Adamantium

Adamantium is a metamaterial created thanks to the technical data recovered from the Crypts of Vigilance, which has took the world of engineering (both conventional and space one) by storm. Ever since its discovery, the demand for adamantium outmatched its supply, and that's despite the supply constantly growing.

Properties

Physical & Chemical Properties

Adamantium is notable for possessing multiple incredible characteristics where it remains unchallenged by any other materials known to Man. It's melting point is 6450C, which is far more than any other material. Its physical resistance is incredible - even in the age of synthetic materials, there is nothing that comes close.
In fact, both this and its tensile strenght go so far that it should be capable of forming a framework of a ring world and withstanding the subsequent stress. It also doesn't become brittle unless cooled to -272C.
It's also immensely resistant to acids and bases. In fact, it is immensely resistant towards almost every compound known to man, as they simply refuse to cause any sort of chemical reaction when exposed to those. Adamantium is often noted to share this trait with the noble gasses.
It's also nearly impervious to radiation thanks to its high density and estimated atomic number. In the exchange for that, with its density of about 32 g/cc it's extremely heavy. This becomes a problem while trying to lift shipments of adamantium up to the orbit of a world with a non-negligible gravity.

Compounds

Adamantium is an alloy requiring immense ammounts of titanium, tungsten, osmium, iridium, rhenium and plutonium fused together through a number of metaphysical processes requiring a heavy gravity (>2g) environment to work properly.

History & Usage

Industrial Use

Adamantium, thanks to its immense resistance, is used to create hull structure and armor of warships and space stations. This massively increases not just resistance to physical impacts but also survivability of the hulls - even if the crew is killed and the hull is severely destroyed, it's surprisingly common for the main hull structure made of adamantium to remain mostly untouched, which in turns make it much easier to repair such ships.
Worst case scenario, you can just scrap the rest and reconstruct everything from the adamantium skeleton up.
Its extreme weight makes it problematic to apply adamantium to personal armors, even powered ones. There are cases of adamantium plates installed into armors of heavy tanks, defending at least the most critical parts of the vehicle.
It was also used for large-scale planetary engineering. Using adamantium rebars can massively improve the bearing strength of walls allowing for much taller buildings. Aside from more prestigious constructions, however, the value of adamantium makes its inclusion rather rare.

Color

Dark Orange

Density

32 g/cc