NDT Hardness Blocks for Bench type Brinell Rockwell Vickers Hardness Tester

Brinell Hardness Block .

• • Purpose: It is used for the annual indirect verification and calibration of Brinell hardness testers, as well as for the cyclic (daily) checks of hardness testers.
  • Description: Usually made of aluminum for hardness values below 200 Brinell. The surface can be either shiny - polished or matte. The hardness block is rectangular, with dimensions of 150mm x 125mm x 16mm, and is available in Brinell scales ranging from 2.5/62.5 to 10/3000, with hardness values approximately 70, 100, 150, 170, 200, 250, 300, 350, 400, 450, 500, 550, 600, 650 HB. It comes with a UKAS certificate in accordance with ISO 6506 - 3 and ASTM E10.

    Type	Value range
    Rockwell	60-70HRC
    	35-55HRC
    	20-30HRC
    	60-70HRA
    	70-85HRA
    	85-95HRB
    	60-70HRB
    	45-55HRB (Copper)
    	30-40HRB(Copper)
    	90-100HRF
    	80-90HRF(Copper)
    Plastic Rockwell	70-94HRE (Copper)
    	100-120HRL (Copper)
    	85-100HRM (Copper)
    	114-125HRR (Copper)
    Superficial Rockwell	88-92HR15N
    	74-82HR30N
    	45-55HR30N
    	45-55HR45N
    	85-91HR15T
    	70-80HR30T
    	54-72HR45T
    Brinell	150-250HBW10/3000
    	150-250HBW5/750
    	150-250HBW2.5/187.5
    	75-125HBW10/1000
    	75-125 HBW5/250
    	75-125HBW2.5/62.5
    	250-350HBW10/3000
    	250-350HBW5/750
    	250-350HBW2.5/187.5
    Vickers	700-800HV3
    	700-800HV5
    	700-800HV10
    	700-800HV30
    	700-800HV50
    	400-600 HV5
    	400-600HV10
    	400-600 HV30
    	175-225 HV5

    Micro vickers	700-800 HV1
    	700-800 HV0.5
    	700-800 HV0.3
    	700-800HV0.2
    	400-600 HV0.2
    	400-600 HV0.1
    	175-225 HV0.1
    	175-225 HV0.05

• Rockwell Hardness Block
  • Purpose: Used to calibrate and verify the accuracy of Rockwell hardness testers. Different Rockwell hardness scales (such as HRA, HRB, HRC, etc.) require corresponding hardness blocks for calibration.
  • Principle: The Rockwell hardness test uses different indenter s and loads to press into the surface of the material. By measuring the depth difference of the indentation under the action of the pre - load and the total load, the Rockwell hardness value is obtained. The hardness block provides a standard indentation depth reference for this measurement.
• Vickers Hardness Block
  • Purpose: Used for the calibration and verification of Vickers hardness testers. It ensures that the Vickers hardness tester can accurately measure the hardness of materials.
  • Principle: The Vickers hardness test uses a diamond indenter with a 136° angle between opposite faces to press into the sample. The hardness value is represented by the quotient of the load divided by the indentation area. The Vickers hardness block has a known hardness value, and by comparing the indentation size and load on the hardness block with the standard value, the accuracy of the hardness tester can be evaluated