corrosion resistant steel at 900C?

Question

HiI have some formed sheet metal parts (currently using 316 stainless)that have to pass through an oven at 900C. The problem is that theydevelop a soot on the surface that comes off on the hands when theparts are handled.Can anyone recommend a material that will remain clean to handle? Thepart is basically an 8" square sheet (.025" thk) with two large radius90 degree bends in it. It see's almost no stress and does not need tobe dimensionally stable.Thanks in advance for any suggestions,Jon Crouch.

Pittsburgh Pete · Accepted Answer

Jon:Assuming that your furnace has an air environment, your "soot" may beoxide scale that comes off during handling.Is so, then you probably need to use a different stainless steelcontaining more chromium in order to resist scaling at 900 C.See the AZOM article on Stainless Steel - High Temperature resistanceand look at Table I.Go to: Pete----------------We don't believe what we write, and neither should you. Informationfurnished to you is for topical (external) use only. This informationmay not be worth any more than either a groundhog turd, or what youpaid for it (nothing). The author may not even have been either saneor sober when he wrote it down. Don't worry, be happy.

Bob K 207 · Answer

op-From memory (~20 years) two stainless steels that are good for high temp (myapp is a WHOLE other story)310 & 446?

David Deuchar · Answer

800H or 310 should not flake. Try heating the steel once then cleaning it and then see if it is stable for further passes.Gold would be better though if you want oxide free.

corrosion resistant steel at 900C?

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