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Thanks

That little tungsten spring sure did puzzle the heck out of me. Annealed wire, dead soft, 99.99% pure. We could wind it, but as soon as you cut it, it would split, like the example above. Maybe someday someone will figure it out.

The stuff that really is interesting is a tantalum/tungsten alloy. It's used for extreme corrosion service - like boiling chlorine, for example - where even titanium does not survive. Decent strength, extreme corrosion resistance, maybe some high temp properties. Frightfully expensive, too