AS 1817-1-2003 Metallic materials—Vickers hardness

AS1817.1—2003iAS1817.1AustralianStandardTMMetallicmaterials—VickershardnesstestMethod1:Testmethod(ISO6507-1:1997,MOD)PREFACEThisStandardwaspreparedbyStandardsAustraliaCommitteeMT-006,MechanicalTestingofMetalstosupersede(inpart)AS1817—1991,Metallicmaterials—VickershardnesstestThisStandardisanadoptionwithnationalmodificationsandisreproducedfromISO6507-1:1997,Metallicmaterials—Vickershardnesstest,Part1:Testmethod.VariationstotheISOtextforAustraliaaresetoutinAppendixZZ.ChangestotheISOtextareindicatedbyamarginalbar.ThisStandardisMethod1ofaseriesofStandardscoveringtheVickershardnesstestingofmetallicmaterials.TheseriescomprisesthefollowingMethods:AS1817Metallicmaterials—Vickershardnesstest1817.1Method1:Testmethod(ISO6507-1:1997,MOD)1817.2Method2:Verificationoftestingmachines1817.3Method3:CalibrationofreferenceblocksThisStandardisamodificationofISO6507-1inwhichtheISOAnnexDandtheNoteinClause5.3havebeenchangedtoconformwithestablishedAustralianpracticesforVickershardnesstesting.TheforcevaluesinthisMethodwerecalculatedfromkilogramforcevalues.TheywereintroducedbeforetheSI-systemwasadopted.ItwasdecidedtokeepthevaluesbasedontheoldunitsforthisMethodbutinthenextrevisionitwillbenecessarytoconsidertheadvantageofintroducingroundedvaluesoftestforceandtheireffectonthehardnessscales.Attentionisdrawntothefactthat,inthisMethod,thefollowingaspectsshouldbeconsidered:(a)Thetestmethodisspecifiedforlengthsofindentationdiagonalsbetween0.020mmand1.400mm.(b)Ifthedifferencebetweenthelengthsofthetwoindentationdiagonalsisgreaterthan5%,thisisstatedinthetestreport.(c)Additionofprovisions,inClause8,concerningtheuncertaintyofthetestresults.AsthisStandardisreproducedfromanInternationalStandard,thefollowingapplies:(i)Itsnumberdoesnotappearoneachpageoftextanditsidentityisshownonlyonthecoverandtitlepage.(ii)Inthesourcetext‘thispartofISO6507’shouldread‘thisAustralianStandard’.(iii)Afullpointshouldbesubstitutedforacommawhenreferringtoadecimalmarker.ReferencestoInternationalStandardsshouldbereplacedbyreferencestoequivalentAustralianorAustralian/NewZealandStandards,asfollows:iiReferencetoInternationalStandardAustralianStandardISOAS6507Metallicmaterials—Vickershardnesstest1817Metallicmaterials—Vickershardnesstest6507-2Part2:Verificationoftestingmachines1817.2Method2:Verificationoftestingmachines6507-3Part3:Calibrationofreferenceblocks1817.3Method3:CalibrationofreferenceblocksTheterms‘normative’and‘informative’havebeenusedinthisStandardtodefinetheapplicationoftheannextowhichtheyapply.A‘normative’annexisanintegralpartofaStandard,whereasan‘informative’annexisonlyforinformationandguidance.Metallicmaterials—Vickershardnesstest—Part1:Testmethod1ScopeThispartofISO6507specifiesthemethodofVickershardnesstestforthethreedifferentrangesoftestforceformetallicmaterials(seetable1).Table1Rangesoftestforce,FNHardnesssymbolPreviousdesignation(ISO6507-1:1982)F49,031,961F,49,030,09807F,1,961HV5HV0,2toHV5HV0,01toHV0,2VickershardnesstestLowloadVickershardnesstestVickersmicrohardnesstestTheVickershardnesstestisspecifiedinthispartofISO6507forlengthsofindentationdiagonalsbetween0,020mmand1,400mm.TheforcevaluesinthispartofISO6507werecalculatedfromkilogramforcevalues.TheywereintroducedbeforetheSI-systemwasadopted.Itwasdecidedtokeepthevaluesbasedontheoldunitsforthisedition,butforthenextrevisionitwillbenecessarytoconsidertheadvantageofintroducingroundedvaluesoftestforceandtheconsequenceonthehardnessscales.NOTE—Ingeneral,decreasingthetestforceincreasesthescatterofresultsofthemeasurements.Thisisparticularlytrueforlow-forceVickershardnesstestsandVickersmicrohardnesstestswheretheprincipallimitationwillariseinthemeasurementofthediagonalsoftheindentation.ForVickersmicrohardness,theaccuracyofdeterminationofthemeandiagonallengthisunlikelytobebetterthan±0,001mm(seeannexE).Forspecificmaterialsand/orproducts,particularInternationalStandardsexist.2NormativereferenceThefollowingstandardcontainsprovisionswhich,throughreferenceinthistext,constituteprovisionsofthispartofISO6507.Atthetimeofpublication,theeditionindicatedwasvalid.Allstandardsaresubjecttorevision,andpartiestoagreementsbasedonthispartofISO6507areencouragedtoinvestigatethepossibilityofapplyingthemostrecenteditionofthestandardindicatedbelow.MembersofIECandISOmaintainregistersofcurrentlyvalidInternationalStandards.ISO6507-2:1997,Metallicmaterials—Vickershardnesstest—Part2:Verificationoftestingmachines.StandardsAustralia1ISO6507-1:1997(E)©ISO23PrincipleAdiamondindenterintheformofarightpyramidwithasquarebaseandwithaspecifiedanglebetweenoppositefacesatthevertexisforcedintothesurfaceofatestpiecefollowedbymeasurementofthediagonallengthoftheindentationleftinthesurfaceafterremovalofthetestforce,F(seefigure1).Figure1—PrincipleofthetestTheVickershardnessisproportionaltothequotientobtainedbydividingthetestforcebytheslopingareaoftheindentationwhichisassumedtobearightpyramidwithasquarebase,andhavingatthevertexthesameangleastheindenter.StandardsAustra