EN 843-4:2005

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Significance and use
  4.1 General points
  4.2 Verification of test equipment
  4.3 Conversion of hardness numbers to other scales
5 Test method: method A: Vickers test
  5.1 Principle
  5.2 Machine calibration
  5.3 Test piece
  5.4 Test procedure
  5.5 Accuracy and uncertainties
6 Test method: Method B: Knoop test
  6.1 Principle
  6.2 Machine calibration
  6.3 Test piece
  6.4 Test procedure
  6.5 Accuracy and uncertainties
7 Test method: Method C: Rockwell tests
  7.1 Principle
  7.2 Machine calibration
  7.3 Test piece
  7.4 Test procedure
  7.5 Accuracy and uncertainties
8 Interpretation
  8.1 Microstructural factors
  8.2 Interpretation of results
9 Test report
Annex A (informative) Interlaboratory evaluation of
        hardness test methods
Bibliography

This part of EN 843 defines conditions for conducting, and provides guidelines concerning the value that may be ascribed to the results of, standard hardness tests when applied to advanced monolithic technical ceramics. It is assumed that the calibration and test procedures employed are exactly those for metallic materials. This European Standard refers to Rockwell A, Rockwell N-scale, Vickers, and Knoop hardness testing, as described in existing international standards.