Quote Originally Posted by bigjoshl View Post
If it is not magnetic, but is colored similar to steel it could be zinc or magnesium, aluminum is usually whiter in color than steel.If you have a grinder see if it sparks that could narrow down the options.
No sparks on the grinder, which barely touches it btw. Also heating with a propane torch does not produce any glow. I'm starting to wonder if it could be carbide?