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This 10-minute tutorial video from Weld.com investigates common reasons why MIG welds fail to properly fuse with the base metal. Follow along as instructor Austin demonstrates and tests various problematic scenarios including incorrect machine settings, reversed polarity, and inadequate surface preparation. Learn through practical demonstrations as each issue is explored, followed by fillet weld break tests that clearly show the consequences of each mistake. The video includes detailed segments on joint coupon preparation, proper machine setup, and result inspection to help troubleshoot non-fusion issues in your own welding projects. Perfect for beginners struggling with MIG welding fundamentals or experienced welders looking to refine their technique and avoid common pitfalls that lead to weak or failing welds.
