Thermal diffusivity of selected materials and substances[8]

MaterialThermal diffusivity(m/s)Thermal diffusivity(mm/s)

Pyrolytic graphite, parallel to layers1.22 1031220

Silver, pure (99.9%)1.6563 104165.63

Gold1.27 104[9]127

Copperat 25C1.11 104[10]111

Aluminium8.418 10584.18

Al-10Si-Mn-Mg (Silafont 36) at 20C74.2 106[11]74.2

Aluminum 6061-T6 Alloy6.4 105[9]64

Al-5Mg-2Si-Mn (Magsimal-59) at 20C44.0 106[12]44.0

Steel, 1% carbon1.172 10511.72

Steel, stainless 304A at 27C4.2 106[9]4.2

Steel, stainless 310 at 25C3.352 106[13]3.352

Inconel 600at 25C3.428 106[14]3.428

Molybdenum(99.95%) at 25C54.3 106[15]54.3

Iron2.3 105[9]23

Silicon8.8 105[9]88

Quartz1.4 106[9]1.4

Carbon/carbon composite at 25C216.5 106[10]216.5

Aluminium oxide (polycrystalline)1.20 10512.0

Silicon Dioxide (Polycrystalline)8.3 107[9]0.83

Si3N4withCNTs26C9.142 106[16]9.142

Si3N4withoutCNTs26C8.605 106[16]8.605

PC(Polycarbonate) at 25C0.144 106[17]0.144

PP(Polypropylene) at 25C0.096 106[17]0.096

Paraffin at 25C0.081 106[17]0.081

PVC(Polyvinyl Chloride)8 108[9]0.08

PTFE(Polytetrafluorethylene) at 25C0.124 106[18]0.124

Water at 25C0.143 106[17]0.143

Alcohol7 108[9]0.07

Water vapour (1 atm, 400 K)2.338 10523.38

Air (300 K)1.9 105[9]19

Argon (300 K, 1 atm)2.2105[19]22

Helium (300 K, 1 atm)1.9104[19]190

Hydrogen (300 K, 1 atm)1.6104[19]160

Nitrogen (300 K, 1 atm)2.2105[19]22

Pyrolytic graphite, normal to layers3.6 1063.6

Sandstone1.121.19 1061.15

Tin4.0 105[9]40

Brick, common5.2 1070.52

Brick, adobe2.7 1070.27

Glass, window3.4 1070.34

Rubber1.3 107[citation needed]0.13

Nylon9 1080.09

Wood (Yellow Pine)8.2 1080.082

Oil, engine (saturated liquid, 100 C)7.38 1080.0738