This test is useful for determining the internal quality of the weld metal to reveal the internal imperfections (if present) such as slag inclusion, lack of fusion, incomplete penetration, porosity, etc. The weld specimen is fractured along an artificial notch that is intentionally machined on the center line of the weld specimen to facilitate fracture in the center of the weld.
The fractured specimen cross section is then visually examined for imperfections. The test is performed on fillet weld and butt weld joint.
Fracture Test:
- T – Joint
- Lap Joint
Nick-Break Test:
- Butt Joint
Test Method/Specifications:
- ASME IX
- AWS D1.1
- AWS D1.2
- AWS D1.6
- API 1104
- BS EN ISO 15614
- BS EN ISO 9606
- BS 4515