previous reports have implicated compounds of chromium vi as the mutagenic and toxic agents in welding fumes , since only the particles from welding on stainless steel , which contains 15-25 % chromium , were mutagenic , whereas particles from welding on mild steel , which contain less than 0.1 % chromium , were not mutagenic or toxic .
C0038126
stainless
C0038239
steel