NBN EN 10319-1 : 2003

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and designations
5 Principle
6 Apparatus
   6.1 Testing machine
   6.2 Extension measuring device
   6.3 Heating device
        6.3.1 Permissible temperature deviations
        6.3.2 Temperature measurement
        6.3.3 Calibration of the thermocouples and temperature
               measuring system
7 Test pieces
   7.1 Shape and dimensions
   7.2 Preparation
   7.3 Determination of the original cross-sectional area
8 Test procedure
   8.1 Determination of the modulus of elasticity at ambient
        temperature
   8.2 Heating of the test piece
   8.3 Application of the total strain
   8.4 Maintaining of strain
   8.5 Records
        8.5.1 Temperature
        8.5.2 Residual stress
        8.5.3 Time
        8.5.4 Stress relaxation curve
   8.6 Termination of test
   8.7 Test interruption
9 Accuracy of the results
   9.1 Expression of the results
   9.2 Uncertainty
10 Test report
Annex A (informative) - Information concerning different types
                        of thermocouples
Annex B (informative) - Information concerning methods of
                        calibration of thermocouples
Bibliography

Describes the test method for the determination of relaxation of stress of metallic test pieces subjected throughout the test to nominally constant strain and constant temperature conditions.