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Steel Spot And Plug Weld Nugget Size: Nissan/INFINITI
I-CAR · June 13, 2023 · Nissan, INFINITI
Summary
This article outlines Nissan and INFINITI requirements for spot and plug welding, including the need to increase spot weld counts by 20% to 30% compared to factory welds (which is already reflected in their service manuals). It also details limitations on welding ultra-high-strength steel (UHSS), prohibiting spot welding on steel higher than 980 MPa in favor of plug welding.
What to do on the job
Verify the tensile strength of the steel being welded; do not spot weld steel higher than 980 MPa (use plug welding instead), and ensure spot weld counts are increased by 20% to 30% over factory counts if not using service manual specifications.
How to use it
Use this document to justify the time and labor required for additional spot welds (20-30% increase) and to defend the necessity of plug welding over spot welding when working with ultra-high-strength steel (UHSS) exceeding 980 MPa. It also serves as a reference for locating the 'Body Repair Manual - Fundamentals - 2015 Edition' on the Nissan techinfo site.
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