Physical Properties


Physically Capable

Powder molybdenum appears as dark powder with a metallic luster and is derived through chemical processes from molybdic trioxide or ammonium molybdate.  Solid molybdenum, which is shaped from the raw powder, has a silvery-white appearance and is extremely hard to the touch, yet is more ductile than other refractory metals such as tungsten.  The material has an incredibly high elastic modulus, making it a popular choice for many manufacturing applications.  Molybdenum and its alloy family have a number of unique physical properties, such as high strength and resistance to expansion during conditions of elevated temperatures.

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Molybdenum Property & Value:

Atomic Number 42
Atomic Weight 95.94
Group Volume 9.41
Lattice Type Body Centered Cube
Natural Isotopes 92, 94, 95, 96, 97, 98, 100
Density at 20 °C 10.22 gr/cc
Melting Point 2610 °C
Boiling Point 5560 °C
Linear Coefficient of Thermal Expansion 4.9 x 10-6/°C
Thermal Conductivity .35 cal/cm2/cm
Specific Heat .061 cal/g/ °C
Electrical Conductivity 30% IACS
Electrical Resistivity at 20 °C 5.7 microhms-cm
Temperature Coefficient of Electrical Resistivity .0046 per °C (0 – 100°C)
Tensile Strength (20 º) 120,000 – 200,000 psi
Tensile Strength (500 °C) 35,000 – 65,000 psi
Tensile Strength (1000 °C) 20,000 – 30,000 psi
Modulus of Elasticity (20 °C) 46 x 106 psi
Modulus of Elasticity (500 °C) 41 x 106 psi
Modulus of Elasticity (1000 °C) 39 x 106 psi
Poisson’s Ratio 0.321
Spectral Emissivity (0.65μ wavelength) 0.37 (1000 °C)
Total Emissivity (at 1500 °C) 0.19
Total Emissivity (at 2000 °C) 0.24
Working Temperature 1600 °C and less
Recrystallization Temperature 900 °C – 1200 °C
Stress Relieving Temperature 800 °C