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【英文标准名称】:StandardTestMethodforEvaluatingStress-CorrosionCrackingofStainlessAlloyswithDifferentNickelContentinBoilingAcidifiedSodiumChlorideSolution
【原文标准名称】:沸腾酸化氯化钠溶液中不同镍合量不锈钢合金应力腐蚀裂纹评定的标准试验方法
【标准号】:ASTMG123-2000(2005)
【标准状态】:现行
【国别】:
【发布日期】:2000
【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】:G01.06
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:弯曲样品;玻璃器皿;镍含量;不锈钢;钢;应力;应力腐蚀;试验
【英文主题词】:boilingacidifiedsodiumchloride(NaCl);glassware;histograms;stresscorrosioncracking;U-bendspecimens;UNSN
【摘要】:Thistestmethodisdesignedtocomparealloysandmaybeusedasonemethodofscreeningmaterialspriortoservice.Ingeneral,thistestmethodismoreusefulforstainlesssteelsthantheboilingmagnesiumchloridetestofPracticeG36.Theboilingmagnesiumchloridetestcracksmaterialswiththenickellevelsfoundinrelativelyresistantausteniticandduplexstainlesssteels,thusmakingcomparisonsandevaluationsformanyserviceenvironmentsdifficult.Thistestmethodisintendedtosimulatecrackinginwater,especiallycoolingwatersthatcontainchloride.Itisnotintendedtosimulatecrackingthatoccursathightemperatures(greaterthan200x00B0;Cor390x00B0;F)withchlorideorhydroxide.Note18212;Thedegreeofcrackingresistancefoundinfull-immersiontestsmaynotbeindicativeofthatforsomeserviceconditionscomprisingexposuretothewater-lineorinthevaporphasewherechloridesmayconcentrate.Correlationwithserviceexperienceshouldbeobtainedwhenpossible.Differentchlorideenvironmentsmayrankmaterialsinadifferentorder.Ininterlaboratorytesting,thistestmethodcrackedannealedUNSS30400andS31600butnotmoreresistantmaterials,suchasannealedduplexstainlesssteelsorhighernickelalloys,forexample,UNSN08020(forexample20Cb-34stainless).ThesemoreresistantmaterialsareexpectedtocrackwhenexposedtoPracticeG36asU-bends.MaterialswhichwithstandthissodiumchloridetestforalongerperiodthanUNSS30400orS31600maybecandidatesformoresevereserviceapplications.TherepeatabilityandreproducibilitydatafromSection12andAppendixX1mustbeconsideredpriortouse.Interlaboratoryvariationinresultsmaybeexpectedasoccurswithmanycorrosiontests.Acceptancecriteriaarenotpartofthistestmethodandifneededaretobenegotiatedbytheuserandtheproducer.1.1Thistestmethoddescribesaprocedureforconductingstress-corrosioncrackingtestsinanacidifiedboilingsodiumchloridesolution.Thistestmethodisperformedin25%(bymass)sodiumchlorideacidifiedtopH1.5withphosphoricacid.Thistestmethodisconcernedprimarilywiththetestsolutionandglassware,althoughaspecificstyleofU-bendtestspecimenissuggested.1.2ThistestmethodisdesignedtoprovidebettercorrelationwithchemicalprocessindustryexperienceforstainlesssteelsthanthemoresevereboilingmagnesiumchloridetestofPracticeG36.SomestainlesssteelswhichhaveprovidedsatisfactoryserviceinmanyenvironmentsreadilycrackinPracticeG36,buthavenotcrackedduringinterlaboratorytestingusingthissodiumchloridetestmethod.1.3Thisboilingsodiumchloridetestmethodwasusedinaninterlaboratorytestprogramtoevaluatewroughtstainlesssteels,includingduplex(ferrite-austenite)stainlessandanalloywithuptoabout33%nickel.Itmayalsobeemployedtoevaluatethesetypesofmaterialsinthecastorweldedconditions.1.4Thistestmethoddetectsmajoreffectsofcomposition,heattreatment,microstructure,andstressonthesusceptibilityofmaterialstochloridestress-corrosioncracking.Smalldifferencesbetweensamplessuchasheat-to-heatvariationsofthesamegradearenotlikelytobedetected.1.5ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandard......
【中国标准分类号】:H40
【国际标准分类号】:77_060
【页数】:10P.;A4
【正文语种】: