ASTM_A995-A995M-18 承压设备用奥氏体和铁素体双相不锈钢铸件（英文版）

《ASTM_A995-A995M-18 承压设备用奥氏体和铁素体双相不锈钢铸件（英文版）》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、Designation:A995/A995M−18StandardSpeciÞcationforCastings,Austenitic-Ferritic(Duplex)StainlessSteel,for1Pressure-ContainingPartsThisstandardisissuedundertheÞxeddesignationA995/A995M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,i

2、nthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*A488/A488MPracticeforSteelCastings,Welding,QualiÞ-cationsofProceduresandPersonn

3、el1.1ThisspeciÞcationcoversaustenitic-ferritic(duplex)A703/A703MSpeciÞcationforSteelCastings,Generalstainlesssteelcastingsforvalves,ßanges,Þttings,andotherRequirements,forPressure-ContainingPartspressure-containingparts.E125ReferencePhotographsforMagneticParticl

4、eIndica-1.2TheduplexstainlesssteelsofferacombinationoftionsonFerrousCastingsenhancedmechanicalpropertiesandcorrosionresistancewhenE165/E165MPracticeforLiquidPenetrantExaminationforproperlybalancedincompositionandproperlyheattreated.GeneralIndustryFerritelevelsar

5、enotspeciÞed,butthesegradeswilldevelopaE562TestMethodforDeterminingVolumeFractionbyrangeofapproximately30to60%ferritewiththebalanceSystematicManualPointCountaustenite.ItistheresponsibilityofthepurchasertodetermineG48TestMethodsforPittingandCreviceCorrosionResis-

6、whichgradeshallbefurnisheddependingondesignandtanceofStainlessSteelsandRelatedAlloysbyUseofserviceconditions,mechanicalproperties,andcorrosion-FerricChlorideSolutionresistantcharacteristics.3.TerminologyNOTE1ÑBecauseofthepossibilityofprecipitationofembrittlingph

7、ases,thegradesincludedinthisspeciÞcationarenotrecommendedfor3.1DefinitionsofTermsSpecifictoThisStandard:serviceattemperaturesabove600¡F[315¡C].3.1.1duplexstainlesssteel—aniron-chromium-nickel-1.3ThevaluesstatedineitherSIunitsorinch-poundunitsmolybdenumalloywhichwh

8、enproperlyheattreatedconsistsaretoberegardedseparatelyasstandard.Thevaluesstatedinofapproximately30to60%ferritewiththebalanceaustenite.eachsystemmaynotbeexactequivale