Nb3Sn superconductor

Niobium-tin (Nb3Sn) wire can be used in ITER(International Thermonuclear Experimental Reactor).

Niobium-tin (Nb3Sn) or triniobium-tin is a metallic chemical compound of niobium (Nb) and tin (Sn), used industrially as a type II superconductor. This intermetallic compound is an A15 phases superconductor. It is more expensive than niobium-titanium (NbTi), but can withstand magnetic field intensity values up to 30 teslas (T), whereas NbTi can withstand only up to roughly 15 T.

Superconductive wire of Nb3Sn can be made by "bronze route" or "internal tin" process.