David Roberson <[email protected]> wrote: I found another entry relating to heat treating of metals. There is a > picture of a heat treated casting that states that it was just removed from > the oven after heating at 1200 C for 12 hours.
I presume the castings were removed a few minutes before the photo was taken and they have cooled down to around 900 deg C. Look at the first photo in this article, "Heat treating furnace at 1,800 °F (980 °C)." The red color is similar to the e-cat color, and to the 900 deg C mark on the incandescence color bar: http://en.wikipedia.org/wiki/Incandescence#mediaviewer/File:Incandescence_Color.jpg - Jed
