Designation:A193/A193M−16StandardSpecificationforAlloy-SteelandStainlessSteelBoltingforHighTemperatureorHighPressureServiceandOtherSpecialPurposeApplications1ThisstandardisissuedunderthefixeddesignationA193/A193M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope*1.1Thisspecification2coversalloyandstainlesssteelbolt-ingmaterialsandboltingcomponentsforpressurevessels,valves,flanges,andfittingsforhightemperatureorhighpressureservice,orotherspecialpurposeapplications.SeeSpecificationA962/A962Mforthedefinitionofbolting.Barsandwireshallbehot-wroughtandmaybefurtherprocessedbycenterlessgrindingorbycolddrawing.Austeniticstainlesssteelmaybecarbidesolutiontreatedorcarbidesolutiontreatedandstrain-hardened.Whenstrainhardenedausteniticstainlesssteelisordered,thepurchasershouldtakespecialcaretoensurethatAppendixX1isthoroughlyunderstood.1.2Severalgradesarecovered,includingferriticsteelsandausteniticstainlesssteelsdesignatedB5,B8,andsoforth.Selectionwilldependupondesign,serviceconditions,me-chanicalproperties,andhightemperaturecharacteristics.1.3Thefollowingreferencedgeneralrequirementsarein-dispensableforapplicationofthisspecification:SpecificationA962/A962M.NOTE1—Thecommitteeformulatingthisspecificationhasincludedseveralsteeltypesthathavebeenratherextensivelyusedforthepresentpurpose.Othercompositionswillbeconsideredforinclusionbythecommitteefromtimetotimeastheneedbecomesapparent.NOTE2—Forgradesofalloy-steelboltingsuitableforuseatthelowerrangeofhightemperatureapplications,referenceshouldbemadetoSpecificationA354.NOTE3—Forgradesofalloy-steelboltingsuitableforuseinlowtemperatureapplications,referenceshouldbemadetoSpecificationA320/A320M.1.4NutsforusewithboltingarecoveredinSection13.1.5Supplement...
