What is a characteristic of flux cored wires when used on thinner steel?

When using flux cored wires on thinner steel, it is important to recognize that one of the primary characteristics is their tendency to cause burn through. This occurs because flux cored wires typically generate a greater amount of heat during the welding process compared to solid wires. The higher heat input can lead to excessive melting of the base metal, which is particularly problematic when dealing with thinner sections of steel.

Burn through is characterized by holes or melting that can compromise the integrity of the material being welded. In the case of thin steel, the heat can easily penetrate through the material, resulting in defects that are detrimental to the overall strength and stability of the weld.

While other options relate to different aspects of welding and flux cored wires, the specific context of thinner steel highlights the challenge of managing heat effectively, making the risk of burn through a critical consideration when selecting welding materials and techniques.