Designation:G41−90(Reapproved2013)StandardPracticeforDeterminingCrackingSusceptibilityofMetalsExposedUnderStresstoaHotSaltEnvironment1ThisstandardisissuedunderthefixeddesignationG41;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticecoversproceduresfortestingmetalsforembrittlementandcrackingsusceptibilitywhenexposedunderstresstoahotsaltenvironment.Thispracticecanbeusedfortestingallmetalsforwhichserviceconditionsdictatetheneedforsuchinformation.Thetestproceduresdescribedhereinaregenerallyapplicabletoallmetalalloys;requiredadjustmentsinenvironmentalvariables(temperature,stress)tocharacterizeagivenmaterialssystemshouldbemade.Thispracticedescribestheenvironmentalconditionsanddegreeofcontrolrequired,andsuggestsmeansforobtainingthisdesiredcontrol.1.2Thispracticecanbeusedbothforalloyscreeningfordeterminationofrelativesusceptibilitytoembrittlementandcracking,andforthedeterminationoftime-temperature-stressthresholdlevelsforonsetofembrittlementandcracking.However,certainspecimentypesaremoresuitableforeachofthesetwotypesofcharacterizations.NOTE1—Thispracticerelatessolelytotheperformanceoftheexposuretest.Nodetaileddescriptionconcerningpreparationandanalysisofspecimentypesisoffered.However,theoptimumsampledesignmaybeonethatusesthesametypeofstressencounteredinserviceloadingsituations.Standardsdescribingprincipaltypesofstresscorrosionspecimens,theirpreparation,andanalysis,includePracticesG30,G38,andG39.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.(FormorespecificsafetyhazardstatementsseeSection8.)2.ReferencedDocuments2.1ASTMStandards:2D1141PracticeforthePrepa...
