← Glossary
Technological bend test
The technological folding test is a forming test where a weld specimen is folded around a bending mandrel. It checks the freedom from cracks and the deformability of the weld.
Physical-Chemical Mechanism of Action
The specimen is folded to a specified angle under mechanical load. This requires some elasticity and crack resistance from the material.
Metallurgical Relevance & Welding Risks
A failed fold test indicates cracks or excessive stress in the weld. This can lead to notches, wear, or sudden fractures.
Workshop Practice & Instructions
Use a bending mandrel with a specified angle (typically 90°). The specimen should be at least 10 mm wide and 25 mm long. Fold it gently without applying too much force. A successful test shows no visible cracks or deformation.
MetallurgieSchweißtechnik