Best metal or metal alloy for expansion?
Best metal or metal alloy for expansion?
(OP)
Hello all. I am not a metal or materials expert and have a civil degree but I have been assigned a task to determine a material which can be used in the details described. Any suggestions would be greatly appreciated. Essentially I am trying to make an 0-ring approximately 6 inch diameter x 0.25" thick. I need something that can expand about 12% without losing its strength. Something malleable is ideal and will still hold an air tight seal after expansion. First thing that came to mind was gold, lead, zinc, or tin. Cost really isn't an issue.





RE: Best metal or metal alloy for expansion?
RE: Best metal or metal alloy for expansion?
How much movement of the joint and in what direction(s)?
How much pressure is "air tight" and for how long is the seal needed?
If the material - you imply metal! - expands once, does it need to keep sealing as it cools up and down in the future?
RE: Best metal or metal alloy for expansion?
RE: Best metal or metal alloy for expansion?
RE: Best metal or metal alloy for expansion?
You apparently don't want to re-machine the surface to a flat even substrate, probably for time and money reasons, right? At 150 deg F operating temperature, you "might" get away a plastic or resin or epoxy fill very, very carefully applied to the corroded area to make it smoother. (Then sand or polish. Again, better choice is machining it.) Then use a conventional soft o-ring.
But if it is going to go to 450 deg F?
RE: Best metal or metal alloy for expansion?
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The Help for this program was created in Windows Help format, which depends on a feature that isn't included in this version of Windows.
RE: Best metal or metal alloy for expansion?
RE: Best metal or metal alloy for expansion?
RE: Best metal or metal alloy for expansion?
It is better to have enough ideas for some of them to be wrong, than to be always right by having no ideas at all.
RE: Best metal or metal alloy for expansion?
It is better to have enough ideas for some of them to be wrong, than to be always right by having no ideas at all.
RE: Best metal or metal alloy for expansion?
RE: Best metal or metal alloy for expansion?