There is also a basic version of this calculator
This calculator produces thermal conductivity values for pure aluminium
and aluminium alloys over the temperature range from 1 to 300 K based on a supplied value. Please enter a value in one of the four fields
below. The temperature range values may also be modified.
A description of how this operates is given here, and in more detail in Reference 
For pure aluminium, this calculator uses equations from Ref. .
For alloys (RRR<10),
equations from Ref.  are used.
The results should be valid for samples with RRR between 2 and 10 000; this includes the majority of commercial aluminium alloys. It is likely that the results are also appropriate for RRR values outside this range. They only apply in the normal state; in the absence of a magnetic field pure aluminium goes superconducting at 1.2 K, and alloys at temperatures varying from below 400 mK to at least 1.4 K.
Values are generated for the equivalent residual resistivity ratio, RRR* . This can be considered to be equal to the RRR for RRR>=10.
This page is currently in an experimental state. Although the results have been checked, if you are using them for anything important, please check them yourselves (using Ref.  perhaps).
I would appreciate reports of any problems (contact details given here.)