Originally Posted by Daryl Hallquist
I remember Dr. Gaddy discussing a test he did. He made two rectangular pieces of steel, then color case hardened them. He put one piece in a window sill and the other in a drawer or similar. After an extended period of time, he put them side by side. There was no difference in color.


I remember the same. This was pretty much the definitive answer.

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BrentD, (Professor - just for Stan)
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