Thermal Conductivities of Various Materials

Thermal Conductivity - k - W/(m.K)

Material/Substance

Temperature - o C

25

125

225

Acetone

0.16

Acrylic

0.2

Air (gas)

0.024

Alcohol

0.17

Aluminium

250

255

250

Aluminum Oxide

30

Ammonia (gas)

0.022

Antimony

18.5

Argon (gas)

0.016

Asbestos-cement board

0.744

Asbestos-cement sheets

0.166

Asbestos-cement

2.07

Asbestos, loosely packed

0.15

Asbestos mill board

0.14



Asphalt

0.75

Balsa

0.048

Bitumen

0.17

Benzene

0.16

Beryllium

218

Brass

109

Brick dense

1.31

Brick work

0.69

Cadmium

92

Carbon

1.7

Carbon dioxide (gas)

0.0146



Cement, portland

0.29

Cement, mortar

1.73

Chalk

0.09



Chrome Nickel Steel (18% Cr, 8 % Ni)

16.3



Clay, dry to moist

0.15 - 1.8



Clay, saturated

0.6 - 2.5



Cobalt

69

Concrete, light

0.42

Concrete, stone

1.7



Constantan

22

Copper

401

400

398

Corian (ceramic filled)

1.06

Corkboard

0.043

Cork, regranulated

0.044

Cork

0.07

Cotton

0.03

Carbon Steel

54

51

47

Cotton Wool insulation

0.029

Diatomaceous earth (Sil-o-cel)

0.06

Earth, dry

1.5



Engine Oil

0.15

Ether

0.14

Epoxy

0.35

Ethylene glycol

0.25

Felt insulation

0.04

Fiberglass

0.04

Fiber insulating board

0.048

Fiber hardboard

0.2



Fireclay brick 500 o C

1.4

Foam glass

0.045

Freon 12 (gas)

0.073



Freon (liquid)

0.07

Gasoline

0.15

Glass

1.05

Glass, Pearls, dry

0.18

Glass, Pearls, saturated

0.76

Glass, window

0.96



Glass, wool Insulation

0.04

Glycerol

0.28

Gold

310

312

310

Granite

1.7 - 4.0

Gypsum or plaster board

0.17

Hairfelt

0.05



Hardboard high density

0.15

Hardwoods (oak, maple..)

0.16

Helium (gas)

0.142

Hydrogen (gas)

0.168

Ice (0 o C, 32 o F)

2.18

Insulation materials

0.035 - 0.16

Iridium

147

Iron

80

68

60

Iron, wrought

59

Iron, cast

55

Kapok insulation

0.034

Kerosene

0.15

Lead Pb

35

Leather, dry

0.14

Limestone

1.26 - 1.33

Magnesia insulation (85%)

0.07

Magnesite

4.15



Magnesium

156

Marble

2.08 - 2.94

Mercury

8

Methane (gas)

0.030

Methanol

0.21

Mica

0.71

Mineral insulation materials, wool blankets ..

0.04



Molybdenum

138

Monel

26

Nickel

91

Nitrogen

0.024

Nylon 6

0.25

Oil, machine lubricating SAE 50

0.15

Olive oil

0.17

Oxygen

0.024

Paper

0.05

Paraffin Wax

0.25

Perlite, atmospheric pressure

0.031



Perlite, vacuum

0.00137



Plaster, gypsum

0.48

Plaster, metal lath

0.47

Plaster, wood lath

0.28

Plastics, foamed (insulation materials)

0.03



Platinum

70

71

72

Plywood

0.13

Polyethylene HD

0.42 - 0.51

Polypropylene

0.1 - 0.22



Polystyrene expanded

0.03

Polyurethane foam

0.02

Porcelain

1.5

PTFE

0.25

PVC

0.19

Pyrex glass

1.005

Quartz mineral

3

Rock, solid

2 - 7



Rock, porous volcanic (Tuff)

0.5 - 2.5



Rock Wool insulation

0.045

Sand, dry

0.15 - 0.25

Sand, moist

0.25 - 2



Sand, saturated

2 - 4

Sandstone

1.7



Sawdust

0.08

Silica aerogel

0.02



Silicone oil

0.1

Silver

429

Snow (temp < 0 o C)

0.05 - 0.25

Sodium

84

Softwoods (fir, pine ..)

0.12

Soil, with organic matter

0.15 - 2



Soil, saturated

0.6 - 4



Steel, Carbon 1%

43

Stainless Steel

16

17

19

Straw insulation

0.09

Styrofoam

0.033

Tin Sn

67

Zinc Zn

116

Urethane foam

0.021



Vermiculite

0.058



Vinyl ester

0.25

Water

0.58

Water, vapor (steam)

0.016

Wood across the grain, white pine

0.12

Wood across the grain, balsa

0.055

Wood across the grain, yellow pine

0.147

Wood, oak

0.17



Wool, felt

0.07

Add comment

Security code
Refresh