7 articles
Molybdenum
Molybdenum is a hard, silvery group 6 transition metal with the sixth highest melting point of any element, best known for strengthening steel and for its role in enzymes.
Niobium
Niobium, symbol Nb and atomic number 41, is a corrosion-resistant transition metal used chiefly to strengthen steel and in superconducting magnets for MRI scanners and accelerators.
Niobium alloys
Niobium alloys are metallic alloys based on niobium, a refractory metal with a melting point of 2477 °C, used in rocket nozzles, jet engines, superconductors, and medical implants.
Refractory metals
Refractory metals, usually niobium, tantalum, molybdenum, tungsten, and rhenium, are metals with melting points above 2,000 °C and resistance to softening at high temperatures, though they oxidize poorly; tungsten melts at 3,422 °C.
Rhenium
Rhenium is a rare, dense transition metal with atomic number 75, discovered in Germany in 1925 and used mainly in jet engine superalloys and refining catalysts.
Tantalum
Tantalum, symbol Ta and atomic number 73, is a rare, dense transition metal valued for corrosion resistance; its dominant use is in capacitors for portable electronics.
Tungsten
Tungsten, also known as wolfram, is a hard, steel-gray transition metal with the highest melting point of any metal, 3414 °C, best known for tungsten carbide tools and light bulb filaments.