Rockwell Hardness Testing Calibration Kits


Rockwell Calibration Sets contain three test blocks (low, medium, and high), an indenter, and a case. Each component can also be purchased separately and has its own part number. The calibration sets are assembled and shipped from the Wilson Test Block Calibration Laboratory. All calibration sets conform to ASTM E18; in addition, all calibration sets with a ball penetrator also conform to ISO 6508-3.

  • We work directly with the steel and brass mills to specify the chemical composition
  • Our machining processes (grinding, lapping, polishing) are all done in house, at the site of calibration.
  • 100% inspection to ensure that every single test block meets the physical requirements of ASTM (thickness, flatness, parallelism, surface roughness)
  • Rockwell test blocks support NADCAP compliance
  • Rockwell Hardness Testing Calibration Kits Specifications
    Block size: Ø 2.4 in x 0.35 in (Ø 60mm x 9mm)
    Block weight: ±0.66 lbs (± 0.3kg)
    Certification: According to ISO 6508-3 & ASTM E18
    The Buehler-Wilson Hardness Calibration Laboratory is accredited to ISO / IEC 17025 by A2LA

    HR Scale Part Number Block Nominal Hardness Indenter Indenter Type Quick Quote
        Low Medium High      
    A 9100489 35 73 83 900006838 A Brale
    B W 9100491W 40 70 95 9100405 1/16" Carbide Ball Penetrator
    C 9100498 25 45 63 9100401 C Brale
    E W 9100497W 75 87 99 9100405 1/8" Carbide Ball Penetrator
    F W 9100499W 63 86 97 9100405 1/16" Carbide Ball Penetrator
    15N 9100493 72 83 91 900002015 N Brale
    30N 9100490 46 64 80 900002015 N Brale
    45N 9100494 25 49 70 900002015 N Brale
    15T W 9100496W 77 84 91.5 9100405 1/16" Carbide Ball Penetrator
    30T W 9100492W 50 63 80 9100405 1/16" Carbide Ball Penetrator
    45T W 9100495W 23 43 67 9100405 1/16" Carbide Ball Penetrator

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