Incomplete penetration
Incomplete penetration: The weld metal does not reach the specified depth in the joint, resulting in insufficient cross-section coverage and reduced mechanical strength.
Physical-Chemical Mechanism of Action
The weld metal (e.g., steel) is heated and plastified by welding in the joint. If it doesn't fully penetrate to the required depth, part of the metal remains unmelted or underdeveloped. This leads to incomplete cross-section coverage of the joint.
Metallurgical Relevance & Welding Risks
Lack of penetration can lead to various problems: it significantly reduces the mechanical strength of the joint and increases the risk of cracks and wear. In heavily loaded applications, this can cause early failure of the weld.
Workshop Practice & Action Guidelines
To avoid lack of penetration, watch the following points:
• Correct Settings: Set the welding machine so the weld fully penetrates.
• Joint Preparation: Remove all contaminants and make sure the joint is clean.
• Monitor the Welding Process: Watch the weld and adjust settings or positioning as needed.