№2. Cold tolerance
Cold resistance of the workpiece
The test shall be performed on a piece of workpiece 300 mm long and kept at minus temperature for at least 1 h.
Then, within 10 second, drop a 1 kg weight onto the workpiece from a height of 150 cm to test its cold resistance.
If the surface of the workpiece cracks, no damage has occurred and the finishing layer has not been detached, the test is considered to have passed.
