AS 1444-1996

AS1444—1996AustralianStandardWroughtalloysteels—Standard,hardenability(H)seriesandhardenedandtemperedtodesignatedmechanicalpropertiesThisAustralianStandardwaspreparedbyCommitteeMT/1,IronandSteel.ItwasapprovedonbehalfoftheCouncilofStandardsAustraliaon11June1996andpublishedon5September1996.ThefollowinginterestsarerepresentedonCommitteeMT/1:AustralianChamberofCommerceandIndustryAustralianChamberofManufacturesAustralianFoundryInstituteAustralianInstituteofSteelConstructionBureauofSteelManufacturersofAustraliaInstituteofMetalsandMaterialsAustralasiaMetalTradesIndustryAssociationofAustraliaRailwaysofAustraliaSocietyofAutomotiveEngineers,AustralasiaAdditionalinterestsparticipatinginpreparationofStandard:RodandbarmanufacturersReviewofAustralianStandards.Tokeepabreastofprogressinindustry,AustralianStandardsaresubjecttoperiodicreviewandarekeptuptodatebytheissueofamendmentsorneweditionsasnecessary.ItisimportantthereforethatStandardsusersensurethattheyareinpossessionofthelatestedition,andanyamendmentsthereto.FulldetailsofallAustralianStandardsandrelatedpublicationswillbefoundintheStandardsAustraliaCatalogueofPublications;thisinformationissupplementedeachmonthbythemagazine‘TheAustralianStandard’,whichsubscribingmembersreceive,andwhichgivesdetailsofnewpublications,neweditionsandamendments,andofwithdrawnStandards.SuggestionsforimprovementstoAustralianStandards,addressedtotheheadofficeofStandardsAustralia,arewelcomed.NotificationofanyinaccuracyorambiguityfoundinanAustralianStandardshouldbemadewithoutdelayinorderthatthemattermaybeinvestigatedandappropriateactiontaken.ThisStandardwasissuedindraftformforcommentasDR95247.OriginatedaspartofASG18—1966,ASG19—1966andASG20—1966.PreviouseditionsAS1444—1986andAS2506—1990.AS1444—1986andAS2506—1990revised,amalgamatedanddesignatedAS1444—1996.AS1444—1996AustralianStandardWroughtalloysteels—Standard,hardenability(H)seriesandhardenedandtemperedtodesignatedmechanicalpropertiesPUBLISHEDBYSTANDARDSAUSTRALIA(STANDARDSASSOCIATIONOFAUSTRALIA)1THECRESCENT,HOMEBUSH,NSW2140ISBN0733706630AS1444—19962PREFACEThisStandardwaspreparedbytheJointStandardsAustralia/StandardsNewZealandCommitteeMT/1,IronandSteeltosupersedeAS1444—1986,Wroughtalloysteels—Standardandhardenability(H)seriesandAS2506—1990,Wroughtalloysteels—Hardenedandtemperedtodesignatedmechanicalproperties.ThetwoStandardshavebeencombinedbecauseofthesimilarityoftechnicalcontent,aneedtorationalizethestandardizationofalloysteelsandaneedforuniformityofdimensionaltolerancesofheat-treatablesteels.ThisStandardistheresultofaconsensusamongAustralianandNewZealandrepresentativesontheJointCommitteetoproduceitasanAustralianStandard.TheobjectiveofthisStandardistospecifyrequirementsforwroughtalloysteelsforgeneralengineeringpurposessuppliedintheformofhot-rolledorcold-finishedbarsformachining,forgings,andbars,blooms,billetsandslabsforforgings.Steelsmaybesuppliedtochemicalcompositiononly(standardseries),tochemicalcompositionandsubjecttoend-quenchhardenabilityrequirements(Hseries)or,tochemicalcompositionandmechanicalproperties.Inthisrevisionanumberofgradesofboththestandardsteeltypesandthe‘H’typesspecifiedinthe1986editionofAS1444havebeendeletedandnewgradeshavebeenadded.Thedimensionaltolerancesandtherequirementsforsurfaceconditionforhot-rolledbarsalignwiththoseinAS1442,Carbonsteelsandcarbon-manganesesteels—Hot-rolledbarsandsemifinishedproducts,andAS1443,Carbonsteelsandcarbon-manganesesteels—Cold-finishedbars.Atablehasbeenaddedtocoverthemechanicalpropertiesofcold-finishedbarsthathavebeencolddrawnorcoldrolledafterheattreatment.DuringthepreparationofthisStandard,cognizancewastakenoftheinternationalStandardISO683-1,Heat-treatablesteels,alloysteelsandfree-cuttingsteels,Part1:Direct-hardeningunalloyedandlow-alloyedwroughtsteelinformofdifferentblackproducts.ThealloydesignationsusedinthisStandardalignwiththoseusedinAmericanspecificationswhichhavefoundworldwideacceptanceformanyyears.ThealloydesignationsincludedinISO683-1andBS970-3,Specificationforwroughtsteelsformechanicalandalliedengineeringpurposes,Part3:Brightbarsforengineeringpurposes,arerarelyusedinAustraliaandconsequentlywerenotacceptabletoCommitteeMT/1whichfavourstheuniversallyknownfour-digitsystem.Theterms‘normative’and‘informative’havebeenusedinthisStandardtodefinetheapplicationoftheappendixtowhichtheyapply.A‘normative’appendixisanintegralpartofaStandard,whereasan‘informative’appendixisonlyforinformationandguidance.CopyrightSTANDARDSAUSTRALIAUsersofStandardsareremindedthatcopyrightsubsistsinallStandardsAustraliapublicationsandsoftware.ExceptwheretheCopyrightActallowsandexceptwhereprovidedforbelownopublicationsorsoftwareproducedbyStandardsAustraliamaybereproduced,storedinaretrievalsysteminanyformortransmittedbyanymeanswithoutpriorpermissioninwritingfromStandardsAustralia.Permissionmaybeconditionalonanappropriateroyaltypayment.RequestsforpermissionandinformationoncommercialsoftwareroyaltiesshouldbedirectedtotheheadofficeofStandardsAustralia.StandardsAustraliawillpermitupto10percentofthetechnicalcontentpagesofaStanda