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Designation:B338–06aStandardSpecificationforSeamlessandWeldedTitaniumandTitaniumAlloyTubesforCondensersandHeatExchangers1ThisstandardisissuedunderthefixeddesignationB338;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheDepartmentofDefense.1.Scope1.1Thisspecification2coverstherequirementsfor28gradesoftitaniumandtitaniumalloytubingintendedforsurfacecondensers,evaporators,andheatexchangers,asfol-lows:1.1.1Grade1—Unalloyedtitanium,1.1.2Grade2—Unalloyedtitanium,1.1.2.1Grade2H—Unalloyedtitanium(Grade2with58ksiminimumUTS),1.1.3Grade3—Unalloyedtitanium,1.1.4Grade7—Unalloyedtitaniumplus0.12to0.25%palladium,1.1.4.1Grade7H—Unalloyedtitaniumplus0.12to0.25%palladium(Grade7with58ksiminimumUTS),1.1.5Grade9—Titaniumalloy(3%aluminum,2.5%va-nadium),1.1.6Grade11—Unalloyedtitaniumplus0.12to0.25%palladium,1.1.7Grade12—Titaniumalloy(0.3%molybdenum,0.8%nickel),1.1.8Grade13—Titaniumalloy(0.5%nickel,0.05%ru-thenium),1.1.9Grade14—Titaniumalloy(0.5%nickel,0.05%ru-thenium),1.1.10Grade15—Titaniumalloy(0.5%nickel,0.05%ruthenium),1.1.11Grade16—Unalloyedtitaniumplus0.04to0.08%palladium,1.1.11.1Grade16H—Unalloyedtitaniumplus0.04to0.08%palladium(Grade16with58ksiminimumUTS),1.1.12Grade17—Unalloyedtitaniumplus0.04to0.08%palladium,1.1.13Grade18—Titaniumalloy(3%aluminum,2.5%vanadium)plus0.04to0.08%palladium,1.1.14Grade26—Unalloyedtitaniumplus0.08to0.14%ruthenium,1.1.14.1Grade26H—Unalloyedtitaniumplus0.08to0.14%ruthenium(Grade26with58ksiminimumUTS),1.1.15Grade27—Unalloyedtitaniumplus0.08to0.14%ruthenium,1.1.16Grade28—Titaniumalloy(3%aluminum,2.5%vanadium)plus0.08to0.14%ruthenium,1.1.17Grade30—Titaniumalloy(0.3%cobalt,0.05%palladium),1.1.18Grade31—Titaniumalloy(0.3%cobalt,0.05%palladium),1.1.19Grade33—Titaniumalloy(0.4%nickel,0.015%palladium,0.025%ruthenium,0.15%chromium),1.1.20Grade34—Titaniumalloy(0.4%nickel,0.015%palladium,0.025%ruthenium,0.15%chromium),1.1.21Grade35—Titaniumalloy(4.5%aluminum,2%molybdenum,1.6%vanadium,0.5%iron,0.3%silicon),1.1.22Grade36—Titaniumalloy(45%niobium),1.1.23Grade37—Titaniumalloy(1.5%aluminum),and1.1.24Grade38—Titaniumalloy(4%aluminum,2.5%vanadium,1.5%iron).NOTE1—Hgradematerialisidenticaltothecorrespondingnumericgrade(thatis,Grade2H=Grade2)exceptforthehigherguaranteedminimumUTS,andmayalwaysbecertifiedasmeetingtherequirementsofitscorrespondingnumericgrade.Grades2H,7H,16H,and26Hareintendedprimarilyforpressurevesseluse.TheHgradeswereaddedinresponsetoauserassociationrequestbasedonitsstudyofover5200commercialGrade2,7,16,and26testreports,whereover99%metthe58ksiminimumUTS.1ThisspecificationisunderthejurisdictionofASTMCommitteeB10onReactiveandRefractoryMetalsandAlloysandisthedirectresponsibilityofSubcommitteeB10.01onTitanium.CurrenteditionapprovedJune1,2006.PublishedJune2006.Originallyapprovedin1958.Lastpreviouseditionapprovedin2006asB338–06.2ForASMEBoilerandPressureVesselCodeapplications,seerelatedSpecifi-cationSB-338inSectionIIofthatCode.1Copyright©ASTMInternational,100BarrHarborDrive,POBoxC700,WestConshohocken,PA19428-2959,UnitedStates.1.2Tubingcoveredbythisspecificationshallbeheattreatedbyatleastastressreliefasdefinedin5.3.1.3Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.2.ReferencedDocuments2.1ASTMStandards:3A370TestMethodsandDefinitionsforMechanicalTestingofSteelProductsE8TestMethodsforTensionTestingofMetallicMaterialsE29PracticeforUsingSignificantDigitsinTestDatatoDetermineConformancewithSpecificationsE120TestMethodsforChemicalAnalysisofTitaniumandTitaniumAlloys4E1409TestMethodforDeterminationofOxygenandNitrogeninTitaniumandTitaniumAlloysbytheInertGasFusionTechniqueE1447TestMethodforDeterminationofHydrogeninTitaniumandTitaniumAlloysbytheInertGasFusionThermalConductivity/InfraredDetectionMethod3.Terminology3.1LotDefinitions:3.1.1castings,n—alotshallconsistofallcastingsproducedfromthesamepour.3.1.2ingot,n—nodefinitionrequired.3.1.3rounds,flats,tubes,andwroughtpowdermetallurgicalproducts(singledefinition,commontonuclearandnon-nuclearstandards.),n—alotshallconsistofamaterialofthesamesize,shape,condition,andfinishproducedfromthesameingotorpowderblendbythesamereductionscheduleandthesameheattreatmentparameters.Unlessotherwiseagreedbetweenmanufacturerandpurchaser,alotshallbelimitedtotheproductofan8hperiodforfinalcontinuousanneal,ortoasinglefurnaceloadforfinalbatchanneal.3.1.4sponge,n—alotshallconsistofasingleblendproducedatonetime.3.1.5weldfittings,n—definitionistobemutuallyagreeduponbetweenmanufacturerandthepurchaser.TABLE1ChemicalRequirementsAComposition,%ElementGrade1Grade2Grade2HGrade3Grade7Grade7HGrade9Grade11Grade12Grade13Nitrogen,max0.030.030.030.050.030.030.030.030.030.03Carbon,max0.080.080.080.080.080.080.080.080.080.08Hydrogen,B,Cmax0.0150.0150.0150.01