Key takeaways
- MIG is fast and clean on clean steel indoors.
- TIG is precise and ideal for stainless, aluminum and thin metal.
- Stick and flux-core handle wind, rust and thick steel.
- The right process depends on metal, thickness and conditions.
MIG and TIG
MIG uses a wire that feeds automatically with shielding gas, making it fast and relatively easy to run on clean steel, stainless and aluminum indoors or in calm air. TIG uses a tungsten electrode with filler added by hand, giving the best control and cleanest welds, though it is slower and fussy about dirt and drafts.
For thin material, visible joints and special metals, TIG is often the better choice. For production and general fabrication, MIG usually wins on speed.
Stick and flux-core
Stick welding uses a coated rod that carries its own shielding. It tolerates wind, rust and paint and penetrates well, which is why it is still a field staple. Flux-core uses a wire with a flux inside and, in self-shielded form, needs no gas, making it popular for outdoor and structural work.
Both create slag that must be cleaned between passes, and both can be messy, but for thick steel and rough conditions they are hard to beat.
How we choose
We pick the process by metal, thickness, joint, position and where the work is. Outdoors in wind, rusty steel and structural plate point to stick or flux-core. Stainless railings and aluminum trailers point to TIG or spool-gun MIG. Clean shop fabrication often uses MIG.
Our Welding Process Finder on this site gives a starting recommendation for your metal and conditions.
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Quick answers
Which is strongest?
Strength depends on joint design, penetration and filler, not on the process alone. Any of them can make a strong weld when done correctly.
Why not use MIG for everything?
MIG needs clean metal and still air. Outdoors, in wind or on rusty steel, shielding gas blows away and welds can be poor, so other processes are better.
Ready to talk it through? Get a free estimate or call 615-209-7643.