View source for Category:Refractory metals

Refractory metals are a class of transition metals that have extraordinary resistence to heat and wear. The class consists of five elements: niobium, molybdenum, tantalum, tungsten, and rhenium; though some definitions also include the fourth group metals (titanium, zirconium, hafnium), vanadium, chromium and the platinum metals from the 8th and 9th group.

[[Category:Transition metals]]