Do all types of welding produce harmful fumes?

Most forms of welding produce some level of fumes, but the amount and type vary a lot. Processes like MMA (stick), MIG and flux-cored welding tend to produce the heaviest fumes. TIG welding produces less particulate fume but can still generate harmful gases like ozone and nitrogen oxides.

Even low-fume processes aren’t automatically safe — the metal type matters too. Stainless steel and galvanised materials can release more hazardous components. So yes, pretty much all welding needs proper control measures, even when the process looks “cleaner.”