机床 >> 钻、镗、铣床
替代情况：	被JB/T 8329.1-99代替
发布日期：
实施日期：	1991-05-01
首发日期：
作废日期：
出版日期：

没有内容

没有内容

没有内容

没有内容