ASME中國(guó)制造-ASTM A842-11a Standard Specification for Compacted Graphite Iron Ca

1.Scope

1.1Thisspeci?cationcoverscastingsmadeofcompactedgraphiteiron,whichisdescribedascastironwiththegraphiteincompacted(vermiform)shapesandessentiallyfreeof?akegraphiteinthebulkofthecasting.

1.2Noprecisequantitativerelationshipcanbestatedbe-tweenthepropertiesofironinthevariouslocationsofthesamecastingandthoseofatestbarcastfromthesameiron(seeAppendixX1).

1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.

1.3.1Exception—Theinch-poundunitsinFigs.1-3andarestandard.SIunitsareaddedforinformationonly.

1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments

2.1ASTMStandards:2

A247TestMethodforEvaluatingtheMicrostructureofGraphiteinIronCastings

E8/E8MTestMethodsforTensionTestingofMetallicMa-terials

2.2FederalStandard:3

FederalStandardNo.123MarkingforShipment(CivilAgencies)

2.3AmericanNationalStandard:4

MIL-STD-129MarkingforShipmentandStorage3.OrderingInformation

3.1Ordersformaterialtothisspeci?cationshallincludethefollowinginformation:

3.1.1ASTMdesignationandyearofissue,

3.1.2Gradeofcompactedgraphiteironrequiredasidenti-?edinTable1,

3.1.3Specialpropertiesifrequired,(see4.1and10.1),3.1.4Ifsamplesotherthanthoseidenti?edinSection9arerequired,

3.1.5Certi?cationifsodesignatedbythepurchaser,and3.1.6Specialpreparationfordeliveryifrequired.4.ChemicalComposition

4.1Itistheintentofthisspeci?cationtosubordinatechemicalcompositiontomechanicalproperties;however,anychemicalrequirementmaybespeci?edbyagreementbetweenthemanufacturerandthepurchaser.5.Requirements

5.1Compactedgraphitecastironshallbeexaminedmetal-lographicallyfortheacceptablegraphiteformation.Nonde-structivetestingsuchasultrasonicvelocityorresonancefrequencymayalsobeusedtodeterminethegraphitenodu-larity.However,incasesofdispute,themetallographicexami-nationshallprevail.

5.2Themetallographicexaminationshallbeperformedonasamplesectionedfromthecasting,onaseparatelycasttestcoupon,asshowninFig.1,oronatestlugfromacasting.Thelocationonthecastingfromwhichthemetallographicspeci-menissectionedshallbeagreedbythemanufacturerandthepurchaser.Inthecaseofatestcouponortestlug,thespecimenshallrepresentthelastmetalfromthetreatedbatch.Thecastinglugdimensionandlocationshallbeagreedbymanu-facturerandpurchaser.

5.3Whencastingsareproducedtothisspeci?cationbytreatingtheironinthemoldforgraphiteformcontrol,themanufacturermayuseseparatelycasttestcouponsorcuttest

AvailablefromAmericanNationalStandardsInstitute(ANSI),25W.43rdSt.,4thFloor,NewYork,NY10036,http://www.ansi.org.

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Thisspeci?cationisunderthejurisdictionofASTMCommitteeA04onIronCastingsandisthedirectresponsibilityofSubcommitteeA04.02onMalleableandDuctileIronCastings.

CurrenteditionapprovedMay1,2011.PublishedJune2011.Originallyapprovedin1985.Lastpreviouseditionapprovedin2011asA842–11.DOI:10.1520/A0842-11A.2

ForreferencedASTMstandards,visittheASTMwebsite,www.astm.org,orcontactASTMCustomerServiceatservice@astm.org.ForAnnualBookofASTMStandardsvolumeinformation,refertothestandard’sDocumentSummarypageontheASTMwebsite.3

AvailablefromStandardizationDocumentsOrderDesk,DODSSP,Bldg.4,SectionD,700RobbinsAve.,Philadelphia,PA19111-5098,http://dodssp.daps.dla.mil.

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

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