This test method is used to determine dimensional stability under stress at elevated temperatures.

It analyses the relationship between the degree of deformation and the temperature when the test specimen is subjected to a constant load.

Ball pressure test

Test specimen	127 mm * 12,7 mm * 3 mm
Temperature range	23 ¡ãC bis 300 ¡ãC
Ball diameter	5 mm
Duration of test	60 min
Weight	20 N