Standard test methods for elevated temperature described in ASTM E21 are valuable tools for determining a metal’s capacity to sustain applied tensile forces. The elevated temperature tensile test is most beneficial in ensuring that the tested material is similar to the reference material.
Force-measuring systems, extensometers, thermocouples, potentiometers, micrometers, and melting points are used in standard methods of ASTM E21. Cross-sectional area measurement determines the reduced section of the specimen’s minimum cross-sectional area and compares it with the minimum value to determine whether the requirements are satisfied.
Video 01: Elevated temperature tensile testing (High temperature test)
The length of the reduced section is less than 2in. (50 mm) and the nominal test temperature is 5°F (±3°C) according to ASTM E21 guidelines.
The highest force applied during a fracture test is divided by the original minimum cross-sectional area of the decreased section of the specimen to get the tensile strength.
Yield Strength offset = 0.2 %
Elongation gauge length = 4 diameters
Standard test methods for elevated temperature described in ASTM E21 are valuable tools for determining a metal’s capacity to sustain applied tensile forces.