Rhenium is a silvery white metal. The hexagonal lattice with a = 27546 a, C = 44480 a.
The melting temperature is only slightly lower than the melting point of tungsten.
Pure metals have high plasticity. The rhenium stack produced by the cermet process similar to tungsten can be forged when heated to 800 ℃.
It is stable in air at ordinary rhenium temperature. When the metal is heated to 1000 ℃, obvious oxidation can be observed. Powdered rhenium is easy to burn in air and produce volatile Re2O7 oxide. Rhenium does not produce chemical compounds with nitrogen and hydrogen. The latter is buried in powdered metal. Halide reacts with grey rhenium when heated.
Rhenium does not corrode in hydrochloric acid and molten acid. Sulfuric acid has little effect on metals when heated to 100 ℃. Rhenium acid can be dissolved in rhenium nitrate.
The standard rhenium potential is 0.6 W.