ASTM A897 - Standard Specification for Austempered Ductile Iron Castings球墨铸铁等温淬火标准

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1、Designation:A897/A897M06StandardSpecificationfor1AustemperedDuctileIronCastingsThisstandardisissuedunderthefixeddesignationA897/A897M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatesthe

2、yearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.1.ScopeA732/A732MSpecificationforCastings,Investment,Car-1.1ThisspecificationcoversductileironcastingsthatarebonandLowAlloySteelforGeneralApplication,andsubsequentlyheattreatedbyanaustem

3、peringprocessasCobaltAlloyforHighStrengthatElevatedTemperaturesdefinedin10.1.A834SpecificationforCommonRequirementsforIron1.2TheapplicationoftheaustemperingheattreatmentCastingsforGeneralIndustrialUseextendstherangeofpropertiesachievableinductileironE8TestMethodsforTensionTestingofMetall

4、icMaterialscastings.E10TestMethodforBrinellHardnessofMetallicMateri-1.3Noprecisequantitativerelationshipcanbestatedbe-alstweenthepropertiesoftheironinvariouslocationsofthesameE23TestMethodsforNotchedBarImpactTestingofcastingorbetweenthepropertiesofcastingsandthoseofatestMetallicMateria

5、lsspecimencastfromthesameiron(seeAppendixX1).How-2.2MilitaryStandard:MIL-STD-129MilitaryMarkingforShipmentandStorage3ever,austemperingheattreatmentwilltendtodiminishanydifferencesinmechanicalproperties.3.OrderingInformation1.4Theproductionofcastings,machining(ifrequired),andtheaustempe

6、ringheattreatmentsmaybeperformedbydiffer-3.1Ordersformaterialtothisspecificationshallincludetheentmanufacturers,ascoveredinSection15.Thepurchaserfollowinginformation:shouldestablishbycontractagreement,atthetimeofordering,3.1.1ASTMdesignation,withyearofissue,theresponsibilityofthevarious

7、partiesformeetingthe3.1.2Gradeofaustemperedductileironrequired(seeTablespecificationrequirements.1andSections6and7),1.5Thevaluesstatedineitherinch-poundorSIunitsareto3.1.3Chemicalcompositionrequirements,ifany(seeSec-beregardedseparatelyasstandard.Withinthetext,theSIunitstion4),areshow