What is meant by "weld bead"?

A "weld bead" refers to the visible line of metal that is deposited along the joint during the welding process. It represents the molten filler metal that solidifies as the welder moves the electrode along the weld path. The characteristics of the weld bead—such as its width, height, and overall appearance—can indicate the quality of the weld and the skill of the welder.

The bead can provide insights into the welding parameters used, such as travel speed, heat intensity, and electrode angle. A well-formed weld bead is often smooth and uniform, whereas defects like undercutting or porosity can indicate problems in the welding technique or settings. Understanding the concept of a weld bead is vital for assessing weld quality and ensuring structural integrity in welded applications.