Thermal conductivities of various materials at 77 F temperature
Material BTU/ft2 /ft hr oF
Air |
0.014 |
Aluminum |
145 |
Asphalt |
0.43 |
Brick dense |
0.76 |
Brick work |
0.40 |
Carbon dioxide |
0.0084 |
Cement, portland |
0.17 |
Cement, mortar |
0.99 |
Chalk |
0.05 |
Chrome Nickel Steel (18% Cr, 8 % Ni) |
9.4 |
Clay, dry to moist |
0.0.086 - 1.04 |
Clay, saturated |
0.34 – 1.44 |
Concrete, light |
0.24 |
Concrete, stone |
0.98 |
Copper |
231 |
Cork |
0.04 |
Cotton |
0.017 |
Earth, dry |
0.87 |
Fiberglass |
.023 |
Glass |
0.61 |
Gold |
179 |
Granite |
0.98 – 2.3 |
Ice (0oC, 32oF) |
1.26 |
Iron |
46.2 |
Limestone |
0.72 - 1.02 |
Mercury |
4.6 |
Mineral insulation materials, wool blankets .. |
0.023 |
Oil, machine lubricating SAE 50 |
0.09 |
Olive oil |
0.098 |
Oxygen |
0.0138 |
Polyethylene HD |
0.24- 0.29 |
PVC |
0.109 |
Quartz mineral |
1.7btu |
Rock, porous volcanic (Tuff) |
0.29 – 1.44 |
Sand, dry |
0.09 - 0.14 |
Sand, moist |
0.14- 1.15 |
Sand, saturated |
1.15 – 2.3 |
Sandstone |
0.98 |
Sawdust |
0.046 |
Silver |
248 |
Snow (temp < 0oC) |
0.029 - 0.14 |
Soil, with organic matter |
0.09 – 1.15 |
Soil, saturated |
0.35 – 2.31 |
Styrofoam |
0.019 |
Vermiculite |
0.033 |
Water |
0.33 |