TechnicianVision · Knowledge base
Steel Spot And Plug Weld Nugget Size: Mitsubishi - UPDATE
I-CAR · February 26, 2021 · Mitsubishi
Summary
This article outlines Mitsubishi's specific guidelines for spot and plug welding, including formulas for spot welding tip diameters and requirements for plug weld hole sizes. It notes that Mitsubishi does not specify a precise nugget size, directing technicians to general I-CAR guidelines for that detail.
What to do on the job
Use plug welding instead of spot welding if the total panel thickness is 3 mm or more, and ensure plug weld holes are drilled to 5-6 mm in diameter and filled completely in a single pass.
How to use it
Use this document to justify the transition from spot welding to plug welding on thick structural joints (3 mm or greater) and to defend the labor required for proper 5-6 mm plug weld preparation and single-pass execution as mandated by Mitsubishi.
This page is a summary written by TechnicianVision. The document itself belongs to its publisher — follow the link above to read it in full.
TechnicianVision puts procedures like this next to the repair order you are working on. Create a free account →