ASTM B423

Designation:B423–11

StandardSpecificationfor

Nickel-Iron-Chromium-Molybdenum-CopperAlloy

(UNSN08825,N08221,andN06845)SeamlessPipeand

Tube

1

ThisstandardisissuedunderthefixeddesignationB423;thenumberimmediatelyfollowingthedesignationindicatestheyearof

originaladoptionor,inthecaofrevision,theyearoflastrevision.Anumberinparenthesindicatestheyearoflastreapproval.A

superscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.

1.Scope*B829SpecificationforGeneralRequirementsforNickel

1.1Thisspecification

2

coversnickel-iron-chromium-

molybdenum-copperalloys(UNSN08825,N08221,and

N06845)intheformofcold-workedandhot-finishedam-

3

lesspipeandtubeintendedforgeneralcorrosivervice.The

generalrequirementsforpipeandtubearecoveredinSpeci-

ficationB829.

1.2Thevaluesstatedininch-poundunitsaretoberegarded

asstandard.Thevaluesgiveninparenthesaremathematical

conversionstoSIunitsthatareprovidedforinformationonly

andarenotconsideredstandard.

1.3Thefollowingprecautionarycaveatpertainsonlytothe

testmethodsportion,Section

9,ofthisspecification:This

standarddoesnotpurporttoaddressallofthesafetyconcerns,

ifany,associatedwithitsu.Itistheresponsibilityoftheur

ofthisstandardtobecomefamiliarwithallhazardsincluding

thoidentifiedintheappropriateMaterialSafetyDataSheet

(MSDS)forthisproduct/materialasprovidedbythemanufac-

turer,toestablishappropriatesafetyandhealthpractices,and

determinetheapplicabilityofregulatorylimitationspriorto

u.

2.ReferencedDocuments

2.1ASTMStandards:

4

andNickelAlloysSeamlessPipeandTube

3.GeneralRequirement

3.1Materialfurnishedunderthisspecificationshallcon-

formtotheapplicablerequirementsofSpecificationB829

unlessotherwiprovidedherein.

4.OrderingInformation

4.1Itistheresponsibilityofthepurchartospecifyall

requirementsthatarenecessaryforthesafeandsatisfactory

performanceofmaterialorderedunderthisspecification.

Examplesofsuchrequirementsinclude,butarenotlimitedto,

thefollowing:

4.1.1AlloynameorUNSnumber,

4.1.2ASTMdesignation,

4.1.3Condition(e

AppendixX2),

4.1.4Finish(eAppendixX2),

4.1.5Dimensions:

4.1.5.1Tube—Specifyoutsidediameterandnominalor

minimumwall,

4.1.5.2Pipe—Specifystandardpipesizeandschedule,

4.1.5.3Length—Cuttolengthorrandom,

4.1.6Quantity—Feet(ormetres)ornumberofpieces,

4.1.7HydrostaticTestorNondestructiveElectricTest—

Specifytypeoftest(e

6.2).

4.1.8HydrostaticPressureRequirements—Specifytest

pressureifotherthanrequiredby9.1.1,

4.1.9Certification—Stateifcertificationisrequired,

4.1.10SamplesforProduct(Check)Analysis—State

whethersamplesforproduct(check)analysisshouldbefur-

nished(e5.2),

4.1.11PurcharInspection—Ifpurcharwishestowit-

nesstestsorinspectionofmaterialatplaceofmanufacture,the

purchaordermustsostateindicatingwhichtestsorinspec-

tionsaretobewitnesd,and

4.1.12Small-DiameterandLight-WallTube(Converter

Sizes)—SeeAppendixX1.

ThisspecificationisunderthejurisdictionofASTMCommitteeB02on

NonferrousMetalsandAlloysandisthedirectresponsibilityofSubcommittee

B02.07onRefinedNickelandCobaltandTheirAlloys.

CurrenteditionapprovedOct.1,2011.PublishedNovember2011.Originally

approvedin1964.Lastpreviouseditionapprovedin2009asB423-05(2009).

DOI:10.1520/B0423-11.

2

ForASMEBoilerandPressureVeslCodeapplicationserelatedspecifica-

tionSB-423inSectionIIofthatcode.

3

NewdesignationestablishedinaccordancewithPracticeE527andSAE

J1086,PracticeforNumberingMetalsandAlloys(UNS).

4

ForreferencedASTMstandards,visittheASTMwebsite,,or

contactASTMCustomerServiceatrvice@.ForAnnualBookofASTM

Standardsvolumeinformation,refertothestandard’sDocumentSummarypageon

theASTMwebsite.

1

*ASummaryofChangesctionappearsattheendofthisstandard.

Copyright©ASTMInternational,100BarrHarborDrive,POBoxC700,WestConshohocken,PA19428-2959,UnitedStates.

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B423–11

TABLE1ChemicalRequirements

A

ElementUNSN08825UNSN08221UNSN06845

Nickel38.0–46.039.0–46.044.0–50.0

Chromium19.5–23.520.0–22.020.0–25.0

Iron22.0min

Mangane1.01.00.5

Carbon0.050.0250.05

Copper1.5–3.01.5–3.02.0–4.0

Silicon0.50.50.5

Sulfur0.030.030.010

Aluminum0.20.2...

Titanium0.6–1.20.6–1.0...

Molybdenum2.5–3.55.0–6.55.0–7.0

Tungsten......2.0–5.0

A

BBB

22.0minremainder

Maximumunlessrangeorminimumisgiven.Whereellips(...)appearinthistable,thereisnorequirementandanalysisfortheelementneednotbedetermined

orreported.

B

Elementshallbedeterminedarithmeticallybydifference.

TABLE2MechanicalPropertiesofPipeandTube

AlloyConditionandSize

TensileStrength,0.2%Offt,min,2in.or50

min,ksi(MPa)ksi(MPa)mm(4D),

75(517)25(172)30UNSN08825hot-finishedannealed

85(586)35(241)30UNSN08825cold-workedannealed

AAA

YieldStrengthElongationin

min,%

UNSN08825hot-formingquality(hot-finishedorcold-drawn

UNSN08221cold-finished,annealed79(545)34(234)30

UNSN06845cold-finished,annealed100(690)40(276)30

A

annealed)

Hot-formingqualityisfurnishedtochemicalrequirementsandsurfaceinspectiononly.Nomechanicalpropertiesarerequired.

5.ChemicalComposition

5.1Thematerialshallconformtothecompositionlimits

specifiedinTable1.Onetestisrequiredforeachlotasdefined

inSpecificationB829.

5.2Ifaproduct(check)analysisisperformedbythe

purchar,thematerialshallconformtotheproduct(check)

analysisvariationsofSpecificationB829.

6.MechanicalPropertiesandOtherRequirements

6.1TensionTest—Thematerialshallconformtothetensile

propertiesspecifiedinTable2.Thesamplingandspecimen

preparationareascoveredinSpecificationB829.

6.1.1Tensilepropertiesformaterialspecifiedassmall-

diameterandlight-walltube(convertersizes)shallbeas

prescribedinTableX1.1.

6.2HydrostaticorNondestructiveElectricTest—Eachpipe

ortubeshallbesubjectedtoeitherthehydrostatictestorthe

nondestructiveelectrictest.Thetypeoftesttobeudshallbe

attheoptionofthemanufacturer,unlessotherwispecifiedin

thepurchaorder.

7.DimensionsandPermissibleVariations

7.1DiameterandWallThickness—Thepermissiblevaria-

tionsintheoutsidediameterandwallthicknessshallconform

tothepermissiblevariationsprescribedinTables3,4,and5of

Specification

B829.

7.2Permissiblevariationsformaterialspecifiedassmall-

diameterandlight-walltube(convertersize)shallconformto

thepermissiblevariationsprescribedin

TableX1.2.

8.NumberofTests

8.1ChemicalAnalysis—Onetestperlot.

8.2Tension—Onetestperlot.

8.3HydrostaticorNondestructiveElectricTest—Each

pieceineachlot.

9.TestMethods

9.1HydrostaticTest—Eachpipeortubewithanoutside

diameter⁄in.(3mm)andlargerandwithwallthicknessof

1

8

0.015in.(0.38mm)andovershallbetestedinaccordancewith

SpecificationB829.Theallowablefiberstress,formaterialin

theconditionfurnished,isasfollows:

UNSN08825hotfinished,annealed:16600psi(114MPa)

UNSN08825cold-worked,annealed:21200psi(146MPa)

UNSN08221coldfinished,annealed:19700psi(138MPa)

9.1.1Whensoagreeduponbetweenthemanufacturerand

purchar,pipeortubemaybetestedto1

1

⁄timesthe

2

allowablefiberstressgivenin9.1.

9.1.2Ifanypipeortubeshowsleaksduringhydrostatic

testing,itshallberejected.

9.2NondestructiveElectricTest—Eachpipeortubeshallbe

examinedwithanondestructiveelectrictestinaccordancewith

SpecificationB829.

10.Keywords

10.1N08221;N08825;N06845;amlesspipe;amless

tube

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B423–11

APPENDIXES

(NonmandatoryInformation)

X1.CONVERTERSIZES

X1.1Small-diameterandlight-walltubeinoutsidediam-shouldbeconsultedastothevariousoutsidediametersand

eters1⁄in.(31.8mm)andundermaybefurnishedinthewallthicknessthatmaybefurnished.Materialwillhavea

1

4

conditionslistedinTableX1.1whensospecified.Thematerialrightfinish.Suchmaterialshallconformtotheapplicable

isfurnishedinalimitedrangeofsizesandthemanufacturerrequirementsinTableX1.1andTableX1.2.

TABLEX1.1MechanicalPropertiesofSmall-DiameterandLight-WallTubing(ConverterSizes)

A

ConditionTensileStrength,ksi(MPa)

Annealed85–115(586–793)35(241)30

BC

Half-hard105(724)min75(517)15

D

Full-hard

E

A

B

125(862)min100(689)5

YieldStrength(0.2%offt)min,Elongationin2in.or50mm,

ksi(MPa)min,%

Notapplicabletooutsidediametersunder⁄in.(3.2mm)andwallthicknessunder0.015in.(0.381mm).

1

8

Thisconditionissometimesdesignatedas“No.1Temper.”

C

Theminimumtensilestrengthvalueappliesonlytotubinginstraightlengths.

D

Thisconditionissometimesdesignatedas“No.2Temper.”

E

Thisconditionissometimesdesignatedas“No.3Temper.”

TABLEX1.2PermissibleVariationsforSmall-DiameterandLight-WallTube(ConverterSizes)

ABCDEFG

SpecifiedOutsideDiameter,in.

(mm)

Under⁄(2.4)0.002(0.05)000.002(0.05)1010

3

32

⁄to⁄(2.4to4.8),excl0.003(0.08)000.003(0.08)1010

33

1632

31

⁄to⁄(4.8to12.7),excl0.004(0.10)000.004(0.10)1010

162

11

⁄to1⁄(12.7to31.8),incl0.005(0.13)000.005(0.13)1010

24

OutsideDiameter,in.(mm)InsideDiameter,in.(mm)WallThickness,%

+−+−+−

Ovality,NormalWallTube—As-Drawn(No.2and3)Tempers—Ovalitywillbeheldwithintheoutsidediametertolerancesshowninthetable.

Annealed(No.1)Temper—Ovalitywillbeheldwithin2%ofthetheoreticalaverageoutsidediameter.

B

Ovality,LightWallTube—As-Drawn(No.2and3)Tempers—Uptobutnotincluding1⁄in.(31.8mm)inoutsidediameter,ovalitywillbeheldwithin2%ofthe

1

4

theoreticalaverageoutsidediameter.

Annealed(No.1)Temper—Ovalitywillbeheldwithin3%ofthetheoreticalaverageoutsidediameter.

C

WallTolerances,LightWallTube—Theplusandminuswalltoleranceshowninthetableshallapplydowntoandincluding0.005in.(0.13mm)inwallthickness.For

wallthicknesslessthan0.005in.(0.13mm),thetoleranceshallbe60.0005in.(0.013mm).

D

RandomLengths:

Wherenominalrandomlengthsontubing⁄in.(3.2mm)andlargerinoutsidediameterarespecified,alengthtoleranceof63⁄ft(1.06m)appliestothenominallength.

11

82

Thisisatotalspreadof7ft(2.10m).

Randomlengthsinsizes⁄in.(3.2mm)andlargerinoutsidediametershallbesubjecttoalengthrangeof5to24ft(1.50to7.30m).Longrandomlengthsaresubject

1

8

toarangeof15to22ft(4.57to6.70m).

Randomlengthsinsizesupto,butnotincluding,⁄in.(3.2mm)inoutsidediameterandfragilelight-walltubesoverthisoutsidediameteraresubjecttothelengthrange

1

8

of1to15ft(0.30to4.57m).

E

CutLengths—TolerancesoncutlengthsshallbeinaccordancewithTableX1.3.

F

Straightness—Roundtubingissubjecttoastraightnesstoleranceofonepartin600[equivalenttoadepthofarcof0.030in.(0.76mm)inany3ft(0.91m)onlength].

G

Whenspecified,thetolerancespreadsofthistablemaybeappliedasdesired.However,whennotspecified,thetolerancesinthistablewillapply.Itshouldbenoted

thatinsidediametertolerancesarebadupontheoutsidediameterrange.

A

TABLEX1.3TolerancesonCutLengthsofLight-WallTube

Length,ft(m)TubeSize,in.(mm)

Under1(0.30)upto1.250(31.8),incl⁄0(0)(0.8)

1to4(0.30to1.22),inclupto1.250(31.8),incl⁄0(0)(1.6)

Over4to10(1.22to3.0),inclupto1.250(31.8),incl

Over10(3.0)upto1.250(31.8),incl⁄0(0)(4.8)

PermissibleVariations,in.(mm)

OverUnder

3

⁄0(0)(2.4)

32

3

16

1

32

1

16

3

B423–11

X2.CONDITIONSANDFINISHESNORMALLYSUPPLIED

X2.1Scope

X2.1.1Thisappendixliststheconditionsandfinishesin

whichpipeandtube(otherthanconvertersizes)arenormally

supplied.Thearesubjecttochange,andthemanufacturer

shouldbeconsultedforthelatestinformationavailable.

X2.2Cold-WorkedTubeandPipe

X2.2.1Cold-Worked,Annealed,withGroundOutside

Diameter—Theinsidediametermayhaveabrightfinishwhen

materialisannealedinaprotectiveatmosphere;otherwi,the

insidediameterissupplieddescaledasnecessary.Itisavailable

insizes⁄to4in.(12.7to102mm),inclusive,inoutside

1

2

diameterinbothnormalandheavy-walltube,andpipesizes,

allschedules,ofcorrespondingoutside-diameterdimensions.

X2.2.2Cold-Worked,Annealed,andPickled(Not

Ground)—Outsideandinsidediameterwillhavedull,matte

(pickled)surfaces.Itisavailableinsizes⁄to6⁄in.(12.7to

15

28

168mm),inclusive,inoutsidediameterinbothnormaland

heavy-walltube,andpipesizes,allschedules,ofcorrespond-

ingoutside-diameterdimensions.

X2.3Hot-WorkedTube

X2.3.1Hot-Worked-Annealed(NotPickled)Tube—Hasan

oxidesurfaceresultingfromthehot-workingoperation.In-

tendedgenerallyformachinedpartswheretheoxidesurface

willberemoved.

X2.3.2Hot-Worked-Annealed(Pickled)Tube—Hastheox-

idesurfaceremovedonbothoutsideandinsidediametersby

pickling.Surfacemaybespotgroundforremovalofminor

surfaceimperfectionsatthemanufacturer’soption.

X2.3.3Hot-Worked-Annealed(MachinedOutsideandIn-

sideDiameters)Tubes—Theoutsideandinsidediameter

surfacesaremachinedtospecifieddimensions.Minorsurface

imperfectionsmaybespotgroundforremoval,atthemanu-

facturer’soption.

SUMMARYOFCHANGES

CommitteeB02hasidentifiedthelocationoflectedchangestothisstandardsincethelastissue

(B423-05(2009))thatmayimpacttheuofthisstandard.(ApprovedOctober1,2011.)

(1)RevidTitle,subction1.1,Section10,Table1,and(2)RevidTable1toaddfootnotesAandB,andtoadd

Table2toaddUNSN06845.footnoteBtotheironcontentsofN08825andN08221.

ASTMInternationaltakesnopositionrespectingthevalidityofanypatentrightsasrtedinconnectionwithanyitemmentioned

inthisstandard.Ursofthisstandardareexpresslyadvidthatdeterminationofthevalidityofanysuchpatentrights,andtherisk

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Thisstandardissubjecttorevisionatanytimebytheresponsibletechnicalcommitteeandmustbereviewedeveryfiveyearsand

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