Niobium, also known as columbium, is a chemical element with the symbol Nb (formerly Cb) and atomic number 41.


Niobium is a chemical element with chemical symbol Nb (formerly columbium, Cb) and atomic number 41. It is a light grey, crystalline, and ductile transition metal. It was not until the early 20th century that niobium was first used commercially. Niobium is an important addition to high-strength low-alloy steels.


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