Hafnium is a hard, corrosion resistant metal that has similar properties to zirconium. Hafnium is nowhere produced for itself but only as a result of the purifying of zirconium for use in nuclear plant and equipment, where the lowest possible level of hafnium is required.
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Hafnium occurs in zirconium ores. Because this metal must be removed from “reactor grade” zirconium, the production of hafnium is largely dependent on zirconium production, as discussed later. Its melting point is 4032 F. However, it has not been available in sufficiently large quantities to have any extensive elevated-temperature applications other than in control rods […]
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