ASTM A747

1.1Thisspecificationcoversiron-chromium-nickel-copper

corrosion-resistantsteelcastings,capableofbeingstrength-

enedbyprecipitationhardeningheattreatment.

1.2Thesecastingsmaybeusedinservicesrequiringcorro-

sionresistanceandhighstrengthsattemperaturesupto600°F

[315°C].Theymaybemachinedinthesolution-annealed

conditionandsubsequentlyprecipitationhardenedtothede-

siredhigh-strengthmechanicalpropertiesspecifiedinTable

S14.1withlittledangerofcrackingordistortion.

1.3Thematerialisnotintendedforuseinthesolution-

annealedcondition.

N

OTE

1—Iftheserviceenvironmentinwhichthematerialistobeused

isconsideredconducivetostress-corrosioncracking,precipitationhard-

eningshouldbeperformedatatemperaturethatwillminimizethe

susceptibilityofthematerialtothistypeofattack.

1.4Thevaluesstatedineitherinch-poundunitsorSIunits

thetext,the

uesstatedineach

systemarenotexactequivalents;therefore,eachsystemmust

ingvaluesfromthe

twosystemsmayresultinnonconformancewiththespecifi-

cation.

ncedDocuments

2.1ASTMStandards:

2

A370TestMethodsandDefinitionsforMechanicalTesting

ofSteelProducts

A732/A732MSpecificationforCastings,Investment,Car-

bonandLowAlloySteelforGeneralApplication,and

CobaltAlloyforHighStrengthatElevatedTemperatures

A781/A781MSpecificationforCastings,SteelandAlloy,

CommonRequirements,forGeneralIndustrialUse

--````,,,```````,,,,`,,`,`,,``,-`-`,,`,,`,`,,`---

Designation:A747/A747M–04

StandardSpecificationfor

SteelCastings,Stainless,PrecipitationHardening

1

ThisstandardisissuedunderthefixeddesignationA747/A747M;thenumberimmediatelyfollowingthedesignationindicatestheyear

oforiginaladoptionor,inthecaseofrevision,rinparenthesesindicatestheyearoflastreapproval.

Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.

E38MethodsforChemicalAnalysisofNickel-Chromium

andNickel-Chromium-IronAlloys

3

E353TestMethodsforChemicalAnalysisofStainless,

Heat-Resisting,Maraging,andOtherSimilarChromium-

Nickel-IronAlloys

2.2ASMEStandard:

4

ASMEBoilerandPressureVesselCode,Supplementary

RequirementsS6,S14,andS27

lConditionsforDelivery

3.1Materialfurnishedtothisspecificationshallbein

accordancewiththerequirementsofSpecificationA781/

A781M,includinganysupplementaryrequirementsthatare

etocomplywiththe

generalrequirementsofSpecificationA781/A781Mconsti-

tutesnonconformancewiththisspecifiofcon-

flictbetweentherequirementsofthisspecificationandSpeci-

ficationA781/A781M,thisspecificationshallprevail.

ngInformation

4.1Ordersformaterialtothisspecificationshouldinclude

thefollowing:

4.1.1Specificationnumberandgrade(Table1),

4.1.2Heattreatmentcondition(SA,H900,andsoforth),

Table2,

4.1.3Drawingorpattern,

4.1.4Optionsinthespecification,ifany,inaccordancewith

5.2,6.3,andSection7,and

4.1.5Supplementaryrequirements,ifany,includingthe

standardsofacceptance.

4.1.6Noticewhenthecastingsaretobeusedinequipment

coveredbytheASMEBoilerandPressureVesselCode,

SupplementaryRequirementsS6,S14,andS27aremandatory

andmustbespecifiedinthepurchaseorder.

alsandManufacture

5.1Thesteelshallbemadebytheelectricfurnaceprocess

withorwithoutseparaterefiningsuchasargon-oxygendecar-

burization(AOD).

Withdrawn.

AvailablefromAmericanSocietyofMechanicalEngineers(ASME),ASME

InternationalHeadquarters,ThreeParkAve.,NewYork,NY10016-5990.

4

3

ThisspecificationisunderthejurisdictionofASTMCommitteeA01onSteel,

StainlessSteelandRelatedAlloysandisthedirectresponsibilityofSubcommittee

A01.18onCastings.

CurrenteditionapprovedSept.1,ally

eviouseditionapprovedin1999asA747/A747M–99.

2

ForreferencedASTMstandards,visittheASTMwebsite,,or

contactASTMCustomerServiceatservice@ualBookofASTM

Standardsvolumeinformation,refertothestandard’sDocumentSummarypageon

theASTMwebsite.

1

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

Copyright ASTM International

Reproduced by IHS under license with ASTM

1

Document provided by IHS Licensee=Fluor Corp no FPPPV per administrator /use

new u/2110503106, 10/21/2004 00:24:01 MDT Questions or comments about this

message: please call the Document Policy Group at 303-397-2295.

TABLE1ChemicalRequirements

A

GradeCB7Cu-1CB7Cu-2

UNSJ92180J92110

Type17-415-5

Carbon0.070.07

Manganese0.700.70

Phosphorus0.0350.035

Sulfur0.030.03

Silicon1.001.00

Chromium15.50–17.7014.0–15.50

Nickel3.60–4.604.50–5.50

Copper2.50–3.202.50–3.20

Columbium0.15–0.35

B

0.15–0.35

B

Nitrogen

C

0.050.05

A

Limitsarepercentmaximumunlessshownasarangeorstatedotherwise.

B

eH900conditionisordered,theminimumcolumbium

contentshallnotapply.

C

Tobedeterminedandreportedwhenspecifiedbytheorderorcontract.

TABLE2PrecipitationHardeningHeatTreatment

A

,

B

ConditionPH

C

Temperature,°F[°C]Time,handminCoolingTreatment

SANotprecipitationhardened(see5.2.3)

H900900[480]1.5aircool

H925925[495]1.5aircool

H10251025[550]4.0aircool

H10751075[580]4.0aircool

H11001100[595]4.0aircool

H11501150[620]4.0aircool

H1150M1400[760]2.0aircool

1150[620]4.0aircool

H1150DBL1150[620]4.0aircool

1150[620]4.0aircool

A

Thefurnaceandcontrolsusedshallbecalibratedandcapableofuniformityof

heatinginordertoensureconsistentresults.

B

SeeNote1.

C

625°F[15°C].

5.2HeatTreatment—Castingsmaybegivenahomogeni-

zationheattreatmentinaccordancewith5.2.1attheproducer’s

optionorwhenspecifiedbythepurchaser(seeS26)priorto

tings,whetherhomogenizedor

not,shallbegivenasolutiontreatmentinaccordancewith

5.2.2andunlessorderedinthesolution-annealedcondition

shallbeprecipitationhardenedtotheorderedcondition(Table

2).

5.2.1Homogenizationheattreatmentshallconsistofheat-

ingthecastingsandtestmaterialtoaminimumof1900°F

[1040°C],holdingforaminimumof1

1

⁄

2

h,andcoolingto

below90°F[30°C].

5.2.2Solutionannealingheattreatmentshallconsistof

heatingthecastingsandtestmaterialto1925°F650°F

[1050°C630°C],holdingthe30min/in.[1.2min/mm]of

sectionbutnotlessthan30min,andcoolingtobelow90°F

[30°C].

5.2.3Temperatureusedforprecipitationhardeningshallbe

maintainedwithintherangeof625°F[615°C]ofthatlistedin

Table2fortheheat-treatmentconditionordered.(SeeNote1)

5.2.4Whentheorderofcontractspecifiesaminimum

columbiumcontent,theminimumprecipitationhardening

temperatureshallbe925°F[495°C].

alComposition

6.1Thesteelshallbeinaccordancewiththerequirements

astochemicalcompositionprescribedinTable1.

6.2WhentheH900conditionisordered,theminimum

columbiumcontent(Table1)com-

mendedthatcolumbiumotherthanthatinrevertmaterialnot

beadded.

6.3MethodsofAnalysis—Analyticalproceduresfornitro-

genanalysisarenotincludedinMethodsE38orTestMethods

E353,soifthecontractororderspecifiesthatthenitrogen

contentistobereported,themethodofanalysisshallbeagreed

uponbypurchaserandproducer.

byWelding

7.1Repairsshallbemadeonlyinoneofthefollowing

conditions:homogenized,solutionannealed,H1100,H1150,

H1150M,H1150DBL,orstressrelievedat1150°F625°F

[620°C615°C]foraminimumof4h.

7.2Castingsweldedinoneoftheagedconditionsnotedin

7.1shallbepostweldheattreatedbythesameagingtreatment

usedpriortowelding,or,wherenecessarytomeetmechanical

propertyrequirements,shallbesolutionannealedandaged

gsweldedinthestress-relievedcondition

shallreceivethespecificationheattreatmentafterwelding.

ds

8.1precipitationhardeningstainlesssteel;stainlesssteel;

steelcastings

SUPPLEMENTARYREQUIREMENTS

Alistofstandardizedsupplementaryrequirementsforuseattheoptionofthepurchaserisdescribed

inSpecificationA781/hatareconsideredsuitableforusewiththisspecificationare

onalsupplementaryrequirementssuitableforusewiththis

specifioreofthesupplementary

requirementsindicatedbelowmaybeincludedinthepurchaser’included,

asupplementaryrequirementshallhavethesameforceasifitwereinthebodyofthespecification.

Supplementaryrequirementsdetailsnotfullydescribedshallbeagreeduponbetweenthepurchaser

andthesupplier,butshallnotnegateanyoftherequirementsinthebodyofthespecification.

icParticleExamination

N

OTE

—WhenCB7CU-1alloyisinspectedbymagneticparticle

method,falseindicationsmaybecausedbyferritestingersortracesof

penetrantmethodsmaybe

usedtoconfirmthepresenceorabsenceofadiscontinuitywhensuch

indicationsarenoted.

S13.3ThetestshallbeconductedinaccordancewithTest

MethodsandDefinitionsA370.

nTest

S14.1Tensilepropertiesshallbedeterminedfrommaterial

fromwhichthetestspecimen

istakenshallbeheattreatedwithproductioncastingstothe

sameprocedureasthecastingsitrepresents,unlessthecastings

areorderedinthesolution-annealedcondition(5.2.2).The

resultsshallbeinaccordancewiththerequirementsspecified

inTableS14.1andshallbereportedtothepurchaserorhis

representative.

S14.2Whenthecontractororderspecifiesthatthecastings

aretobefurnishedinthesolution-annealedcondition,the

manufacturershalltestspecimensrepresentingthecastingsthat

havebeengiventheprecipitationheattreatmentspecifiedby

thepurchaserinaccordancewithTable2.

S14.3Testcouponsandtestsshallbemadeinaccordance

withTestMethodsandDefiossible,the

standard2-in.[50-mm]gagelengthspecimensshallbeused,

rd

ngth

bsizespecimensareused,the

raphicExamination

PenetrantExamination

ationofWeldPreparation

fication

ssTest

S13.1Brinellhardnesstestshallbemadefromeachheat-

ultsshallbeinaccordance

withtherequirementsinTableS14.1andshallbereportedto

thepurchaserorhisrepresentative.

S13.2Thetestmaybemadeontheendofthetension

specimenunlesstheorderrequiresittobemadeonacasting,

inwhichcase,wherepossible,thetestshallbemadeonaboss

orextensionlocatedonthecastingsuitablefortestinginthe

Brinelltester.

TABLES14.1MechanicalProperties

YieldStrength

0.2%Offset,min,

ksi[MPa]

145[1000]

150[1035]

140[965]

115[795]

110[760]

97[670]

...

...

145[1000]

150[1035]

140[965]

115[795]

110[760]

97[670]

...

...

Elongationin2

in.[51mm],

min,%

A

5

5

9

9

9

10

...

...

5

5

9

9

9

10

...

...

Alloy

Type

CB7Cu-1

PHHeat

Treatment

H900

H925

H1025

H1075

H1100

H1150

H1150M

H1150DBL

Hardness,

HB

375min

375min

311min

277min

269min

269min

310max

310max

375min

375min

311min

277min

269min

269min

310max

310max

TensileStrength,

ksi[MPa]

170[1170]

175[1205]

150[1035]

145[1000]

135[930]

125[860]

...

...

170[1170]

175[1205]

150[1035]

145[1000]

135[930]

125[860]

...

...

CB7Cu-2H900

H925

H1025

H1075

H1100

H1150

H1150M

H1150DBL

Ifsub-sizetensiontestbarsareused,thegagelength/gagediameterratiomustbe4to1toassureelongationvaluescomparablewiththoseofthestandardtest

specimen.

A

investmentcastingsareordered,thespecimensshallbepre-

paredinaccordancewithS3.2ofSpecificationA732/A732M.

S14.4Ifanytestspecimenshowsdefectivemachiningor

developsflaws,itmaybediscardedandanotherspecimen

tshallbeallowedifthe

percentageelongationofanytensiontestspecimenislessthan

thatspecifiedinTableS14.1,orifanypartofthefractureis

morethan

3

⁄

4

in.[19mm]fromthecenterofastandard2-in.

[50-mm]gagelengthestablishedbyscribescratchesonthe

untestedspecimen.

nizationHeatTreatment

S26.1Thehomogenizationheattreatmentshallconsistof

heatingthecastingsandtestmaterialtoaminimumof1900°F

[1040°C],holdingforaminimumof1

1

⁄

2

h,andcoolingto

below90°F[30°C].

tMarking

S27.1Themanufacturer’snameoridentificationmarkand

thepatternnumbershallbecastorstampedonallcastings

exceptthoseofsuchsmallsizeastomakesuchmarking

mizesmalldefectscausedbydislodged

particlesofmoldingsand,thenumberofcastidentification

rtherspecified,theheat

numbersshallbemarkedonindividualcastings.

S27.2Whenthecastingsaretoosmalltomarkindividually,

asymboltraceabletothelotshallbeplacedonthecastingsand

therequiredidentificationthenplacedonatagaffixedtothe

containerinwhichthesecastingsareshipped.

ASTMInternationaltakesnopositionrespectingthevalidityofanypatentrightsassertedinconnectionwithanyitemmentioned

fthisstandardareexpresslyadvisedthatdeterminationofthevalidityofanysuchpatentrights,andtherisk

ofinfringementofsuchrights,areentirelytheirownresponsibility.

Thisstandardissubjecttorevisionatanytimebytheresponsibletechnicalcommitteeandmustbereviewedeveryfiveyearsand

ifnotrevised,mmentsareinvitedeitherforrevisionofthisstandardorforadditionalstandards

mmentswillreceivecarefulconsiderationatameetingofthe

responsibletechnicalcommittee,eelthatyourcommentshavenotreceivedafairhearingyoushould

makeyourviewsknowntotheASTMCommitteeonStandards,attheaddressshownbelow.

ThisstandardiscopyrightedbyASTMInternational,100BarrHarborDrive,POBoxC700,WestConshohocken,PA19428-2959,

dualreprints(singleormultiplecopies)ofthisstandardmaybeobtainedbycontactingASTMattheabove

addressorat610-832-9585(phone),610-832-9555(fax),orservice@(e-mail);orthroughtheASTMwebsite

().