Thermal conductivity of solids
Material

l [W m-1 K-1]

tmax [°C]

building bricks 0,60

-

refractory bricks 1,20

1600

fibrous plates or mats made of:
asbestos
NETAS SK/600 KP

0,06

1000
ceramic, refractory
TERMOVIT

0,12

1260
mineral
ORSIL EL a ORSIL L
ORSIL M, N a T

0,044
0,05

200
700
glass
ITAVEL 12
ITAVEL 24

0,035
0,041

250
250
blast furnace slag
V-150 up to V-350

0,05

700
corck, granulated 0,04 120
cork sheets, pressed 0,05 120
lime scale 1,7 -
microporous inorganic insulating materials
(e.g. SANTOCEL)
0,03 1000
Expanded perlite (loose) 0,1 750
woolen felt 0,06 90
polyurethane, foam 0,03 100
polystyrene, foam 0,04 80
glass foam 0,06 430
fiberglass 0,04 600
slag wool 0,07 750
vermiculite 250 loose 0,2 1000

tmax is the maximum temperature which the material will sustain
l is given for temperature (20 + tmax)/2 °C

Thermal conductivity of selected metals and alloys as a function of temperature

Temperature, [°C]

0 100 200 300 400 500 600
Metal l [W m-1 K-1]
tin 62 59 57 - - - -
aluminiumk 203 206 215 230 249 268 -
copper, pure 388 377 372 367 363 358 353
brass (30 hm.% Zn, 70 hm.% Cu) 97 104 109 114 116 - -
nickel 62 59 57 55 - - -
carbon steel - 47 47 45 42 40 38
lead 34 33 31 31 - - -
silver 418 412 - - - - -
zinc 112 110 107 102 93 - -