Undercut in Welding: What It Is and How to Prevent It
How does undercut weaken welds, and what simple tweaks can stop it before it ruins your joint?
Category Automotive Welding Guide
Your complete guide to automotive welding with Ryan Mitchell — a 38-year-old professional welder with 17+ years of real-world experience in collision repair, custom fabrication, and classic car restoration.
In this category, Ryan breaks down everything you need to know: MIG, TIG, spot, stick, and resistance welding techniques, weld joints and types, common defects (porosity, undercut, burn-through, etc.), troubleshooting tips, welding parameters, materials, and all the essential terms every auto tech and DIYer should master.
Whether you’re repairing a daily driver, building a custom chassis, or restoring a vintage muscle car, you’ll find clear, practical, shop-floor advice designed to help you weld stronger, smarter, and safer.
New articles added regularly. Start learning today and take your automotive welding skills to the next level.
What Is Weld Porosity and Why Does It Happen?
Learn what weld porosity is, why it forms, and the hidden mistakes that could be weakening your welds.
Duty Cycle in a Welder: Definition and Importance
Now discover what a welder’s duty cycle really means and why ignoring it could quietly ruin your welds.
Wire Feed Speed in MIG Welding: What It Means
Discover how wire feed speed quietly shapes MIG weld quality—and why getting it wrong can ruin everything.
What Is Shielding Gas and Why Welding Needs It?
Understanding shielding gas reveals why clean welds succeed—and which gases protect your work best.
What Is Weld Distortion and What Causes It?
A] quick look at weld distortion reveals why metal warps, but the real causes—and how to prevent them—may surprise you.
What Is a Tack Weld and How Is It Used?
Begin with a tack weld to hold parts in place, but discover why its placement and size can make or break your final weld.
What Is a Plug Weld and How Is It Done?
Plug welds join overlapping metal sheets cleanly and strongly, but getting them right takes more than just drilling a hole.
Lap Welds in Auto Body: Definition and When to Use Them
Uncover when lap welds make auto body repairs easier, stronger, and smarter—plus the hidden pitfalls that could ruin your panel.
What Is a Butt Weld in Auto Body Repair?
What is a butt weld in auto body repair, and why can this simple joint make or break a flawless, rust-resistant panel repair?