Heat tint in oxygen depleted environment
Heat tint in oxygen depleted environment
(OP)
Will stainless steels still tint with heat if the atmosphere is oxygen depleted? I'm looking at the inside of a pyrolysis unit. The process operates under nitrogen blanket to avoid auto-ignition of off-gasses.
Thanks
Thanks





RE: Heat tint in oxygen depleted environment
http://www.bssa.org.uk/topics.php?article=140
RE: Heat tint in oxygen depleted environment
And even parts exposed to high temp may only turn a light straw color.
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P.E. Metallurgy, Plymouth Tube
RE: Heat tint in oxygen depleted environment
RE: Heat tint in oxygen depleted environment
RE: Heat tint in oxygen depleted environment
Also very common to see heat tints on 420 grade, mainly Cr2O3.
To avoid Cr2O3, the dew point needs to be lower than -90F at 500C, needs to lower than -40F at 1000C
RE: Heat tint in oxygen depleted environment
RE: Heat tint in oxygen depleted environment
So yes, the color tells you nothing in low oxygen environments, unless you find that you have a leak.
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P.E. Metallurgy, Plymouth Tube
RE: Heat tint in oxygen depleted environment