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Pellets are the industry standard commercial form for rhenium metal. They are used as an alloying additive in nickel-based superalloys and are indispensable for the manufacture of single-crystal turbine blades in aircraft engines and industrial gas turbines. Rhenium pellets meet the stringent qualification requirements of the aerospace industry.
Rhenium powder is produced by hydrogen reduction of ammonium perrhenate and is traded in fine grain sizes. It is used as a starting material for powder metallurgical processes and as an alloying component for tungsten-rhenium and molybdenum-rhenium alloys. These alloys are primarily used in high-temperature thermocouples that can reach temperatures of up to 2,300 °C.
Ammonium perrhenate (NH₄ReO₄, APR for short) is the most important rhenium compound in industrial trade. It is available as a white, readily water-soluble crystal powder and contains around 69.4 % rhenium. APR serves as a precursor for the production of rhenium powder and pellets and is also a direct starting material for platinum-rhenium catalysts, which are used in oil refineries to increase the octane number.
Purity grade 3N is the industrial standard for the vacuum melting process. It is approved by the leading aerospace manufacturers for use in nickel-based superalloys and covers most of the global demand for rhenium.
Purity grade 4N is used for more demanding applications where a lower metallic impurity content is required. Typical applications include the production of tungsten-rhenium and molybdenum-rhenium alloys as well as powder metallurgical processes with narrow purity tolerances.
Purity grade 5N is a special grade for research applications and high-precision processes in which even minor impurities can affect the material properties. It is available in significantly smaller quantities and is correspondingly more cost-intensive.
A rhenium content of at least 69.2 % corresponds to the catalyst grade and is the industrial standard for APR. This purity level is suitable for the direct production of platinum-rhenium reforming catalysts and as a precursor for the production of rhenium powder and pellets. Complete water solubility is a key quality feature for uniform catalyst impregnation.
TRADIUM supplies industrial customers with suitable rhenium for superalloys in the aerospace industry, for high-temperature alloys and for catalytic applications in oil refineries - flexible, high-quality and reliably available thanks to large stocks.