Molybdenum
Molybdenum is number 42 on the periodic table. With a melting
point of 2610ºC, molybdenum has a density of 10.22 g/cc. It has
many properties that make it an excellent candidate for fabricated
parts that must be made of a refractory metal.
Molybdenum has been used for many years in the lamp industry
for mandrels and supports, usually in wire form. Today, several
unique properties of molybdenum that satisfy more demanding
industry requirements have increased the use of molybdenum as a
material in applications requiring other mill forms.
Machining
Pressed and sintered, or recrystallized molybdenum machines
very much like medium hard cast iron. Wrought molybdenum
machines similar to stainless steel.
The machining characteristics of molybdenum differ basically from
those of medium hard cast iron or cold rolled steel in two ways:
· It has a tendency to break out on the edges when cutting tools
become dull;
· It is very abrasive and causes tools to wear out much faster
than steel. Once the expected tool life has been established for a
particular operation, establishing a program of scheduled tool
replacement will permit maximum machining efficiency.
Only minor variations were found between the machinabilities of
arc-cast molybdenum and that produced through powder
metallurgy.
Physical Properties
Atomic Number
42
Atomic Weight
95.94
Density (20ºC)
10.22 g/cc
Melting Point
2610ºC
Coefficient of Thermal Expansion (20ºC)
4.9 x 10(-6)/ ºC
Electrical Resistivity (20ºC)
5.7 micro-ohms-cm
Electrical Conductivity
30%IACS
Specific Heat
.061 cal/g/ºC
Thermal Conductivity
.35 cal/cm²/cmºC/sec
Modulus of Elasticity (20ºC)
46 x 10(6) psi
Molybdenum is number 42 on the periodic table. With a melting
point of 2610ºC, molybdenum has a density of 10.22 g/cc. It has
many properties that make it an excellent candidate for fabricated
parts that must be made of a refractory metal.
Molybdenum has been used for many years in the lamp industry
for mandrels and supports, usually in wire form. Today, several
unique properties of molybdenum that satisfy more demanding
industry requirements have increased the use of molybdenum as a
material in applications requiring other mill forms.
Machining
Pressed and sintered, or recrystallized molybdenum machines
very much like medium hard cast iron. Wrought molybdenum
machines similar to stainless steel.
The machining characteristics of molybdenum differ basically from
those of medium hard cast iron or cold rolled steel in two ways:
· It has a tendency to break out on the edges when cutting tools
become dull;
· It is very abrasive and causes tools to wear out much faster
than steel. Once the expected tool life has been established for a
particular operation, establishing a program of scheduled tool
replacement will permit maximum machining efficiency.
Only minor variations were found between the machinabilities of
arc-cast molybdenum and that produced through powder
metallurgy.
Physical Properties
Atomic Number
42
Atomic Weight
95.94
Density (20ºC)
10.22 g/cc
Melting Point
2610ºC
Coefficient of Thermal Expansion (20ºC)
4.9 x 10(-6)/ ºC
Electrical Resistivity (20ºC)
5.7 micro-ohms-cm
Electrical Conductivity
30%IACS
Specific Heat
.061 cal/g/ºC
Thermal Conductivity
.35 cal/cm²/cmºC/sec
Modulus of Elasticity (20ºC)
46 x 10(6) psi
Robin Materials Inc
ISO 9001:2000
ISO 9001:2000
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