The last guitar I build, will be made from "Hastelloy X".
Application
Hastelloy X is recommended especially for use in furnace applications because it has unusual resistance to oxidizing, reducing, and neutral atmospheres. Furnace rolls made of this alloy were still in good condition after operating for 8,700 hours at 2150 °F (1177°C).
Alloy X also has performed well in jet engine tailpipes, afterburner components, cabin heaters, and other aircraft parts.
Oxidation Resistance
Hastelloy X is a nickel base alloy that possesses exceptional strength and oxidation resistance up to 2200°F. It has also been found to be exceptionally resistant to stress-corrosion cracking in petrochemical applications. The alloy has excellent forming and welding characteristics.
Maybe throw in an Inconel nut, and 306 SS bridge.