When is it advisable to use stringer beads in GTAW?

Stringer beads are characterized by a narrow, linear application of weld metal, which can help in controlling the heat input during the welding process. This technique is particularly advantageous when welding thin materials, as it minimizes the heat-affected zone (HAZ) and reduces the risk of burn-through or distortion. This is crucial when working with thin materials, where excessive heat can lead to severe structural issues and defects in the weld.

Using stringer beads allows the welder to focus the heat more precisely, leading to a more controlled and consistent weld pool. This control is vital to ensure adequate penetration and fusion without compromising the base material's integrity. Therefore, the strategic use of stringer beads is especially pertinent in scenarios where maintaining low heat input is necessary to ensure a quality weld on thin substrates.