Hi everyone
I need to determine the thermal conductivity of the 5083 and 5754 alloys of aluminium with temperature from 25 °C to 500 °C. I am building heat transfer models, which require this data.
Do you perhaps know of reliable sources with this information?
Many thanks
Johan
Hello Johan,
I found the following values:
AW 5083: 100 - 140 W/mK
AW 5754: 140 - 160 W/mK
Look the data sheets .
With Regards
R. Mitdank
Hi Rüdiger Mitdank
Thanks for the help. I have indicative values as well, but I'm still looking for tabulated values of thermal conductivity vs temperature.
All the best
Johan
Hello Johan,
I recommend to apply the "Wiedemann-Franz-law" to estimate the temperature dependence of your material. This law is valid for metals:
lambda = sigma*T*L
with lambda the thermal conductivity, sigma the electrical conductivity, T the temperature and L the Lorentznumber.
L = 2,45E-8 (V/K)2
The temperature dependence of the electrical conductivity is easy to determine. I expect a decrease of sigma with increasing T due to electron-phonon scattering. So, lambda only weak depends on T.
R. Mitdank
Thank you so much, Rüdiger Mitdank. That would be a very sensible way of doing it. I will follow your recommendation.
All the best
Johan
Hellow Johan
The conductivity of the Al alloy in this rang of temperature is between 198 w/m *C and 208 W/m*C
Best regards
Eduardo Diaz del Rio
Hi,
For Aluminium 5083, maybe it is possible to extrapolate from this correlation
https://www.nist.gov/mml/acmd/aluminum-5083-o-uns-a95083
Regards,
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