Toe crack

Physicochemical Mechanism of Action

A weld toe crack occurs when the notch stress area at the transition from weld metal to base metal is too high. This leads to stress concentrations that can initiate cracks.

Metallurgical Relevance & Risks in Welding

A weld toe crack can cause component failure and safety issues. It can result from inadequate notch stress compensation or incorrect welding parameters.

Workshop Practice & Action Guidelines

To avoid weld toe cracks, ensure correct notch stress compensation. Use appropriate welding methods and parameters. For high-notch-sensitive steels, pre-beveling or a special weld profile may be necessary.