logo.gif (5139 bytes) Specialty Metals and Alloys

Back to Main
Back to Other Products Page
Back to the properties of these Specialty Metals and Alloys

MWS "Specialty Metals" cover a broad range of materials from high purity precious metals to high temperature refractory metals. When alloyed, these metals combine to create hundreds of materials with many unique physical, thermal, and electrical properties. Most of the metals and alloys shown below are available in wire, ribbon, foil, square and rectangular shapes.

Characteristics of Specialty Metals and Alloys

Material Material Characteristics
Niobium Also known as columbium, niobium has good resistance to chemical corrosion and has been used in applications where the extreme inertness of tantalum is not required and economy is important. Niobium is commonly alloyed with tungsten and tantalum to produce metals with excellent mechanical properties at high temperatures. When alloyed with titanium, niobium becomes useful in applications in the field of superconductors. As a result of its 2468C melting point, niobium is classified as a refractory metal
Platinum The platinum group of metals have many diverse uses in both high technology and commercial products. Some applications include electrical contacts, catalysts, glass sealing, thermocouple and resistance thermometer elements, electrodes, furnace windings, dental alloys, as well as water purification and food processing equipment. Platinum is classified as a precious metal.
Indium Indium is a semi-precious non-ferrous metal. It is silvery white with a brilliant metallic luster. In its pure state it is very soft and will stay workably ductile at low temperatures. Indium imparts desirable characteristics to solders, lubricants, seals, and electrical conductors. When alloyed with other metals it can make them harder, stronger and more resistant to fatigue, tarnishing or alkaline corrosion, while increasing the material's thermal and electrical conductivity.
Tungsten Used in a variety of lamp, electronic tube and electronic furnace applications, tungsten wire is supplied in a cleaned and straightened non-sagging condition or alloyed with thoria or rhenium. Pure tungsten's melting point is 3410C which is the highest of all metallic elements. Tungsten's extremely high tensile properties make it attractive for a variety of high temperature mechanical applications. Tungsten is classified as a refractory metal.
Rhenium As a result of rhenium's unique physical, electrical and thermal properties it is widely used in hundreds of commercial and aerospace applications. Specific applications include electronic tube components, electrical contacts, thermionic converters, thermocouples, heating elements and rocket thrusters. Classified as a refractory metal by virtue of its 3180C melting temperature, rhenium exhibits a unique group of properties when alloyed with tungsten or molybdenum at both room temperature and under cryogenic conditions.
Tantalum As a result of being a reactive material, tantalum cannot be used in the atmosphere above 500C as it readily reacts with oxygen. A protective atmosphere of argon,helium or a vacuum must be provided above 500C. Specific applications include electrodes, filament supports and anodes. When compared with metals other than platinum or gold, tantalum provides excellent resistance to an extreme wide range of corrosive substances. Tantalum is classified as a refractory metal.

Back to the properties of these Specialty Metals and Alloys
Back to Other Products Page
Back to Main Page