Abstract 

The method specified is applicable only for determining Knoop hardness in accordance with ISO 4545 giving indentations with long diagonals longer than or equal to 20 micrometres. Describes manufacture of the block, standardizing machine, standardizing procedure, number of indentations, uniformity of hardness, marking and test certificate. Annex A describes adjustment of Abbe/Nelson or Kohler illumination systems.


General information

  • Status :  Withdrawn
    Publication date : 1993-03
  • Edition : 1
    Number of pages : 3
  • :
    ISO/TC 164/SC 3
    Hardness testing
  • 77.040.10
    Mechanical testing of metals

Got a question?

Check out our FAQs

Customer care
+41 22 749 08 88

Opening hours:
Monday to Friday - 09:00-12:00, 14:00-17:00 (UTC+1)

Keep up to date with ISO

Sign up to our newsletter for the latest news, views and product information.