Propeties of 304 stainless at 2000 deg F
Propeties of 304 stainless at 2000 deg F
(OP)
I am working on a design of a basket used to melt aluminum flash and waste from a casting process from steel moulds. I have a plan in mind and leftover 304 ss bar from another job.
What I am looking for is the material properties of 304 at between 1800 and 2000 deg F. Overall weight is only a couple hunderd lbs but I would like to know with some confidence that there is still some strenght left in the material to hold the basket together at temperature. It would always be slow cooled.
What I am looking for is the material properties of 304 at between 1800 and 2000 deg F. Overall weight is only a couple hunderd lbs but I would like to know with some confidence that there is still some strenght left in the material to hold the basket together at temperature. It would always be slow cooled.





RE: Propeties of 304 stainless at 2000 deg F
I have a little experience with 304 Stainless used at approx 1800ºF, but it was extremely weak at those temperatures. Another 200ºF would concern me. 304 is generally not recommended above 1700°F, but we were able to push it to 1800°F semi-successfully.
309 or 310 might be a better choice, if those are an option.
Check out:
http://www.azom.com/details.asp?ArticleID=1175
-Tony Staples
www.tscombustion.com
RE: Propeties of 304 stainless at 2000 deg F
RE: Propeties of 304 stainless at 2000 deg F
Cast iron in a better option.
There are no resonable cost alloys with any significant strength at these temps.
Have you considered refractories?
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RE: Propeties of 304 stainless at 2000 deg F
RE: Propeties of 304 stainless at 2000 deg F
Don't let molten aluminum splash on the metal. Molten Al acts like the Universal Solvent and will go through nickel alloys like, well, hot water through snow.
James Kelly
James Kelly
www.rolledalloys.com
RE: Propeties of 304 stainless at 2000 deg F
"design of a basket used to melt aluminum flash and waste from a casting process"
So, why are 1800-2000 oF properties needed?
CalvinKelly is absolutely correct about liquid Al attacking Ni-containing alloys, although depending upon conditions, it may be more like arthritis (formation of a skeleton of very strong but brittle aluminide AlNi, like Raney catalysts).
I recall using yttria- and zirconia- brush on coatings from ZYP to protect graphite, clay graphite & cast iron crucibles & molds when melting & casting aluminum. Also, fluxing/degassing tablets used with molten aluminum are incompatible with stainless. Maybe post a question on melting aluminum in the Metallurgy forum, as swall & others there have lots of experience.
RE: Propeties of 304 stainless at 2000 deg F
Cr 24-27%, Ni 3% min, C 0.2-0.6%, Mn 0.6-1.0%, Si 0.8-1.1%, Va 0.4-0.6% and Mo 0.1% min.
This crucible has a life of 9 months and is then replaced. No welding repair is possible.