TUNGSTEN
|
PROPERTY |
@ 300K |
UNITS |
REFERENCES |
|
Density |
19.3 |
G/cm3 |
W1 W2 W3 |
|
Specific Heat |
0.03169 |
Cal/g-K |
W4 W5 W6 |
|
Thermal Conductivity |
0.425 |
Cal/cm-s-K |
W7 W8 W9 |
|
Thermal Exp Coef |
4.5x10-6 |
1/K |
W10 W11 W12 |
|
Melting Point |
3683 |
K |
W13 |
|
Resistivity |
5.44x10-6 |
Ohm-cm |
W14 W15 W16 |
|
TCR (218K to 398K) |
4290 |
Ppm/K |
W14 W15 W16 |
|
Young’s Modulus |
5.939x107 |
psi |
W17 W18 W19 |
|
Poisson’s Ratio |
0.280 |
----- |
W17 W18 W19 |
|
Yield Strength 1 |
------ |
psi |
W20 W22 W23 |
|
Ult Tensile strength |
80-100 |
psi |
W20 W21 W22 |
|
Elongation at Break 1 |
0 |
% |
W20 W21 W22 |
|
Hardness |
351 |
Brinell |
W24 W25 W26 |
1: Fully recrystallized tungsten demonstrates very little permanent deformation room temperature. There is therefore no true yield strength among the range of 80-100 ksi has been reported. At higher temperatures, tungsten undergoes sufficient plastic deformation to exhibit a yield strength.
Mechanical properties are for fully recrystallized, bulk material. Wrought material has significantly higher strengths then those listed. For additional information see the graphs of Mechanical – v- temperature.
Like most bcc metals, the mechanical properties are strongly affected by the interstitial composition. Material consolidated from powder with 50 wppm oxygen has ½ with the yield strength and 2/3 the tensile strength of material with 4 wppm oxygen.