Hafnium

Product Overview

Hafnium (Hf), 99.5%HF (2n5), 99.9%Hf (3N)

Eagle Alloys Corporation (EAC) is a leading global supplier of Hafnium (Hf) in foil, strip, sheet, plate, discs, wire, rod, bar, blanks, pipe, tubing, fittings, crucibles, sputtering targets as well as semi-finished and finished parts, custom sizes, and custom grades. Eagle Alloys Corporation is an ISO Certified Corporation and has been supplying the highest quality Hafnium for over 35 years. If Eagle Alloys can offer custom made Hafnium products at competitive pricing with short lead times.

Eagle Alloys Hafnium Capabilities

Form
Size Range
Max Size
Foil / Sheet / Strip / Plate:
0.001" Thk up to 4" Thk
24" max width, 60" max length
Wire / Rod / Round Bar:
0.003" Dia up to 10" Dia
20ft length *Wire avail in coils or spools
Tubing:
0.250" OD up to 5" OD; 0.020-0.800" Wall
8 ft. max length
*Custom sizes upon request

Hafnium

About Pure Hafnium Metal (Hf) and Hafnium Alloys

Hafnium is a lustrous, silvery, ductile metal generally similar to zirconium. Good corrosion resistance and high strength. It resists corrosion due to formation of a tough, impenetrable oxide film on its surface. The metal is unaffected by alkalis and acids, except hydrofluoric acid. Hafnium is difficult to separate form zirconium, because the two elements have atoms that are the same size.  Hafnium and its alloys are used for control rods in nuclear reactors and nuclear submarines because hafnium is excellent at absorbing neutrons and it has a very high melting point and is corrosion resistant. It is used in high-temperature alloys and ceramics, since some of its compounds are very refractory: they will not melt except under the most extreme temperatures.

Hafnium (atomic symbol: Hf, atomic number: 72) is a Block D, Group 4, Period 6 element with an atomic weight of 178.49. The number of electrons in each of Hafnium’s shells is 2, 8, 18, 32, 10, 2 and its electron configuration is [Xe] 4f14 5d2 6s2. The hafnium atom has a radius of 159 pm and a Van der Waals radius of 212 pm. Hafnium was predicted by Dmitri Mendeleev in 1869 but it was not until 1922 that it was first isolated Dirk Coster and George de Hevesy.

In its elemental form, hafnium has a lustrous silvery-gray appearance. Hafnium does not exist as a free element in nature. It is found in zirconium compounds such as zircon. Hafnium is often a component of superalloys and circuits used in semiconductor device fabrication. Its name is derived from the Latin word Hafnia, meaning Copenhagen, where it was discovered. Above data is for informational purposes only.  Eagle Alloys is not liable for accuracy of these contents or applications. Finished part drawings may be forwarded to a third party for outsourcing.

Properties & Applications

Hafnium Typical Applications

Hafnium Specifications (upon request)

Eagle Alloys supplies DRC Conflict Free material only.

Hafnium Physical Properties

Symbol:
Hf
Atomic Number:
72
Atomic Weight:
178.49
Density:
13.31 gm/cc
Melting Point:
2227°C
Boiling Point:
4602°C
Thermal Conductivity:
.230 W/cm/°K @298.2°K
Electrical Resistivity:
35.1 microhm-cm @ 25°C
Electronegativity:
1.3 Paulings
Specific Heat:
.035 Cal/g/°K @ 25°C
Heat of Vaporization:
155 K-Cal/gm atom at 4602°C
Heat of Fusion:
6.0 Cal/gm mole
Thermal Neutron Cross Section:
115 Barns

Common Industry Applications

STATEMENT OF LIABILITY - DISCLAIMER Any suggestion of product applications or results is given without representation or warranty, either expressed or implied. Without exception or limitation, there are no warranties of merchantability or of fitness for particular purpose or application. The user must fully evaluate every process and application in all aspects, including suitability, compliance with applicable law and non-infringement of the rights of others Eagle Alloys Corporation and its affiliates shall have no liability in respect thereof.

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Contact Eagle Alloys

Toll Free: 800.237.9012
Local: 423.586.8738
Fax: 423.586.7456

Email: sales@eaglealloys.com

Company Headquarters:
178 West Park Court
Talbott, TN 37877

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