A334A334

Element

Grade1ACarbon,maxManganese

Phosphorus,maxSulfur,maxSiliconNickelChromiumCopperCobalt

Molybdenum

AComposition,%

Grade30.19

0.31–0.640.0250.0250.18–0.373.18–3.82............

Grade6A0.30

0.29–1.060.0250.0250.10min...............

Grade70.19

0.90max0.0250.0250.13–0.322.03–2.57............

Grade80.13

0.90max0.0250.0250.13–0.328.40–9.60............

Grade90.20

0.40–1.060.0250.025...

1.60–2.24...

0.75–1.25......

Grade110.10

0.60max0.0250.0250.35max35.0–37.00.50max...

0.50max0.50max

0.30

0.40–1.060.0250.025..................

Foreachreductionof0.01%carbonbelow0.30%,anincreaseof0.05%manganeseabove1.06%willbepermittedtoamaximumof1.35%manganese.

6.2.1QuenchedandTempered—Heattoauniformtempera-tureof1475625°F[800615°C];holdatthistemperatureforaminimumtimeintheratioof1h/in.[2min/mm]ofthickness,butinnocaselessthan15min;quenchbyimmersionincirculatingwater.Reheatuntilthepipeattainsauniformtemperaturewithintherangefrom1050to1125°F[565to605°C];holdatthistemperatureforaminimumtimeintheratioof1h/in.[2min/mm]ofthickness,butinnocaselessthan15min;coolinairorwaterquenchataratenolessthan300°F[165°C]/h.

6.2.2DoubleNormalizedandTempered—Heattoauni-formtemperatureof1650625°F[900615°C];holdatthistemperatureforaminimumtimeintheratioof1h/in.[2min/mm]ofthickness,butinnocaselessthan15min;coolinair.Reheatuntilthepipeattainsauniformtemperatureof1450625°F[790615°C];holdatthistemperatureforaminimumtimeintheratioof1h/in.[2min/mm]ofthickness,butinnocaselessthan15min;coolinair.Reheattoauniformtemperaturewithintherangefrom1050to1125°F[565to605°C];holdatthistemperatureforaminimumtimeof1h/in.[2min/mm]ofthicknessbutinnocaselessthan15min;coolinairorwaterquenchataratenotlessthan300°F[165°C]/h.6.3Materialfromwhichimpactspecimensareobtainedshallbeinthesameconditionofheattreatmentasthefinishedtubes.

6.4WhethertoannealGrade11tubesisperagreementbetweenpurchaserandsupplier.WhenGrade11tubesareannealedtheyshallbenormalizedintherangeof1400to1600°F[760to870°C].

7.ChemicalComposition

7.1ThesteelshallconformtotherequirementsastochemicalcompositionprescribedinTable1.

7.2WhenGrades1or6areorderedunderthisspecification,supplyinganalloygradethatspecificallyrequirestheadditionofanyelementotherthanthoselistedfortheorderedgradeinTable1isnotpermitted.However,theadditionofelementsrequiredforthedeoxidationofthesteelispermitted.8.ProductAnalysis

8.1Ananalysisofeitheronebilletoronelengthofflat-rolledstockoronetubeshallbemadeforeachheat.Thechemicalcompositionthusdeterminedshallconformtotherequirementsspecified.

8.2Iftheoriginaltestforproductanalysisfails,retestsof

twoadditionalbillets,lengthsofflat-rolledstock,ortubesshallbemade.Bothretests,fortheelementsinquestion,shallmeettherequirementsofthespecification;otherwiseallremainingmaterialintheheatorlot(Note2andNote3)shallberejectedor,attheoptionofthemanufacturer,eachbillet,lengthofflat-rolledstock,ortubemaybeindividuallytestedforaccep-tance.Billets,lengthsofflat-rolledstock,ortubeswhichdonotmeettherequirementsofthespecificationshallberejected.

NOTE2—Forflattening,flare,andflangerequirements,thetermlotappliestoalltubespriortocuttingofthesamenominalsizeandwallthicknesswhichareproducedfromthesameheatofsteel.Whenfinalheattreatmentisinabatch-typefurnace,alotshallincludeonlythosetubesofthesamesizeandfromthesameheatwhichareheattreatedinthesamefurnacecharge.Whenthefinalheattreatmentisinacontinuousfurnace,thenumberoftubesofthesamesizeandfromthesameheatinalotshallbedeterminedfromthesizeofthetubesasprescribedinTable2.

NOTE3—Fortensileandhardnesstestrequirements,thetermlotappliestoalltubespriortocutting,ofthesamenominaldiameterandwallthicknesswhichareproducedfromthesameheatofsteel.Whenfinalheattreatmentisinabatch-typefurnace,alotshallincludeonlythosetubesofthesamesizeandthesameheatwhichareheattreatedinthesamefurnacecharge.Whenthefinalheattreatmentisinacontinuousfurnace,alotshallincludealltubesofthesamesizeandheat,heattreatedinthesamefurnaceatthesametemperature,timeatheatandfurnacespeed.

9.TensileRequirements

9.1ThematerialshallconformtotherequirementsastotensilepropertiesprescribedinTable3.

10.HardnessRequirements

10.1ThetubesshallhaveahardnessnumbernotexceedingthoseprescribedinTable4.

11.ImpactRequirements

11.1ForGrades1,3,6,7and9,thenotched-barimpactpropertiesofeachsetofthreeimpactspecimens,including

TABLE2Heat-TreatmentLot

SizeofTube

2in.[50.8mm]andoverinoutsidediameterand0.200in.[5.1mm]andoverinwallthickness

Under2in.[50.8mm]butover1in.[25.4mm]inoutsidediameter,orover1in.[25.4mm]inoutsidediameterandunder0.200in.[5.1mm]inthickness

1in.[25.4mm]orunderinoutsidediameter

SizeofLotnotmorethan50tubes

notmorethan75tubes

notmorethan125tubes

TABLE3TensileRequirements

Grade1

MPa

380205

Grade3

MPa

450240

Grade6

MPa

415240

Grade7

MPa

450240

Grade8ksiMPa10075

690520

Grade9

MPa

435315

Grade11ksiMPa6535

450240

ksi

TensileStrength,minYieldStrength,min

Elongationin2in.or50mm(or4D),min,%:

Basicminimumelongationforwalls5⁄16in.[8mm]andoverin

thickness,striptests,andforallsmallsizestestedinfullsectionWhenstandardround2-in.or50mmgagelengthorproportionallysmallersizespecimenwiththegagelengthequalto4D(4timesthediameter)isused

Forstriptests,adeductionforeach1⁄32in.[0.8mm]decreaseinwallthicknessbelow5⁄16in.[8mm]fromthebasicminimumelonga-tionofthefollowingpercentagepoints

ABksi6535

ksi6035

ksi6535

ksi6346

5530

35303030222818A2822222216......

1.75B1.50B1.50B1.50B1.25B1.50B...

ElongationofGrade11isforallwallsandforsmallsizestestedinfullsection.Thefollowingtablegivesthecalculatedminimumvalues:

WallThicknessin.

516932Elongationin2in.or50mm,min%Amm

Grade1

Grade3

Grade6

Grade7302827262422212018

Grade8222120181716151312

Grade9282625242220191816

⁄(0.312)8353030⁄(0.281)7.23328281⁄4(0.250)6.43227277⁄32(0.219)5.63026263⁄16(0.188)4.82824245⁄32(0.156)42622221⁄8(0.125)3.22521213⁄32(0.094)2.42320201⁄16(0.062)1.6211818ACalculatedelongationrequirementsshallberoundedtothenearestwholenumber.Note—Theabovetablegivesthecomputedminimumelongationvaluesforeach1⁄32-in.[0.8-mm]decreasetwovaluesshownabove,theminimumelongationvalueisdeterminedbythefollowingequations:

Grade136789

where:E5elongationin2in.or50mm,%,andt5actualthicknessofspecimen,in.[mm].

Ainwallthickness.Wherethewallthicknessliesbetween

EquationAEEEEEE55555556t48t48t48t40t48t

++++++17.5015.0015.0015.009.5013.00

[E[E[E[E[E[E5555552.19t1.87t1.87t1.87t1.56t1.87t

++++++17.50]15.00]15.00]15.00]9.50]13.00]

TABLE4MaximumHardnessNumber

Grade1367811

RockwellB85B90B90B90...B90

Brinell163190190190...190

TABLE5ImpactRequirementsforGrades1,3,6,7,and9

SizeofMinimumAverageNotchedMinimumNotchedBarImpactSpecimen,mmBarImpactValueofEachSetValueofOneSpecimenOnly

ofThreeSpecimensAofaSetAft·lbf

10

1010101010

AJ181412975

ft·lbf1087533

J14119744

specimensfortheweldedjointinweldedpipewithwallthicknessesof0.120in.[3mm]andlarger,whentestedattemperaturesinconformancewith13.1shallbenotlessthanthevaluesprescribedinTable5.TheimpacttestisnotrequiredforGrade11.

11.1.1Iftheimpactvalueofonespecimenisbelowtheminimumvalue,ortheimpactvaluesoftwospecimensarelessthantheminimumaveragevaluebutnotbelowtheminimum

bybybybybyby107.56.6753.332.513109754

Straightlineinterpolationforintermediatevaluesispermitted.

valuepermittedonasinglespecimen,aretestshallbeallowed.Theretestshallconsistofbreakingthreeadditionalspecimensandeachspecimenmustequalorexceedtherequiredaverage

value.Whenanerraticresultiscausedbyadefectivespeci-men,orthereisuncertaintyintestprocedures,aretestwillbeallowed.

11.2ForGrade8eachofthenotchedbarimpactspecimensshalldisplayalateralexpansionoppositethenotchnotlessthan0.015in.[0.38mm].

11.2.1Whentheaveragelateralexpansionvalueforthethreeimpactspecimensequalsorexceeds0.015in.[0.38mm]andthevalueforonespecimenisbelow0.015in.[0.38mm]butnotbelow0.010in.[0.25mm],aretestofthreeadditionalspecimensmaybemade.Thelateralexpansionofeachoftheretestspecimensmustequalorexceed0.015in.[0.38mm].11.2.2LateralexpansionvaluesshallbedeterminedinaccordancewithTestMethodsandDefinitionsA370.

11.2.3Thevaluesofabsorbedenergyinfoot-poundsandthefractureappearanceinpercentageshearshallberecordedforinformation.Arecordofthesevaluesshallberetainedforaperiodofatleast2years.

12.MechanicalTests

12.1TensionTest—Onetensiontestshallbemadeonaspecimenforlotsofnotmorethan50tubes.Tensiontestsshallbemadeonspecimensfromtwotubesforlotsofmorethan50tubes(Note3).

12.2FlatteningTest—Oneflatteningtestshallbemadeonspecimensfromeachendofonefinishedtubeofeachlot(Note2)butnottheoneusedfortheflareorflangetest.

12.3FlareTest(SeamlessTubes)—Oneflaretestshallbemadeonspecimensfromeachendofonefinishedtubeofeachlot(Note2),butnottheoneusedfortheflatteningtest.

12.4FlangeTest(WeldedTubes)—Oneflangetestshallbemadeonspecimensfromeachendofonefinishedtubeofeachlot(Note2),butnottheoneusedfortheflatteningtest.

12.5ReverseFlatteningTest—Forweldedtubes,onere-verseflatteningtestshallbemadeonaspecimenfromeach1500ft[460m]offinishedtubing.

12.6HardnessTest—BrinellorRockwellhardnesstestsshallbemadeonspecimensfromtwotubesfromeachlot(Note3).

12.7ImpactTests—Onenotched-barimpacttest,consistingofbreakingthreespecimens,shallbemadefromeachheatrepresentedinaheat-treatmentloadonspecimenstakenfromthefinishedtube.Thistestshallrepresentonlytubesfromthesameheat,whichhavewallthicknessesnotexceedingbymorethan1⁄4in.[6.3mm]thewallthicknessesofthetubefromwhichthetestspecimensaretaken.Ifheattreatmentisperformedincontinuousorbatch-typefurnacescontrolledwithina50°F[30°C]rangeandequippedwithrecordingpyrometerswhichyieldcompleteheat-treatmentrecords,thenonetestfromeachheatinacontinuousrunonlyshallberequiredinsteadofonetestfromeachheatineachheat-treatmentload.

12.8ImpactTests(WeldedTubes)—Onweldedtube,addi-tionalimpacttestsofthesamenumberasrequiredin12.7shallbemadetotesttheweld.

12.9Specimensshowingdefectswhilebeingmachinedorpriortotestingmaybediscardedandreplacementsshallbeconsideredasoriginalspecimens.

13.SpecimensforImpactTest

13.1Notched-barimpactspecimensshallbeofthesimplebeam,Charpy-type,inaccordancewithMethodsE23,TypeA,withaVnotch.Standardspecimens10by10mmincrosssectionshallbeusedunlessthematerialtobetestedisofinsufficientthickness,inwhichcasethelargestobtainablesubsizespecimensshallbeused.Charpyspecimensofwidthalongthenotchlargerthan0.394in.[10mm]orsmallerthan0.099in.[2.5mm]arenotprovidedforinthisspecification.13.2Testspecimensshallbeobtainedsothatthelongitudi-nalaxisofthespecimenisparalleltothelongitudinalaxisofthetubewhiletheaxisofthenotchshallbeperpendiculartothesurface.Onwallthicknessesof1in.[25mm]orless,thespecimensshallbeobtainedwiththeiraxialplanelocatedatthemidpoint;onwallthicknessesover1in.[25mm],thespeci-mensshallbeobtainedwiththeiraxialplanelocated1⁄2in.[12.5mm]fromtheoutersurface.

13.3Whentestingweldsthespecimenshallbe,wheneverdiameterandthicknesspermits,transversetothelongitudinalaxisofthetubewiththenotchofthespecimenintheweldedjointandperpendiculartothesurface.Whendiameterandthicknessdoesnotpermitobtainingtransversespecimens,longitudinalspecimensinaccordancewith14.2shallbeobtained.Thebottomofthenotchshallbelocatedattheweldjoint.

14.ImpactTest

14.1Exceptwhenthesizeofthefinishedtubeisinsufficienttopermitobtainingsubsizeimpactspecimens,allmaterialfurnishedunderthisspecificationandmarkedinaccordancewithSection16shallbetestedforimpactresistanceatthetemperaturefortherespectivegradesasprescribedinTable6.14.1.1Specialimpacttestsonindividuallotsofmaterialmaybemadeatothertemperaturesifagreeduponbetweenthemanufacturerandthepurchaser.

14.2Thenotched-barimpacttestshallbemadeinaccor-dancewiththeprocedureforthesimplebeam,Charpy-typeoftestofMethodsE23.

14.3Impacttestsspecifiedfortemperatureslowerthan+70°F[20°C]shouldbemadewiththefollowingprecautions.Theimpacttestspecimensaswellasthehandlingtongsshallbecooledasufficienttimeinasuitablecontainersothatbothreachthedesiredtemperature.Thetemperatureshallbemea-suredwiththermocouples,thermometers,oranyothersuitabledevicesandshallbecontrolledwithin63°F[2°C].ThespecimensshallbequicklytransferredfromthecoolingdevicetotheanviloftheCharpyimpacttestingmachineandbrokenwithatimelapseofnotmorethan5s.

TABLE6ImpactTemperature

Grade

ImpactTestTemperature

°F

°C1−50−453−150−1006−50−457−100−758−320−1959

−100

−75

14.4WhensubsizeCharpyimpactspecimensareusedandthewidthalongthenotchislessthan80%oftheactualwallthicknessoftheoriginalmaterial,thespecifiedCharpyimpacttesttemperatureforGrades1,3,6,7,and9shallbelowerthantheminimumtemperatureshowninTable6fortherespectivegrade.Underthesecircumstancesthetemperaturereductionvaluesshallbebyanamountequaltothedifference(asshowninTable7)betweenthetemperaturereductioncorrespondingtotheactualmaterialthicknessandthetemperaturereductioncorrespondingtoCharpyspecimenwidthactuallytested.Theappendixshowssomeexamplesofhowthetemperaturereductionsaredetermined.

15.HydrostaticorNondestructiveElectricTest

15.1Eachtubeshallbesubjectedtothenondestructiveelectrictestorthehydrostatictest.Thetypeoftesttobeusedshallbeattheoptionofthemanufacturer,unlessotherwisespecifiedinthepurchaseorder.

16.ProductMarking

16.1Exceptasmodifiedin16.1.1,inadditiontothemarkingprescribedinSpecificationA450/A450M,themark-ingshallincludewhetherhot-finished,cold-drawn,seamless,orwelded,andtheletters“LT”followedbythetemperatureat

TABLE7ImpactTemperatureReduction

SpecimenWidthAlongNotchorActual

MaterialThicknessAInches0.3940.3540.3150.2950.2760.2620.2360.1970.1580.1310.1180.099

ATemperatureReduction,

DegreesColder°F0005810152030354050

°C00034581117192228

Millimetres

10(standardsize)98

7.5(3⁄4standardsize)7

6.67(2⁄3standardsize)6

5(1⁄2standardsize)4

3.33(1⁄3standardsize)3

2.5(1⁄4standardsize)

Straightlineinterpolationforintermediatevaluesispermitted.

whichtheimpacttestsweremade,exceptwhenalowertesttemperatureisrequiredbecauseofreducedspecimensize,inwhichcase,thehigherimpacttesttemperatureapplicabletoafull-sizespecimenshouldbemarked.

16.1.1Whenthesizeofthefinishedtubeisinsufficienttoobtainsubsizeimpactspecimens,themarkingshallnotincludethelettersLTfollowedbyanindicatedtesttemperatureunlessSupplementaryRequirementS1isspecified.

SUPPLEMENTARYREQUIREMENTS

Thefollowingsupplementaryrequirementshallapplyonlywhenspecifiedbythepurchaserintheinquiry,contract,ororder.

S1.NonstandardTestSpecimens

S1.1Whenthesizeofthefinishedtubeisinsufficienttopermitobtainingsubsizeimpactspecimens,testingshallbeamatterofagreementbetweenthemanufacturerandthepur-chaser.

APPENDIX

(NonmandatoryInformation)

X1.DETERMINATIONOFTEMPERATUREREDUCTIONS

X1.1Underthecircumstancesstatedin14.4,theimpacttesttemperaturesspecifiedinTable6mustbelowered.Thefollowingexamplesareofferedtodescribetheapplicationoftheprovisionsof14.4.

X1.1.1Whensubsizespecimensareused(see13.1)andthewidthalongthenotchofthesubsizespecimenis80%orgreateroftheactualwallthicknessoftheoriginalmaterial,theprovisionsof14.4donotapply.

X1.1.1.1Forexample,iftheactualwallthicknessofpipewas0.200in.[5.0mm]andthewidthalongthenotchofthelargestsubsizespecimenobtainableis0.160in.[4mm]orgreater,noreductionintesttemperatureisrequired.

X1.1.2Whenthewidthalongthesubsizespecimennotchislessthan80%oftheactualwallthicknessofthepipe,therequiredreductionintesttemperatureiscomputedbytakingthedifferencebetweenthetemperaturereductionvaluesshowninTable7fortheactualpipethicknessandthespecimenwidthused.

X1.1.2.1Forexample,ifthepipewere0.262in.[6.67mm]thickandthewidthalongtheCharpyspecimennotchwas3.33mm(1/3standardsize),thetesttemperaturewouldhavetobeloweredby25°F[14°C](thatis,thetemperaturereductioncorrespondingtothesubsizespecimenis35°F[19°C],thetemperaturereductioncorrespondingtotheactualpipethick-nessis10°F[5°C];thedifferencebetweenthesetwovaluesistherequiredreductionintesttemperature).

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