Hi,

I am looking for a high temperature Polyethylene (HDPE, UHMW, PEX,  HDXLPE or other high hydrogen containing material).


4.55" OD x 3.90" ID or ~0.325 thick (could be extruded, made with "welded" sheet or machined from bar)

Will be used in a vertical orientation.

Non-structural static application (needs only to support its own weight and NO differential pressure)

Environment: Dry Nitrogen at 1 Atm, contained within a titanium or aluminum tube.
 Temperature:  Normal:   120°F  
               Abnormal  260°F (127°C) for up to 35 days
Cracking  / Splitting is allowed        
Any color                

I would greatly appreciate any input on any material satisfying the above conditions?

  

Any PE will struggle even supporting its own weight at 127 deg C

Polypropylene should do it.

Nylon might do even better but is probably over the top

Regards
Pat
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If you need a hydrocarbon polymer then PP is a great choice. If you needed higher temperature then COC (Topas) would work (much more expensive though).

Now I read your post more carefully, why not PE? It says it's contained in a metal tube so it wouldn't matter if it's a bit soft.

Chris DeArmitt PhD FRSC CChem

www.phantomplastics.com
Consultant to the plastics industry