What does the term "arc length" refer to in welding?

The term "arc length" in welding specifically refers to the distance between the electrode and the workpiece during the welding process. Maintaining the correct arc length is crucial because it directly affects the quality of the weld. A shorter arc length can produce a hotter, more concentrated arc that helps achieve better penetration, while a longer arc length can lead to a cooler, less stable arc, resulting in inadequate fusion and poor weld quality.

Understanding arc length is essential for achieving optimal welding parameters and can influence factors such as bead width, penetration depth, and overall weld integrity. Adjusting this distance appropriately is a fundamental skill for welders to master, as it plays a vital role in producing strong and effective welds.