Nick Break Test - A nick break test involves breaking the weld joint to examine the fractured surfaces for internal defects such as:
(i) Gas pockets
(ii) Slag inclusions
(iii) Porosity.
The test also determines weld ductility and the degree of fusion.
Procedure
The test specimen shall be cut transversely to the welded joint and shall have the full thickness of the plate at the joint. The excess weld metal and penetration bead shall be left intact. Slots are sawed at each end of the specimen to be tested.
