MOLYBDENUM
|
PROPERTY |
@ 300K |
UNITS |
REFERENCES |
|
Density |
10.24 |
G/cm3 |
Mo1 Mo2 Mo3 |
|
Specific Heat |
0.0602 |
Cal/g-K |
Mo4 Mo5 Mo6 |
|
Thermal Conductivity |
0.334 |
Cal/cm-s-K |
Mo7 Mo8 Mo9 |
|
Thermal Exp Coef |
4.8 |
1/K |
Mo10 Mo11 Mo12 |
|
Melting Point |
2890 |
K |
Mo13 |
|
Resistivity 1 |
5.52x10-6 |
Ohm-cm |
Mo14 Mo15 Mo16 |
|
TCR (218K to 398K) |
4450 |
Ppm/K |
Mo14 Mo15 Mo16 |
|
Young’s Modulus |
4.63x107 |
psi |
Mo17 Mo18 Mo19 |
|
Poisson’s Ratio |
0.301 |
----- |
Mo17 Mo18 Mo19 |
|
Yield Strength 2 |
80 to 95 |
psi |
Mo20 Mo21 Mo22 |
|
Ult Tensile strength |
95 to 115 |
psi |
Mo20 Mo21 Mo22 |
|
Elongation at Break 2 |
1 to 8 |
% |
Mo20 Mo21 Mo22 |
|
Hardness |
160 |
Brinell |
Mo23 Mo24 Mo25 |
1: Molybdenum evaporated onto substrates held at temperatures between 450 and 675C in vacuums <2x10-7 torr produces films with resistivities in the range 6-11 micro-ohm centimeters. Films with thickness in the range of 6000 to 11000 angstroms have resistivities on the order of 0.1 ohms/square. [Mo26]
2: ASTM std. B 368-82. Properties are provided for matl 365( 99.97% pure) which has been stress relieved. Actual values depend on source, heat treatment and thickness. Cold work can increase strength to values greater than 20,000 psi. Cold work can also improve ductility. Recrystallization occurs between 900-1300C depending on the prior deformation. For a thorough review of the mechanical properties see “The Engineering properties of Molybdenum and Molybdenum alloys”, September 20, 1963, Battelle Metals Information Center, Columbus Ohio.