Designation:G142−98(Reapproved2016)StandardTestMethodforDeterminationofSusceptibilityofMetalstoEmbrittlementinHydrogenContainingEnvironmentsatHighPressure,HighTemperature,orBoth1ThisstandardisissuedunderthefixeddesignationG142;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversaprocedurefordeterminationoftensilepropertiesofmetalsinhighpressureorhightemperature,orboth,gaseoushydrogen-containingenviron-ments.Itincludesaccommodationsforthetestingofeithersmoothornotchedspecimens.1.2Thistestmethodappliestoallmaterialsandproductformsincluding,butnotrestrictedto,wroughtandcastmaterials.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesareforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D1193SpecificationforReagentWaterE4PracticesforForceVerificationofTestingMachinesE8TestMethodsforTensionTestingofMetallicMaterialsE691PracticeforConductinganInterlaboratoryStudytoDeterminethePrecisionofaTestMethodG15TerminologyRelatingtoCorrosionandCorrosionTest-ing(Withdrawn2010)3G111GuideforCorrosionTestsinHighTemperatureorHighPressureEnvironment,orBothG129PracticeforSlowStrainRateTestingtoEvaluatetheSusceptibilityofMetallicMaterialstoEnvironmentallyAssistedCracking2.2MilitaryStandard:4MIL-P-27201BPropellant,Hydrogen3.Terminology3.1Definitions:3.1.1controltest,n—amechanicaltestconductedinanenvironmentthatdoesnotproduceembrittlementofatestmaterial.3.1.2hydrogenembrittlement,n—hydrogeninducedcrack-ingorseverelossofductilitycausedbythepresenceofhydrogeninthemetal.3.1.3Otherdefini...
