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Rockwell Test Blocks


Description

Wilson Instruments Rockwell test blocks set the standard for the industry and are made from the highest quality material to insure the most uniform and repeatable blocks available. Precision lapping guarantees a block surface rating (finish) of less than three micro-inches and a test and supporting surface of extreme flatness and parallelism Rockwell Test blocks are calibrated to meet American and international standards at the Wilson Instruments Hardness Calibration Laboratory in Canton, Massachusetts. The Wilson lab is accredited to ISO / IEC 17025 by NVLAP and the testers used in the calibration process undergo a stringent monitoring process using NIST traceable devices. Wilson Instrument's attention to detail and precision is unsurpassed in the test block industry. NVLAP certificate includes measurement uncertainty value.

A comprehensive variety of scales and blocks are available to meet the wide ranges and scales associated with Rockwell testing.

Custom test blocks and scales are available, contact us for more information

Principle of Operation

Rockwell test blocks provide a relatively easy and inexpensive means for verifying tester, indenter, and system performance. Rockwell hardness test blocks are reference materials, standardized to determine the average hardness of the block surface. The resultant certified value provides a reference number and tolerance that should be met during the tester verification process to insure compliance with performance standards. Checking against test blocks should be a daily procedure; generally it is recommended that the high, middle, and low range of the given scale is verified. A minimum of five tests should be performed on the standardized surface of the block – the average must fall within the tolerance of the indicated block value for the tester to be considered in calibration.
Note: All block values listed are nominal levels, the actual calibrated value will vary. For more information, please refer to the "Hardness Range" section under block details.


Rockwell Test Block
Rockwell Test Block

Features

  • Rockwell test blocks are calibrated at the Wilson Instruments Hardness Calibration Laboratory in Canton Massachusetts in accordance with ASTM E18-00 section C using N.I.S.T. Rockwell HRC standard reference materials.
  • All other Rockwell scales are traceable to Wilson Instruments hardness levels through laboratory standardizing machines.
  • All Wilson Instruments Laboratory machines are directly verified according to applicable ASTM parameters using devices that are traceable to N.I.S.T. either directly or through a NVLAP approved laboratory.
  • All hardness levels are nominal values, the actual calibrated values will vary. See hardness range section.
  • Dimensions of Rockwell lest blocks are 2.38 in (60.4 mm) in diameter and .250 - .350 in (6.35 - 8.89 mm) thick.
  • The Instron-Wilson Instruments Hardness Calibration Laboratory is accredited to ISO / IEC 17025 by NVLAP (The National Voluntary Laboratory Accreditation Program) for Rockwell, Knoop, Vickers and Brinell hardness test blocks and indenters.
View units as:
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Cat#Item NameHardness ScaleNominal Hardness ValueDetails
9201-030Test Block 22 HRA HRA 22 Click to view item details and specificationsTest Block 22 HRA
9201-040Test Block 26.5 HRA HRA 26.5 Click to view item details and specifications
9201-050Test Block 30.5 HRA HRA 30.5 Click to view item details and specifications
9201-060Test Block 35 HRA HRA 35 Click to view item details and specifications
9201-070Test Block 39.5 HRAHRA 39.5 Click to view item details and specifications
9201-080Test Block 44 HRA HRA 44 Click to view item details and specifications
9201-090Test Block 49.5 HRAHRA 49.5 Click to view item details and specifications
9201-100Test Block 58 HRA HRA 58 Click to view item details and specifications
9201-110Test Block 63 HRAHRA 63 Click to view item details and specifications
9201-120Test Block 65 HRA HRA 65 Click to view item details and specifications
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