Tantalum
Tantalum is number 73 on the periodic table. It has a melting point
of 2996ºC and a density of 16.654 g/cc. Tantalum is one of the
refractory metals that offers a valuable combination of properties.
Tantalum and its alloys are midway between tungsten and
molybdenum in density and melting points. Tantalum can be
worked easily at room temperature.
Its thermal conductivity is one-fourth that of molybdenum, and its
coefficient of expansion is one-third greater. Its elevated
temperature strength is low compared with tungsten and
molybdenum.
Tantalum’s corrosion resistance is unusually good in most
commercial combinations of acids. Pure tantalum recrystallizes at
approximately 2200ºF (1204ºC).
Tantalum has several unique properties that have made it essential
to certain applications, making it well worth the high cost. It offers
approximately the same corrosion resistance to most acids and
caustics as glass.
In addition, tantalum is relatively easy to fabricate by bending, roll
forming, and welding by experienced personnel. Tantalum’s
ductility and density have made it popular with the military for
armor penetration. Its density and nuclear stability make it a
valuable material for containers of radioactive elements.
Physical Properties
Atomic Weight
180.95
Density
16.6 g/cc
Melting Point
2996ºC
Boiling Point
6100ºC
Coefficient of Thermal Expansion (20ºC)
6.5 x 10(-6)/ ºC
Electrical Resistivity (20ºC)
13.5 micro ohms-cm
Electrical Conductivity
13% IACS
Specific Heat
.036 cal/g/ºC
Thermal Conductivity
.13 cal/cm²/cmºC/sec
Tantalum is number 73 on the periodic table. It has a melting point
of 2996ºC and a density of 16.654 g/cc. Tantalum is one of the
refractory metals that offers a valuable combination of properties.
Tantalum and its alloys are midway between tungsten and
molybdenum in density and melting points. Tantalum can be
worked easily at room temperature.
Its thermal conductivity is one-fourth that of molybdenum, and its
coefficient of expansion is one-third greater. Its elevated
temperature strength is low compared with tungsten and
molybdenum.
Tantalum’s corrosion resistance is unusually good in most
commercial combinations of acids. Pure tantalum recrystallizes at
approximately 2200ºF (1204ºC).
Tantalum has several unique properties that have made it essential
to certain applications, making it well worth the high cost. It offers
approximately the same corrosion resistance to most acids and
caustics as glass.
In addition, tantalum is relatively easy to fabricate by bending, roll
forming, and welding by experienced personnel. Tantalum’s
ductility and density have made it popular with the military for
armor penetration. Its density and nuclear stability make it a
valuable material for containers of radioactive elements.
Physical Properties
Atomic Weight
180.95
Density
16.6 g/cc
Melting Point
2996ºC
Boiling Point
6100ºC
Coefficient of Thermal Expansion (20ºC)
6.5 x 10(-6)/ ºC
Electrical Resistivity (20ºC)
13.5 micro ohms-cm
Electrical Conductivity
13% IACS
Specific Heat
.036 cal/g/ºC
Thermal Conductivity
.13 cal/cm²/cmºC/sec
Robin Materials Inc
ISO 9001:2000
ISO 9001:2000
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