text: Niobium–tin is an intermetallic compound of niobium (Nb) and tin (Sn), used industrially as a type-II superconductor. This intermetallic compound has a simple structure: A3B. It is more expensive than niobium–titanium (NbTi), but remains superconducting up to a magnetic flux density of , compared to a limit of roughly 15 T for NbTi.
  NbSn was discovered to be a superconductor in 1954. The material's ability to support high currents and magnetic fields was discovered in 1961 and started the era of large-scale applications of superconductivity.
  The critical temperature is . Application temperatures are commonly around , the boiling point of liquid helium at atmospheric pressure.
  In April 2008 a record non-copper current density was claimed of 2,643 A mm at 12 T and 4.2 K.