Thermal Conductivity

MaterialThermal conductivity
(cal/sec)/(cm^2 C/cm)
Thermal conductivity
(W/m K)*
Silver
1.01
406.0
Copper
0.99
385.0
Brass
...
109.0
Aluminum
0.50
205.0
Iron
0.163
...
Steel
...
50.2
Lead
0.083
34.7
Mercury
...
8.3
Ice
0.005
1.6
Glass,ordinary
0.0025
0.8
Concrete
0.002
0.8
Water at 20 C
0.0014
...
Asbestos
0.0004
...
Hydrogen at 0 C
0.0004
0.14
Helium at 0 C
0.0003
0.14
Oxygen
...
0.023
Snow (dry)
0.00026
...
Fiberglass
0.00015
0.04
Brick,insulating
...
0.15
Brick, red
...
0.6
Cork board
0.00011
0.04
Wool felt
0.0001
0.04
Rock wool
...
0.04
Styrofoam
...
0.01
Wood
0.0001
0.12-0.04
Air at 0 C
0.000057
0.024
*From Young, Hugh D., University Physics, 7th Ed. Table 15-5.
Heat conduction discussion
Debye Temperature and Thermal Conductivity
 Index

Tables

Reference
Young
Ch 15.
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Wiedemann-Franz Ratio

The ratio between thermal and electrical conductivities of metals can be expressed in terms of the ratio:

which may be called the Wiedemann-Franz Ratio or the Lorenz constant.

Metalk/sT (10-8WW/K2)
Cu
2.23
Ag
2.31
Au
2.35
Zn
2.31
Cd
2.42
Sn
2.52
Mo
2.61
Pb
2.47
Pt
2.51
Heat conduction discussion
Wiedemann-Franz Law
 Index

Tables

Reference
Blatt
Section 13.2
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