HARDNESS TESTING IS - PRWeb

HARDNESS TESTING ISCRITICALHardness testing provides critical information and insight intoa material’s durability, strength, flexibility and capabilities. It isa commonly used test method in many industries to verify heattreatment, structural integrity and quality of components.Hardness testing ensures the materials utilized in components weuse every day contribute to a well engineered, efficient and safeworld.Ensure AccurateHardness ResultsCalibrated test blocks are an integral part of hardness testing.They ensure accuracy, integrity and traceability of hardness testingprocesses. They are used to verify instruments performance andprovide a means for performing indirect instrument calibrations.Trusted in the IndustryBuehler’s Wilson test blocks are trusted by leading companies inindustry, especially those in the following Visit www.buehler.com for more information

Buehler Leadsthe Way inHardnessTesting.Buehler, with its Wilson line of hardness testers, is theglobal leader in hardness testing software, equipment andaccessories. Buehler is proud to be the proprietor of 100-yearold legacy brands including Wilson Instruments, Reicherter,and Wolpert, the innovators and founders of the hardnesstesting industry. Today, Buehler provides innovative solutionsfor hardness testers, DiaMet software and hardness testblocks.WilsonInstruments3

What SetsBUEHLER ApartConsistencyof ResultsStrict control over the raw materialsand tight specifications for heattreating improve the homogeneityand consistency of Buehler’s test blocks.These controls ensure that customerscan have confidence in the resultsachieved with Buehler’s test blocks.Leaders in the IndustryWilson originally developed the Rockwell testing process andstandards. Today, Buehler is continuing to push the materials testingindustry forward through active participation in ASTM and ISOcommittees. Buehler has been named an authorized calibratingagency for certain Master and Secondary standardized test blocksby ASTM.Visit www.buehler.com for more information

Globally RecognizedAccreditiationBuehler’s Test Block Calibration Laboratory is accredited to ISO / IEC 17025by the American Association for Laboratory Accreditation (A2LA). A2LAparticipates in the International Laboratory Accreditation Cooperation(ILAC) Mutual Recognition Arrangement (MRA). The ILAC MRA creates aglobal network of testing and calibration laboratories that have beenaccredited to provide accurate and reliable results.CERT#2237.01 - CALIBRATIONAdvanced Production CapabilitiesExtensive Product OfferingBuehler’s Test Block Calibration Laboratory has the capability toproduce and calibrate test blocks for many different hardnessscales. Rockwell: Regular and Superficial scales Vickers Microindentation: Loads from 10gf to 1kgf Vickers Macroindentation: Loads from 1kgf to 120kgf Knoop Microindentation: Loads from 10gf to 1kgf Brinell: HBW5/750, HBW5/250, HBW10/1000,HBW10/3000, HBW2.5/62.5, HBW2.5/187.5Experts in Surface PreparationSurface preparation is a critical aspect that affects the accuracyand consistency of a finished test block. Buehler’s expertisein sample preparation and high quality products have beenapplied to the in-house processing to continually produce testblocks with the highest quality surface finish.Advanced Hardness Testing MachinesThe Buehler Test Block Calibration Laboratory utilizes state ofthe art Buehler hardness testing systems for the calibrationprocess. These advanced systems have been built to providethe tightest control and consistency in the calibration process.5

Proper Use ofTest BlocksUseful Lifeof a Test BlockThe useful life of a test block isdetermined by the densityof indents on the surface.The density of indents isdetermined by the allowableindent spacing and variesby hardness test. Oncerecommended densities arereached, the test block must bereplaced. Test blocks must beused on the top side only andare recommended to bereplaced after five years.In-HouseVerification TestingThird-PartyVerification TestingIn-house verification testing isa critical part of hardness testingperformed by the user toensure conformance with ASTM& ISO standards. The frequencyis determined by the standard towhich the lab is operating. Somecommon reasons for conductinga verification test are: Beginning productioneach day Changing indenters Changing test forceIn addition to in-house dailyverifications, standards alsorequire indirect verifications tobe completed periodicallyby a certified body. Theseverifications check that theperformance of the machinemeets specifications and mustbe done on all hardness scalesand loads that the machine isused for.Visit www.buehler.com for more information

Proper Indent SpacingWhen making indentations on a test block, the hardness of the material immediately surrounding an indentation willusually increase due to the residual stress and work hardening caused by the indentation process. If an indentationis made too close to the edge of a test piece, there may be insufficient material to constrain the deformation aroundthe indentation. Both of these scenarios can lead to inaccurate hardness readings. To prevent incorrect readings,recommended spacing has been defined in the standards for each type of hardness test. To ensure proper spacingis followed, Buehler offers pattern engraving on the surface of test blocks.Rockwell & BrinellAccording to ASTM and ISO Standards: The distance betweenthe centers of two adjacent indentations shall be at least three timesthe diameter (d) of the indentation.The distance from the center of any indentation to an edge of thetest piece shall be at least two and a half times the diameter of theindentation.VickersAccording to ASTM Standards: The distance betweentwo indents or an indent and the edge of the test pieceshall be at least two and a half times the diagonal (dV) ofthe indentation.dV Vickers DiagonalKnoopAccording to ASTM Standards: The distance betweentwo indents shall be at least two times the diagonal (dK)of the indentation and two and a half times the width (dW)of the indentation. The distance between the center of anindentation and the edge of a test piece shall be at leastone diagonal (dK) or two and a half times the width (dW) ofthe indentation.According to ISO Standards: The distance between the centersof two indents shall be at least three times the diagonal (dV) of theindent for steel, copper and copper alloys, and at least six timesfor light metals, lead and tin and their alloys.The distance between the center of an indent and the edge of thetest piece shall be at least two and a half times the diagonal (dV)for steel, copper and copper alloys, and at least three times forlight metals, lead and tin and their alloys.* For steel, copper and copper alloys For light metals, lead, tin and their alloysAccording to ISO Standards: The distance between two in-dents shall be at least two times the diagonal (dK) of the indentation and three and a half times the width (dW) of the indentation.The distance between the center of an indentation and the edgeof a test piece shall be at least one diagonal (dK) or three and ahalf times the width (dW) of the indentation.dK Knoop Long DiagonaldW Knoop Short Diagonal7

TEST BLOCK ORDERING INFOThe following item numbers are the most commonly requested test blocks. Buehler’s product offeringand capabilities extend beyond these listed item numbers and the full product offering is listed on theBuehler website. Please contact us if you need assistance selecting an appropriate test block for 8160HRC920319163HRCRockwell E RF9206050W79.5HRF9206070W91HRFRockwell B Rockwell 15-T well30-T Nominal HardnessRockwell APart NumberRockwell F Wilson Rockwell Test BlocksPart NumberNominal 219090W70HR30T Certified using a Tungsten Carbide ball indenterSpecial Order ItemsPart NumberDescription9201002Special Range/Hardness Request9201003Engraving for Indent Spacing9201006API ComplianceVisit www.buehler.com for more information

Wilson Vickers-Knoop Test BlocksVickers Test BlocksAccording to ASTM E92 & ISO 6507Load (kg)HV0.1HV0.2HV0.3HV0.5HV1Part NumberNominal HardnessRange93-001-200200 HV93-001-42593-001-515Load (kg)Part NumberNominal HardnessRange175-22493-050-200200 HV175-224425 HV400-45093-050-310310 HV285-335515 HV490-54093-050-450450 HV425-47593-001-775775 HV750-80093-050-515515 HV490-54093-002-200200 HV175-22493-050-600600 HV575-62593-002-425425 HV400-45093-050-700700 HV675-72593-002-515515 HV490-54093-050-775775 HV750-80093-002-775775 HV750-80093-050-830830 HV805-85593-003-200200 HV175-22493-100-200200 HV175-22493-003-310310 HV285-33593-100-310310 HV285-33593-003-425425 HV400-45093-100-450450 HV425-47593-003-515515 HV490-54093-100-515515 HV490-54093-003-700700 HV675-72593-100-600600 HV575-62593-003-775775 HV750-80093-100-700700 HV675-72593-003-830830 HV805-85593-100-775775 HV750-80093-005-200200 HV175-22493-100-830830 HV805-85593-005-310310 HV285-33593-200-200200 HV175-22493-005-425425 HV400-45093-200-310310 HV285-33593-005-515515 HV490-54093-200-450450 HV425-47593-005-700700 HV675-72593-200-515515 HV490-54093-005-775775 HV750-80093-200-600600 HV575-62593-005-830830 HV805-85593-200-700700 HV675-72593-010-200200 HV175-22493-200-775775 HV750-80093-010-310310 HV285-33593-200-830830 HV805-85593-010-450450 HV425-47593-300-200200 HV175-22493-010-515515 HV490-54093-300-310310 HV285-33593-010-700700 HV675-72593-300-450450 HV425-47593-010-775775 HV750-80093-300-515515 HV490-54093-010-830830 HV805-85593-300-600600 HV575-62593-300-700700 HV675-72593-300-775775 HV750-80093-300-830830 HV805-855HV5HV10HV20HV30Knoop Test BlocksAccording to ASTM E92 & ISO 4545Load (kg)HK0.5Special Order ItemsPart NumberNominal HardnessRangePart Number94-005-225225 HK200-25093-000-001*Vickers Microindentation (10gf - 500gf)94-005-315315 HK290-34093-000-002*Vickers Macroindentation (1kgf - 50kgf)94-005-440440 HK415-46594-000-001*Knoop Microindentation (10gf - 500gf)94-005-540540 HK515-565 93-000-0122 Vickers-Knoop Calibrations94-005-630630 HK605-65593-000-013 3 Vickers-Knoop Calibrations94-005-730730 HK705-75593-000-0144 Vickers-Knoop Calibrations94-005-850850 HK825-875 Description*Specify hardness required and load force for calibration Specify additional load force for calibration9

TEST BLOCK ORDERING INFOWilson Brinell Test BlocksBrinell reference blocks up to 250kgf scale140 HBW115169WH-140HBW-625 WH-140HBW-1875200 HBW170224WH-200HBW-625 WH-200HBW-1875250 HBW225274WH-250HBW-625 WH-250HBW-1875300 HBW275324WH-300HBW-625 WH-300HBW-1875350 HBW325375WH-350HBW-625 WH-350HBW-1875400 HBW375449WH-400HBW-1875Brinell reference blocks up to 3000kgf loadNominalvalueminmaxHBW5/750 scaleHBW10/3000scale140 HBW115169WH-140HBW-750WH-140HBW-3000200 HBW170224WH-200HBW-750WH-200HBW-3000225 HBW212238250 HBW225274275 HBW262288300 HBW275324325 HBW312338350 HBW325375375 HBW362388400 HBW375449500 00HBW-3000WH-500HBW-750WH-500HBW-3000Visit www.buehler.com for more information