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【英文标准名称】:StandardTestMethodforResidualEmbrittlementinMetallicCoated,ExternallyThreadedArticles,Fasteners,andRod8212;InclinedWedgeMethod
【原文标准名称】:金属镀覆的外螺纹制品,紧固件和棒的残留脆变的标准试验方法.倾斜楔入法
【标准号】:ASTMB839-2004(2009)
【标准状态】:现行
【国别】:美国
【发布日期】:2004
【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】:B08.10
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:hydrogenembrittlementtest;metalliccoated;residualembrittlementtest;testingthreadedarticles;threadedfasteners;threadedrod;Embrittlement;Externallythreadedarticles/fasteners/rods;Fasteners;Hydrogenembrittlement(HE);Metalliccoati
【摘要】:Theuseofthistestmethodcansignificantlyreducetheriskofsuddencatastrophicfailureofthreadedarticlesandfasteners,belowtheirdesignstrength,duetohydrogenembrittlement.1.1Thistestmethodcoversthedeterminationof,onastatisticalbasis,theprobabilityoftheexistenceofhydrogenembrittlementordegradationin:1.1.1Abatchofbarrelelectroplated,autocatalyticplated,phosphated,orchemicallyprocessedthreadedarticlesorfastenersand1.1.2Abatchofrackplatedthreadedarticles,fasteners,orrod.1.2Industrialpracticeforthreadedarticles,fasteners,androdhasevolvedthreegraduatedlevelsoftestexposuretoensurereducedriskofhydrogenembrittlement(seeSection3).Theselevelshaveevolvedfromcommercialapplicationshavingvaryinglevelsofcriticality.Inessence,theyrepresenttheconfidencelevelthatisrequired.Theyalsorepresentthetimethatfinishedgoodsareheldbeforetheycanbeshippedandused.Thistimeequatestoadditionalcosttothemanufacturerthatmayofnecessitybeaddedtothecostofthefinishedgoods.1.3Thistestmethodisapplicabletothreadedarticles,fasteners,androdmadefromsteelwithx2265;1000MPa(withcorrespondinghardnessvaluesof300HV10kgf,303HB,or31HRc)orsurfacehardenedthreadedarticles,fasteners,orrod.1.4ThistestmethodshallbecarriedoutafterhydrogenembrittlementreliefheattreatmentinaccordancewiththerequirementsofGuideB850.Itmayalsobeusedforassessingdifferencesinprocessingsolutions,conditions,andtechniques.Thistestmethodhastwomainfunctions:first,whenusedwithastatisticalsamplingplanitcanbeusedforlotacceptanceorrejection,andsecond,itcanbeusedasacontroltesttodeterminetheeffectivenessofthevariousprocessingstepsincludingpre-andpost-bakingtreatmentstoreducethemobilehydrogeninthearticles,fasteners,orrod.WhilethistestmethodiscapableofindicatingthoseitemsthatareembrittledtotheextentdefinedinSection3,itdoesnotguaranteecompletefreedomfromembrittlement.1.5Thistestmethoddoesnotrelievetheprocessorfromimposingandmonitoringsuitableprocesscontrol.1.6ThistestmethodhasbeencoordinatedwithISO/DIS10587andistechnicallyequivalent.(Warning8212;Greatcareshouldbetakenwhenapplyingthistestmethod.Theheadsofembrittledarticles,fasteners,orrodmaysuddenlybreakoffandbecomeflyingprojectilescapableofcausingblindnessorotherseriousinjury.Thishazardcanoccuraslongas200hafterthetesthasstarted.Hence,shieldsorotherapparatusshouldbeprovidedtoavoidsuchinjury.)Note18212;TestMethodF1940canbeusedasaprocesscontrolandverificationtopreventhydrogenembrittlementinfastenerscoveredbythistestmethod.Note28212;Theuseofinhibitorsinacidpicklingbathsdoesnotnecessarilyguaranteeavoidanceofhydrogenembrittlement.1.7Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:J13
【国际标准分类号】:21_060_01
【页数】:4P.;A4
【正文语种】:英语


Product Code:SAE AMS5695
Title:Steel, Corrosion and Heat Resistant, Covered Welding Electrodes 25cr 20ni (Cancelled Jun 2000)
Issuing Committee:Ams F Corrosion Heat Resistant Alloys Committee
Scope:This specification covers a corrosion and heat resistant steel in the form of covered welding electrodes.