HRGw - ASTM E18 & EN ISO 6508

  • reference blocks manufactured in accordance with EN ISO 6508-3 and ASTM E18-A4
  • for the annual indirect verification of the HRG hardness scale, the use of 3 blocks is necessary in the hardness ranges: 30~50 HRG, 55~75 HRG, 80~94 HRG
  • for purpose of routine checking, only one block with a nominal hardness corresponding approximately to that of the tests to be performed will be used
  • available as standard with ISO certificate and optional with UKAS certificate and/or marked with a hexagonal grid ranging from 2 mm to 6 mm (not 0.5 mm) for greater ease of testing