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Symbol: Hf
Atomic number: 72
Atomic weight: 178.49
Boiling Point: 4450°C (8042.0F) to 4602.0 (8315.6F)
Melting Point: 2207°C(4004.6F) to 2503.0°C(4537.4F)
Density : 13.31 g/cm3 at 20.0°C (68.0 F)
Hafnium is a shiny, silvery, ductile metal that is corrosion-resistant and chemically
similar to zirconium. Its properties are influenced considerably by the impurities of
zirconium present. Of all the elements, zirconium and hafnium are two of the most
difficult to separate.
Because hafnium has a good absorption cross section for thermal neutrons (almost 600
times that of zirconium), has excellent mechanical properties, and is extremely
corrosion resistant, it is used for nuclear reactor control rods. And hafnium is also
used in filaments, electrodes, and the 45nm fabrication process for integrated
circuits.
Chemical Composition for hafnium pipe
Chemical Composition (PPM) | |||||||||||
Hf |
Al |
Nb |
Cr |
Cu |
Co |
Mn |
Si |
Fe |
C |
N |
O |
Top Remainder |
<10 |
<30 |
<10 |
<20 |
<5 |
<10 |
<25 |
<20 |
17 |
<10 |
249 |
Hf |
Ni |
Pb |
Ti |
Sn |
P |
U |
Zr |
V |
Mg |
/ |
/ |
Top Remainder |
<10 |
<10 |
<10 |
<30 |
<5 |
<2.5 |
6900 |
<10 |
<10 |
/ |
/ |
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