Welding Journal

Q: We currently weld steel assemblies and have been asked to investigate the feasibility of welding aluminum. I have heard this will require more welding current. What about weld time and force requirements? Can you explain the reasoning behind these requirements?

A: Resistance spot welding (RSW), like many of the other solid-state processes, relies on the inherent bulk resistivity of a material as its means of generating heat when a current is passe..