| |
| |
Thermal Conductivity of Materials at 20o
C |
|
|
Material |
Conductivity |
Material |
Conductivity |
|
|
Cast
iron |
51.9 |
Bronze (75 - 25) |
26.0 |
|
Aluminium |
204 |
Lead |
34.6 |
|
Duralumin |
164 |
Mercury |
8.7 |
|
Magnesium |
171 |
Nickel |
90 |
|
Copper |
386 |
Silver |
407 |
|
Brass
(70 - 30) |
111 |
Zinc |
112 |
|
Constantan |
22.7 |
Tin |
64 |
|
Tungsten |
163 |
Glasswool |
0.04 |
|
Glass |
0.762 |
Loose
cork |
0.036 |
|
Bakelite |
0.232 |
Loose
earth |
0.521 |
|
Concrete |
0.8
- 1.4 |
Silk |
0.036 |
|
Gypsum plaster |
0.485 |
Engine oil |
0.145 |
|
Common brick |
1.32 |
Freon
- 12 |
0.073 |
|
Facing brick |
0.32 |
Water |
0.597 |
|
Cotton |
0.059 |
Methyl chloride |
0.163 |
| |
|
| |
| Thermal Conductivity of Steel at
20o C (W/mk) |
|
|
Steel |
Conductivity |
|
|
Carbon steel |
35 -
55 |
|
Nickel steel |
12 -
50 |
|
Chrome steel |
30 -
60 |
|
Cr -
Ni steel |
16 |
|
Ni -
Cr steel |
14 |
|
Silicon steel |
31 |
|
Manganese steel |
38 |
|
Tungsten steel |
62 |
| |
|
| Thermal Conductivity at given
Temperature |
|
|
Material |
Temperature |
Conductivity |
|
|
Fire
clay |
500o C |
1.28 |
|
Fire
clay |
1100o C |
1.4 |
|
Asbestos |
0o C |
0.151 |
|
Asbestos |
100o C |
0.192 |
|
Wool
felt |
30o C |
0.0519 |
|
Magnesite |
204o C |
3.81 |
|
Magnesite |
1204o C |
1.9 |
|
Ice |
0o C |
2.22 |
|
Diatomaceous earth |
204o C |
0.242 |
|
Diatomaceous earth |
872o C |
0.312 |
|
|
