Designation:A833−08a(Reapproved2014)StandardPracticeforIndentationHardnessofMetallicMaterialsbyComparisonHardnessTesters1ThisstandardisissuedunderthefixeddesignationA833;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticecoversthedeterminationofindentationhardnessofmetallicmaterialsusingcomparisonhardnesstesters.1.2Thispracticeappliesonlytothosecomparisonhardnesstesters,normallyportable,thatusecomparativetestbarsthathavebeenstandardizedaccordingtoTestMethodE10asabasisforcomparison.1.3Calibrationofcomparativetestbars(rods),usedforcomparisontodeterminehardnessnumbers,isalsocoveredbythispractice.1.4Theimpressionforceusedduringcomparisonhardnesstestingisnormallyanimpactloadappliedbystrikingahammerontheappropriateareasasoutlinedinthemanufac-turer’sinstructions.1.5ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyproblems,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2A370TestMethodsandDefinitionsforMechanicalTestingofSteelProductsE10TestMethodforBrinellHardnessofMetallicMaterials3.SignificanceandUse3.1Thecomparativehardnesstestisanempiricaldynamicindentationhardnesstest.Comparativehardnesstestsprovideusefulinformationaboutmetallicmaterials.Thisinformationmaycorrelatetotensilestrength,wearresistance,ductility,heattreatmentcondition,orotherphysicalcharacteristicsofmetal-licmaterials,andmaybeusefulinqualitycontrolandselectionofmaterials.3.2Comparativehardnesstestingataspecificlocationonapartmaynotrepresentthephysicalcharacteristicsofthewholepartorendproduct.4.Apparatus4.1Com...
