TIG vs MIG vs Spot Welding: Which Process?

Understand the three main welding processes and when to use each.

Three welding processes used in sheet metal fabrication

MIG (Metal Inert Gas): fast, good for steel, thick material

Spatter, needs grinding after

Best for structural steel frames, thick brackets

TIG (Tungsten Inert Gas): slow, precise, clean weld

For stainless and aluminum

Weld can be ground smooth (no crevices) for food / pharma

Best for stainless enclosures, visible welds

Spot welding: resistance welding, no filler, fast

For thin sheet overlap joints

Best for cabinet frames, sheet metal assemblies

How to choose: steel structure → MIG

Stainless/aluminum visible → TIG

Thin sheet overlap → spot

At Yiguangnian, we have certified welders for all three processes, and recommend the right process based on your material and finish requirements.