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Welding 101

A plain-English guide to welding, what it is, what it fixes, and when to call a pro.
The LEARN section • Cote Welding & Ironwork

Welding has a reputation for being complicated and a little mysterious. It really is not, at least not the parts that matter to you. This is a straight-talk guide from a working welder, no jargon, written so a normal person can understand what welding is, what it can do for you, and how to tell good work from bad.

What welding actually is

Welding is joining two pieces of metal by melting them where they meet so they flow together and freeze into one solid piece. That is the whole idea. It is not glue and it is not bolts. Done right, the seam ends up as strong as the metal around it, or stronger, and you often cannot even tell where it was. It is a tiny, controlled bolt of lightning, and yes, it runs hotter than the surface of the sun.

What it does for regular people

Welding is how you fix metal instead of throwing it away and buying new. A cracked trailer frame, a broken railing, a snapped bucket on a piece of equipment, a gate that rusted through, a custom rack or bracket that does not exist in any store. All of that is a weld, and all of it is usually cheaper than replacing the whole thing. A mobile welder brings that to your driveway or job site, so the broken thing never has to move.

The main types, at a glance

There is more than one way to weld, and the right one depends on the metal and the job. The short version: MIG is the fast workhorse, TIG is the precise one for aluminum and show work, and stick is the tough, forgiving one that works outdoors. Full plain-English breakdown here: MIG, TIG, or Stick?

Dig into any of it

MIG, TIG, or Stick?
Three ways to join metal, and why a welder reaches for one over another.
What Metals Can Be Welded?
Most metals can be joined, but each one behaves differently. The metal decides the plan.
How to Tell a Good Weld From a Bad One
You don't need to be a welder to spot a bad one. Here's what to look for.
Why Welds Crack (and How We Stop It)
A cracked weld is almost never bad luck. It's one of a few preventable mistakes.
Can You Weld Cast Iron?
Yes, but it's one of the trickiest repairs in the trade, and most people get it wrong.
How Hot Is a Welding Arc?
Hotter than the surface of the sun. Here's what's actually happening.
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