Designation:A1038−13´1StandardTestMethodforPortableHardnessTestingbytheUltrasonicContactImpedanceMethod1ThisstandardisissuedunderthefixeddesignationA1038;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ε1NOTE—Table3headingwascorrectededitoriallyinApril2016.1.Scope*1.1Thistestmethodcoversthedeterminationofcompara-tivehardnessvaluesbyapplyingtheUltrasonicContactImpedanceMethod(UCIMethod).1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2A370TestMethodsandDefinitionsforMechanicalTestingofSteelProductsE10TestMethodforBrinellHardnessofMetallicMaterialsE18TestMethodsforRockwellHardnessofMetallicMa-terialsE140HardnessConversionTablesforMetalsRelationshipAmongBrinellHardness,VickersHardness,RockwellHardness,SuperficialHardness,KnoopHardness,Sclero-scopeHardness,andLeebHardnessE177PracticeforUseoftheTermsPrecisionandBiasinASTMTestMethodsE384TestMethodforMicroindentationHardnessofMate-rialsE691PracticeforConductinganInterlaboratoryStudytoDeterminethePrecisionofaTestMethod3.Terminology3.1Definitions:3.1.1calibration—determinationofthespecificvaluesofthesignificantoperatingparametersoftheUCIinstrumentbycomparisonwithvaluesindicatedbyastandardizedworkbenchhardnesstesterorbyasetofcertifiedreferencetestpieces.3.1.2surfacefinish—allreferencestosurfacefinishinthistestmethodaredefinedassurfaceroughness(thatis,Ra=averageroughnessvalue).3.1.3UCIhardnesstest—ahardnesstestingmethodusingacalibratedinstrumentbypressingaresonatingrodwithadefinedin...
