List of thermal conductivities

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In heat transfer, the thermal conductivity of a substance, k, is an intensive property that indicates its ability to conduct heat.

Thermal conductivity is often measured with laser flash analysis. Alternative measurements are also established.

Mixtures may have variable thermal conductivities due to composition.

Note that this table shows thermal conductivity in units of watts per meter per Kelvin (W·m−1·K−1). This is the current metric unit of measurement. Prior to this, however, thermal conductivity was measured in terms of BTUs per foot per hour per degree Fahrenheit. A value for the former can be computed from the latter by multiplying by 1.728.1

Material Thermal conductivity W·m−1·K−1 Temperature [K] Electrical conductivity @ 293 K
Ω−1·m−1
Notes
Acrylic Glass (Plexiglas V045i) 0.172-0.192-0.23 2962 7.143E-152 - 5.0E-142
Air 0.024456-0.0257
0.0262 (1 bar)8
0.0457 (1 bar)8
27345-2937-2986
3008
6008
hiAerosols2.959-loAerosols7.839×10−15 (N,21%O+0.93%Ar+0.04%CO2) (1 atm)
Alcohols OR Oils 0.167-0.11010-0.2167-0.21210 2937-2986-30010
Aluminium, pure 204.311-2054-22012-2377131415-2506
214.611
249.311
293711-29861415
36611
47811
37,450,00014 - 37,740,00016
Aluminium nitride 17013-17517-19017 29317 1×10^−1117
Aluminium oxide, pure 2618-307-3518-3913-4019 29371819 1×10^−12-1819
Ammonia, saturated 0.50710 30010
Argon 0.0166-0.0177215-0.01791520 298615-3001520
Beryllium oxide 21813-26021-30021 29321 1×10^−1221
Bismuth 7.9715 30015
Brass Cu63% 12522 29622 15,150,00022 - 16,130,00022 (Cu63%, Zn37%)
Brass Cu70% 109423 - 12123 2934-29623 12,820,00023 - 16,130,00023 (Cu70%, Zn30%)
Brick 0.154-0.64-0.696-1.316 2934-2986
Bronze 2612
4224-501124
29311-29624
5,882,00024 - 7,143,00024
Sn25%12
(Cu89%, Sn11%)24
Calcium silicate 0.06325 37325
Carbon dioxide 0.01466-0.0146526-0.016820(sat. liquid 0.08727) 2986-27326-30020(29327)
Carbon nanotubes, bulk 2.5 (multiwall)28 - 35 (single wall, disordered mats)29 - 200(single wall, aligned mats)30 30031 "bulk" refers to a group of nanotubes either arranged or disordered, for a single nanotube, see "carbon nanotube, single" . 32
Carbon nanotube, single 3180 (multiwall)3334-3500 (single wall)35
(SWcalc.6,6003336-37,0003336)
3203334-30035
(3003336-1003336)
(Lateral)10−1637 - (Ballistic)10837) values only for one single SWNT(length:2.6 μm, diameter:1.7 nm) and CNT. "Single", as opposed to "bulk" quantity (see "carbon nanotubes, bulk" ) of many nanotubes, which should not be confused with the denomination of nanotubes themselves which can be singlewall(SWNT) or multiwall(CNT) 38
Concrete 0.84 - 1.287 2937 ~61-67%CaO
Copper, pure 3854-3861112-3907-40161539
368.711
353.111
293467111539
57311
87311
59,170,00039 - 59,590,00016 International Annealed Copper Standard (IACS) pure =1.7×10−8Ω•m
=58.82×106Ω−1•m−1

For main article, see: Copper in heat exchangers.

Cork 0.044 - 0.077 2937
Cotton or Plastic Insulation-foamed 0.0367 2937
Diamond, impure 1,000440 27340 - 2934 1×10^−16~41 Type I (98.1% of Gem Diamonds) (C+0.1%N)
Diamond, natural 2,20042 29342 1×10^−16~41 Type-IIA (99%12C and 1%13C)
Diamond, isotopically enriched 3,32042-41,0003343(99.999% 12C calc.200,00043) 29342-1043343(~8043) (Lateral)10−1641 - (Ballistic)10841 Type-IIA isotopically enriched (>99.9%12C)
Epoxy, thermally conductive 0.68244 - 1.038 - 1.38445
Expanded polystyrene - EPS 0.036-0.0334640((PS Only)0.146-0.1346) 9840-298640(29646) 1×10^−1446 (PS+Air+CO2+CnH2n+x)
Extruded polystyrene - XPS 0.029 - 0.39 98-298
Fiberglass or Foam-glass 0.0457 2937
Gallium arsenide 5640 30040
Glass 0.84-0.937(SiO2pure113-SiO296%1.247-1.447) 2934747 10−144849-10−1247-10−104849 <1% Iron oxides
Glycerol 0.28510-0.297 30010-2937
Gold, pure 3144-31511-318121550 29311-2981550 45,170,00016 - 45,450,00050
Granite 1.7351 - 3.9851 (72%SiO2+14%Al2O3+4%K2O etc.)
Graphene (4840±440)52 - (5300±480)52 29352 100,000,00053
Graphite (Synthetic) 25-47054 29354 5000000-3000000054
Helium II >100000 55 2.2 liquid Helium in its superfluid state below 2.2 K
Ice 1.64-2.17-2.240-2.2256 29347 - 2734056
Indium phosphide 8040 30040
Iron, pure 71.812-72.711-79.54-806-80.240-80.41557
55.411
34.611
293411-2986-300154057
57311
127311
9,901,00057 - 10,410,00016
Iron, cast 55612 2986 (Fe+(2-4)%C+(1-3)%Si)
Lead, pure 34.7411-35.0612-35.31558
29.811
293411-2986-3001558
57311
4,808,00016 - 4,854,00058
Limestone 1.2651 - 1.3351 Mostly CaCO3
Marble 2.0751-2.086-2.94651 2986 Mostly CaCO3
Methane 0.0306-0.0328159 2986-27359
Mineral Insulation or Wool(Felt/Glass/Rock) 0.04467 2937-2986
Nickel 90.915-916 298615
Nitrogen, pure 0.02344-0.0246-0.0258315-0.0262040 2934-2986-300152040 (N2) (1 atm)
Oxygen, pure (gas) 0.02384-0.0246-0.026320-0.0265815 2934-2986-3001520 (O2) (1 atm)
Paper 0.056 2986
Perlite, (1 atm) 0.0316 2986
Perlite, [partial] Vacuum 0.001376 2986
Plastic, fiber-reinforced 0.2360 - 0.760 - 1.067 2937 - 29660 10−1560 - 10060 10-40%GF or CF
Polyethylene High Density 0.426 - 0.516 2986
Polymer, High-Density 0.3360 - 0.5260 29660 10−1660 - 10260
Polymer, Low-density 0.0460 - 0.167 - 0.257 - 0.3360 2937 - 29660 10−1760 - 10060
Polyurethane foam 0.026 - 0.0216 2986
Quartz (single crystal) 1240 \parallel to c axis, 6.840 \perp to c axis 30040
Quartz-Fused or Vitreous Silica or Fused Silica 1.4661-37
1.440
293761
32340
1.333E-1848 - 10−1661
Rice hulls (ash) 0.06262
Rice hulls (whole) 0.035962
Rubber (92%) 0.1640 30340 1×10^−13~48
Sandstone 1.8351 - 2.9051
2.163 - 3.963
~95-71%SiO2
~98-48%SiO2, ~16-30% Porosity
Silica Aerogel 0.00340(carbon black9%~0.004264)-0.00864-0.01764-0.026-0.0340 9840 - 298640 Foamed Glass
Silver, pure 4064-40711-41812
42713-4296154065-43015
293411
29861565-3001540
61,350,00065 - 63,010,00016 Highest electrical conductivity of any metal
Silver, sterling 36166
Snow, dry 0.056-0.114-0.256 2736
Sodium chloride 35.1 - 6.5 - 4.85 67 80 - 289 - 400 67
Soil, dry w/ organic matter 0.15768-1.1568-27 2937 composition may vary
Soil, saturated 0.67-47 2937 composition may vary
Solder, Sn/63% Pb/37% 5069
Lead free solder, Sn/95.6% Ag/3.5% Cu/0.9%, Sn/95.5% Ag/3.8% Cu/0.7% (SAC) ~6069
Steel, carbon 361112-43650.24-5461112 293411-2986 (Fe+(1.5-0.5)%C)
Steel, stainless 16.31270-16.771-1872-2472 296707172 1,176,00071 - 1,786,00072 (Fe, Cr12.5-25%, Ni0-20%, Mo0-3%, Ti0-trace)
Thermal grease, silver-based 8.89+73
Thermal tape 0.6074
Titanium, pure 15.612-19.011-21.91575-22.511 29311-3001575 1,852,00075 - 2,381,00016
Titanium Alloy 5.876 29676 595,20076 (Ti+6%Al+4%V)
Tungsten, Pure 17341 29341 18,940,00041
Water 0.56377-0.59677-0.647-0.60910 27377-2934777-30010 Pure10−641-Sweet10−3±141-Sea177 <477%(NaCl+MgCl2+CaCl2)
Water vapor 0.0166-0.02479 (101.3 kPa)78
0.0471 (1 bar)8
29378-3986
6008
Wood, +>=12% water 0.0909179-0.1640-0.2179-0.47 29840-2937 Species-Variable79
Wood, oven-dry 0.044-0.0556-0.0769279-0.124-0.17679 2934-2986 Balsa6-Cedar79-Hickory79/Oak6
Zinc, Pure 11641 29341 16,950,00041
Zinc oxide 2113
Material Thermal conductivity W·m−1·K−1 Temperature [K] Electrical conductivity @ 293 K Ω−1·m−1 Notes

See also

References

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External links