Our materials

Special Metals

Tantalum, Hafnium, Zirconium, Vanadium, Niobium, Rhenium

Composition 
Tantalum 
(Ta 99.95%)
Tantalum Niobium (TaNB)
Applications
Nuclear and petroleum industries, medical sector
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tantalum
Tantalum
Tantalum is a shiny silvery metal that is heavy, dense, malleable and ductile when pure.

Tantalum is extremely resistant to corrosion due to the formation of an oxide film.

It is also resistant to attack by acids (except hydrofluoric acid).

It reacts with molten bases and various non-metals at high temperatures.

Tantalum can be used as a substitute for platinum in laboratory equipment requiring high corrosion resistance.
This metal is also used in the chemical industry for similar reasons.

Fluids in the human body do not react with metal and therefore it is used for surgical implants without risk of rejection.
Pure metal is used in the electronics industry for the production of various types of electronic equipment (rectifiers, capacitors, lamp filaments, etc.).

Tantalum is also used in vacuum systems due to its high residual gas absorption rate.

It is also used as an alloying element with, for example, nickel and molybdenum, to produce alloys that have high resistance to corrosion, high strength and good ductility.
TANTALUM NIOBIUM
Niobium is almost always found associated with tantalum.

Niobium has many uses, some of which are shared with other refractory metals.

It can be annealed to obtain better elastic strength. It is the least dense of the refractory metals. It can be used in electrolytic capacitors and in superconducting alloys.

It is also found in aircraft gas turbines, electronic tubes and nuclear reactors.
Composition 
Hafnium (Hf 99.95%)
Applications
Nuclear, maritime industries
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hafnium
Hafnium
Hafnium is a bright silvery ductile metal. It resists corrosion and is chemically similar to zirconium. Hafnium is mainly used in the neutron control systems of nuclear reactors and in submarines, in particular because of its very high neutron absorption capacity (its absorption capacity is about 600 times that of zirconium). In addition, it has strong mechanical properties and excellent corrosion resistance.
Composition 
Zirconium
(Zr 99.95%)
Applications
Nuclear and chemical industries
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zirconium
Zirconium
Le zirconium est un métal dur de couleur argenté et satiné.

Le zirconium est un métal spécialement résistant à la corrosion par l'eau et l'eau de mer ce qui, associé à ses caractéristiques nucléaires, permet son utilisation comme matériau du gainage des combustibles.

Les propriétés chimiques du zirconium sont très similaires à celles du hafnium. Par conséquent, les procédés chimiques normaux utilisés pour l'exploitation du zirconium ne supprimeront pas le hafnium, qui peut être présent dans les qualités commerciales du zirconium à des niveaux aussi élevés que 4,5%.

Du fait de sa résistance à la corrosion le zirconium est très utilisé dans l'industrie chimique où sont utilisés des agents corrosifs. Le métal pur est également utilisé comme revêtement des moteurs à réaction

Le zirconium est utilisé pour protéger la paroi intérieure de fours et de réacteurs (chimiques): fabrication de creusets de fonderie, de briques et d'abrasifs.
Composition 
Vanadium
(V 99.95%)
Applications
Nuclear and chemical industries
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vanadium en barre
Vanadium
A white shiny metal, vanadium is also ductile and hard. It is not very susceptible to corrosion by alkali compounds, hydrochloric acid or sulfuric acid. It interacts less than other metals with neutrons from nuclear fission. It is both acidic and basic.

It is used for electricity storage in flux batteries. Some surgical steels contain vanadium. Vanadium blue contains this metal as a pigment. In compound form, it catalyzes the synthesis of sulfuric acid or maleic anhydride. Vanadium is also found in association with aluminum and Titanium in some jet engines.
Composition 
Niobium
Nb (99.95%)
Applications
Nuclear and chemical industries
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niobium pur et transformé
NIOBIUM
Niobium comes in the form of a shiny grey metal. Its hue changes to blue when it is exposed to the air long enough. It shares with tantalum (the element below it in the Periodic Table of Elements) almost all of its chemical properties. Above 200°C, niobium oxidizes in the presence of air.

Niobium is an alloying agent that gives considerable properties to the materials to which it is added. For example, steel containing niobium resists corrosion and is stronger and lighter than pure steel. Niobium is found, among other things, in rockets and satellites sent into space.
It is also alloyed with zirconium, molybdenum, vanadium, chromium or tungsten.

Along with gold, niobium is the only metal that can be cold forged by craftsmen. Its coloring by anodizing is similar to that of other refractory metals such as titanium.

Other applications:
Surface wave filters
Filler metal for arc welding

It is used for the storage of electricity in flux batteries. Some surgical steels contain vanadium. Vanadium blue contains this metal as a pigment. In compound form, it catalyzes the synthesis of sulfuric acid or maleic anhydride. Vanadium is also found in association with aluminum and titanium in some jet engines.
Composition 
Rhenium
(Re 99.95%)
Applications
Nuclear and chemical industries
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Rhenium
Rhenium
Rhenium is a silvery metal that resists corrosion well and has exceptional heat tolerance. Its specificity is that it is not attacked by hydrochloric or sulfuric acid. However, it dissolves in nitric acid.

Rhenium has few applications, owing to its scarcity and high production costs (in 2013 its estimated price was $3,200/kg, in the form of 99.99% pure pellets), but its use in aeronautics is strategic. It is usually extracted from molybdenumdusts in industrial furnaces, of which it is a grey powdery by-product, but rhenium is also found in trace amounts in some minerals.

Rhenium is used to improve the thermal resistance of filaments in electric furnaces, in the production of thermocouples and as a catalyst in the chemical industry.

Nuances de Tantale, Hafnium et Zirconium

GradeFamilyDensity
Tantalum (Ta)TANTALUM16,6
Niobium (Nb)NIOBIUM8,6
Tantalum Niobium (TaNB)TANTALUM8,6
Hafnium (Hf)HAFNIUM13,3
Vanadium (V)VANADIUM6
Zicornium (Zr)ZICORNIUM6,52
Rhenium (Re)RHENIUM20,8
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