Occupational asthma has been documented in electric arc welders exposed to manual metal arc welding on stainless steel. A subject is described who developed late and dual asthmatic reactions after occupational-type challenge exposure to gas metal arc welding on uncoated mild steel.
Vandenplas, O., Dargent, F., Auverdin, J. J., Boulanger, J., Bossiroy, J. M., Roosels, D., & Vande Weyer, R. (1995). Occupational asthma due to gas metal arc welding on mild steel. Thorax, 50(5), 587-8: discussion 589. https://doi.org/10.1136/thx.50.5.587 (Original work published 1995)