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 °C bis 300 °C |
| Ball diameter | 5 mm |
| Duration of test | 60 min |
| Weight | 20 N |
Temperature at which the ball produces an indentation measuring
2 mm in diameter.
