Definitions for "niobium"
The chemical element of atomic number 41. Chemical symbol Nb. Atomic weight 92.91. Previously called columbium. See also Columbium.
Known as columbium in the USA. A strong carbide forming alloying element in steel. Present in amounts up to 0.1% in high strength low alloy (microalloyed) structural steel and used in stabilised grades of austenitic stainless steel. Can also be used as a stabilising element in ultra low carbon (ULC) steels.
A white superconductive metal. Atomic Number 41 Chemical Symbol "Nb". Melting point 2468oC Chemically inert and thus suitable for piercing.
Keywords:  obverse