Designation:A897/A897M−16StandardSpecificationforAustemperedDuctileIronCastings1ThisstandardisissuedunderthefixeddesignationA897/A897M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecificationcoversductileironcastingsthataresubsequentlyheattreatedbyanaustemperingprocessasdefinedin9.1.1.2Theapplicationoftheaustemperingheattreatmentextendstherangeofpropertiesachievableinductileironcastings.1.3Noprecisequantitativerelationshipcanbestatedbe-tweenthepropertiesoftheironinvariouslocationsofthesamecastingorbetweenthepropertiesofcastingsandthoseofatestspecimencastfromthesameiron(seeAppendixX1).However,austemperingheattreatmentwilltendtodiminishanydifferencesinmechanicalproperties.1.4Theproductionofcastings,machining(ifrequired),andtheaustemperingheattreatmentsmaybeperformedbydiffer-entmanufacturers,ascoveredinSection13.Thepurchasershouldestablishbycontractagreement,atthetimeofordering,theresponsibilityofthevariouspartiesformeetingthespecificationrequirements.1.5ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.5.1Exception—Withinthetext,theSIunitsareshowninbrackets.2.ReferencedDocuments2.1ASTMStandards:2A247TestMethodforEvaluatingtheMicrostructureofGraphiteinIronCastingsA370TestMethodsandDefinitionsforMechanicalTestingofSteelProductsA732/A732MSpecificationforCastings,Investment,Car-bonandLowAlloySteelforGeneralApplication,andCobaltAlloyforHighStrengthatElevatedTemperaturesA834SpecificationforCommonRequirementsforIronCastingsforGeneralIndustrialUseE8TestMethodsforTensionTestingofMetallicMaterialsE10TestMethodforBrinellHardnessofMetallic...
