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1、ThisinternationalstandardwasdevelopedinaccordancewithinternationallyrecognizedprinciplesonstandardizationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecommendationsissuedbytheWorldTradeOrganizationTechnicalBarrier
2、stoTrade(TBT)Committee.Designation:A995/A995M−18aStandardSpeciÞcationforCastings,Austenitic-Ferritic(Duplex)StainlessSteel,for1Pressure-ContainingPartsThisstandardisissuedundertheÞxeddesignationA995/A995M;thenumberimmediatelyfollowingthedesignationindicate
3、stheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*A488/A488MPracticeforSteelCastings,Welding,
4、QualiÞ-cationsofProceduresandPersonnel1.1ThisspeciÞcationcoversaustenitic-ferritic(duplex)A703/A703MSpeciÞcationforSteelCastings,Generalstainlesssteelcastingsforvalves,ßanges,Þttings,andotherRequirements,forPressure-ContainingPartspressure-containingparts.
5、E125ReferencePhotographsforMagneticParticleIndica-1.2TheduplexstainlesssteelsofferacombinationoftionsonFerrousCastingsenhancedmechanicalpropertiesandcorrosionresistancewhenE165/E165MPracticeforLiquidPenetrantExaminationforproperlybalancedincompositionandpr
6、operlyheattreated.GeneralIndustryFerritelevelsarenotspeciÞed,butthesegradeswilldevelopaE562TestMethodforDeterminingVolumeFractionbyrangeofapproximately30to60%ferritewiththebalanceSystematicManualPointCountaustenite.Itistheresponsibilityofthepurchasertodete
7、rmineG48TestMethodsforPittingandCreviceCorrosionResis-whichgradeshallbefurnisheddependingondesignandtanceofStainlessSteelsandRelatedAlloysbyUseofserviceconditions,mechanicalproperties,andcorrosion-FerricChlorideSolutionresistantcharacteristics.3.Terminolog
8、yNOTE1ÑBecauseofthepossibilityofprecipitationofembrittlingphases,thegradesincludedinthisspeciÞcationarenotrecommendedfor3.1DefinitionsofTermsSpecifictoThisStandard:serviceattemperaturesabove600¡F[315¡C].3.1.1du