Stainless steel welding fumes contain which elements?

• A. Nickel and chromium
• B. Copper and zinc
• C. Lead and mercury
• D. Titanium and vanadium

Answer: (A)

Stainless steel welding fumes contain nickel and chromium because stainless steels are iron alloys that include chromium for corrosion resistance and often nickel to improve formability and stability. When welding, the heat releases metal oxides from these elements, producing fumes that workers can inhale. Nickel and chromium compounds are the typical constituents of these fumes, and they pose health risks, making proper ventilation and protective measures important. The other pairs—copper and zinc, lead and mercury, titanium and vanadium—aren’t characteristic components of stainless steel alloys, so they don’t usually appear as the main elements in stainless steel welding fumes.