Incomplete penetration
Lack of penetration defects occur when the welding process does not fuse through the entire plate thickness. The joint is too thin and unreliable.
Physical-Chemical Mechanism of Action
The welding process should melt the base material over the entire required plate thickness to create a strong joint. If this process fails and does not fully penetrate the full thickness, lack of penetration defects occur.
Metallurgical Relevance & Risks in Welding
Lack of penetration defects lead to an insufficient connection between parts. This can result in cracks, failure under load, and reduced service life of the components. The parts are no longer safe and can suddenly fail.
Workshop Practice & Instructions
To avoid lack of penetration defects, the weld must be at least 1 mm thick and fully fused over the entire plate thickness. Regularly check weld quality with a microscope or an ultrasonic testing device. Pay attention to correct welding parameters such as temperature, voltage, and time.