Thermal Conductivity

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