What is a common limitation of resistance welding?

Resistance welding is primarily known for its suitability in joining thin sheets of metal, which is why the option about being limited to sheet metal applications is recognized as a common limitation. This process is advantageous for applications where multiple thin sheets are layered, such as in automotive manufacturing.

However, resistance welding is less effective for thicker materials since the heat generated may not be sufficient to create a strong joint. As the thickness of the metal increases, the resistance to current flow and heat generation changes, making it challenging to achieve the desired weld quality. Therefore, the focus on sheet metal applications reflects the limitations associated with thickness, rather than an exclusive ability to work only with thinner materials.

This characteristic highlights the ideal scenarios where resistance welding is most advantageous while pointing to its constraints when faced with various material thicknesses, especially in contexts requiring stronger or thicker joints.