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  1. GlassMann

    SiO2 melting

    Delta2112, I don't really know any details. I do know steel mills use carbon electrodes which melt using an electric arc. I once visited a plate glass factory that had an electric furnace but I'm not positive that the elements were the arcing type, maybe they were "normal" heat...
  2. GlassMann

    SiO2 melting

    I'm not a scientist, but being an art glassblower I know a little about refractories and crucibles. The highest temp insulation I'm aware of is graphite felt which melts above 5000f. As for crucibles, graphite and quartz both have hi temp ratings. I don't know if they are suitble for your...
  3. GlassMann

    Mild Steel Temp Limit?

    boo1, I just started using the black plumbing pipe because it was readily available and cheap. What are the names/numbers for some common heat resistant alloys? Thanks, Glenn
  4. GlassMann

    Mild Steel Temp Limit?

    Thanks Ron, I'd planned on coating the steel with a graphite mold coating. Maybe that will help? I'll sand blast the form and recoat before each firing. If that doesn't work I guess I'll switch to stainless. Glenn
  5. GlassMann

    Mild Steel Temp Limit?

    I'm a glass artist working on a new project. I'm planning to wrap/thread molten glass around a rotating steel frame. I'm wondering how much heat the steel (common black plumbing pipe) can withstand before "fire scaling" will become a problem. I plan to coat the frame with a graphite...

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