Good corrosion resistance. Forms superconducting alloy with tin. Low neutron capture cross-section. Very low ductile-brittle transition temperture, except when highly alloyed. Limitations are that it is marginally less corrosion resistant than tantalum, but economies may lead to increased use at the latter's expence.
Applications are in gas and turbine rocket moters- high temperature parts.
Has been used for cans for reactor fuel. The metal is a soft, opaque, dark gray graphite-like material. The USA has been the chief producer since 1952. High Young's modulus. Resistant to mineral acids, unless oxidising agents are present.