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I am just writing to remind anyone and everyone who does not already know, that Zinc plated or Galvanized steels should never be used in blacksmithing. The Brake rotor forge I had recently build used a galvanized pipe flange. I knew about the perils of heating zinc long before building my forge, but I convinced myself that the pipe fitting wouldn't get hot enough to vaporize (1665 F). I was obviously quite wrong. This past weekend I was out using the forge and as soon as I came back in the house my throat felt awful and raspy. The next day I had a few flu like symptoms that seemed similar to the Infamous "Metal fume Fever". Thank God, by Sunday morning I was feeling fine and my illness had past. I have a good reason to believe that my brief ailment was caused by zinc fumes and was not just coincidental. The Bottom Line is beware of Zinc coated steel when blacksmithing and never use them in forge construction unless you are 100% sure that they will not get too hot!