Can I Weld Cast Iron with a MIG Welder? Here's the Truth

A lot of people ask, "can i weld cast iron with a mig welder" when they're staring at a cracked engine block, a broken garden bench, or an old skillet that's seen better days. The short answer is yes, you can, but it's definitely not as straightforward as sticking two pieces of mild steel together. If you just jump in and start pulling the trigger like you're building a backyard fire pit, you're probably going to hear a disheartening tink sound as the metal cracks right next to your fresh weld. ...

February 18, 2026 · 7 min · Leader Otis