Root reinforcement target value
The root reinforcement target value specifies how high the weld profile should be above the material surface. Excessive reinforcement can lead to stress and cracking.
Physical-Chemical Mechanism of Action
The root reinforcement setpoint refers to the maximum height of the weld above the material surface. This value affects the stress distribution in the weld and can change the material's microstructure.
Metallurgical Relevance & Welding Risks
Excessive root reinforcement leads to increased stresses in the weld, raising the risk of cracks and fractures. This can be problematic especially with stiff steels or under high mechanical loads.
Shop Practice & Action Guidelines
Generally, the root reinforcement setpoint should be between 0.2 mm and 0.5 mm. For particularly stiff steels or under high mechanical loads, a higher reinforcement up to 1 mm is allowed. It's important to stick to the setpoint precisely to maximize weld life and avoid cracking.