What is commonly a sign of a strong weld?

A strong weld is typically characterized by a uniform bead appearance, indicating that the weld metal has been deposited evenly and has penetrated the base material properly. This uniformity suggests that the welder controlled the heat input, travel speed, and electrode manipulation effectively during the welding process. A consistent bead indicates good fusion between the materials being joined, which is critical for the structural integrity and strength of the weld.

The appearance of excessive slag can point to issues in the welding process, as it may indicate that the welding parameters were not balanced correctly. Wide gaps between joints suggest poor fit-up or preparation, which can adversely affect the strength of the weld. Discoloration can occur due to overheating, oxidation, or other factors, and while some discoloration may be acceptable, it can also signal problems such as excessive heat input that could compromise the quality of the weld. Therefore, the uniform bead appearance serves as a reliable indicator of a strong and effective weld.