Designation:A519/A519M−17StandardSpecificationforSeamlessCarbonandAlloySteelMechanicalTubing1ThisstandardisissuedunderthefixeddesignationA519/A519M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope*1.1Thisspecificationcoversseveralgradesofcarbonandalloysteelseamlessmechanicaltubing.ThegradesarelistedinTables1-3.Whenweldingisusedforjoiningtheweldablemechanicaltubegrades,theweldingprocedureshallbesuit-ableforthegrade,theconditionofthecomponents,andtheintendedservice.1.2Thisspecificationcoversbothseamlesshot-finishedmechanicaltubingandseamlesscold-finishedmechanicaltubinginsizesuptoandincluding123⁄4in.[325mm]outsidediameterforroundtubeswithwallthicknessesasrequired.1.3Thetubesshallbefurnishedinthefollowingshapes,asspecifiedbythepurchaser:round,square,rectangular,andspecialsections.1.4Supplementaryrequirementsofanoptionalnatureareprovidedandwhendesiredshallbesostatedintheorder.1.5ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasthestandard.Withinthetext,theSIunitsareshowninbracketsorparentheses.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combin-ingvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.Theinch-poundunitsshallapplyunlessthe“M”designationofthisspecificationisspecifiedintheorder.Inthisspecificationhardorrationalizedconversionsapplytodiameter,lengthsandtensileproperties.SoftconversionappliestootherSImeasurements.1.6Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoT...
