Refractory Metals and Alloys | Supplied by EFINEA

EFINEA selection of refractory metals and alloys is among the most extensive in the industry today. Our inventory includes various forms and sizes of Molybdenum and Molybdenum Alloys to meet your application needs. When your fabrication demands a material that exhibits properties with high melting points, good strength at elevated temperatures, good thermal and electrical conductivity, low coefficient of expansion and low vapor pressure at elevated temperatures (e.g. furnace components, heat exchangers, coils, welding electrodes, etc.), we stock The Materials You Need, When You Need Them!


Molybdenum’s (Mo) unique properties give rise to processes and applications in electronics, aerospace, nuclear and heat treating industries which would not be possible with many of the more common metals and alloys. Some of the more noteworthy properties of Molybdenum relate to its high temperature strength, excellent thermal properties, good electrical conductivity, low coefficient of expansion and low vapor pressure at elevated temperatures.

Molybdenum Lanthanum Oxide

The addition of 0.3 to 0.7% in weight of Lanthanum Oxide particles to Molybdenum results in a fibrous stacked structure with improved properties over pure Molybdenum. Molybdenum Lanthanum Oxide or ML provides end-users with a significantly higher recrystallization temperature, stability in temperatures up to 2000°C, excellent creep resistance and dimensional stability even under extreme conditions of use.

Molybdenum TZM

Molybdenum TZM is an alloy of 0.40-0.55% Titanium, 0.06-0.12% Zirconium and 0.01%-0.04% Carbon with the balance Molybdenum. TZM Alloy is manufactured by powder metallurgy techniques (P/M) and is of great utility due to its high strength and high temperature applications, especially above 2000°F.

Niobium (aka Columbium)

Niobium (Nb), also termed Columbium, is a shiny grey metal that takes on a bluish tinge when exposed to air at room temperature. Due to its low capture cross-section for thermal neutrons, Niobium has application in the nuclear industry. Niobium can be electrically heated and anodized to a wide variety of colors that makes it very attractive in the jewelry industry.


Rhenium (Re) is one of the highest density elements and possesses the second highest melting point. Rhenium does not have a ductile to brittle transition temperature and does not form carbides. High resistivity, combined with low vapor pressure, it is an ideal material for filament applications. Excellent resistance to corrosion resists acid attack and the mechanical effects of electrical erosion. Re has a beneficial effect as an alloying addition with other refractory metals as it greatly enhances the ductility and tensile strength of these alloys.


Tantalum (Ta) is famous for its resistance to corrosion by acids.  In fact, below 150˚C, Tantalum is almost completely immune to corrosion by aqua regia. Due to its resistance to attack by body fluids, it provides an excellent material for medical devices. Another major use of Tantalum is for electronic components and due to its absorption properties, it is an excellent getter of residual gasses in evacuation tubes.


Many practical applications of Tungsten (W) are based on its high melting point and density and its low vapor pressure. Tungsten is an excellent material for high vacuum technology, dimensional stability, glass seals and furnace construction. In addition, Tungsten’s high density gives it a capacity to absorb radioactive radiation. Tungsten has found wide use as an additive to Steel to enhance physical properties and as an alloy with Nickel, Copper and Iron to provide high density machinable materials.

Tungsten Heavy Alloys (WHA)

Pure Tungsten combined with elements Nickel, Copper and Iron produces numerous Tungsten Alloys with superior engineering properties. These alloys are comparable to Steel in strength, are relatively easy to machine and can be plated or painted to enhance their corrosion protection. These alloys are approximately 50% denser than Lead resulting in a higher concentration of mass in a limited area.


EFINEA is a leading industrial supplier of certified, high-quality special purpose metals and alloys serving the needs of aerospace, aviation, defense, energy, electronics, medical, research, telecommunications and numerous high-technology industries.