Thermal Conductivity of Gases Chart

This chart gives the thermal conductivity of gases as a function of temperature.

Unless otherwise noted, the values refer to a pressure of 100 kPa (1 bar) or to the saturation vapor pressure if that is less than 100 kPa.

The notation P = 0 indicates the low pressure limiting value is given. In general, the P = 0 and P = 100 kPa values differ by less than 1%.

Units: mW/m K ( milliwatts per meter kelvin).

MF
Name
100 K
200 K
300 K
400 K
500 K
600 K
-
Air
9.4
18.4
26.2
33.3
39.7
45.7
Ar
Argon
6.2
12.4
17.9
22.6
26.8
30.6
BF3
Boron trifluoride
-
-
19.0
24.6
-
-
H2
Hydrogen (P = 0)
68.6
131.7
186.9
230.4
-
-
F6S
Sulfur hexafluoride (P = 0)
-
-
13.0
20.6
27.5
33.8
H2O
Water
-
-
18.7
27.1
35.7
47.1
H2S
Hydrogen sulfide
-
-
14.6
20.5
26.4
32.4
NH3
Ammonia
-
-
24.4
37.4
51.6
66.8
He
Helium (P = 0)
75.5
119.3
156.7
190.6
222.3
252.4 8
Kr
Krypton (P = 0)
3.3
6.4
9.5
12.3
14.8
17.1
NO
Nitric oxide
-
17.8
25.9
33.1
39.6
46.2
N2
Nitrogen
9.8
18.7
26.0
32.3
38.3
44.0
N2O
Nitrous oxide
-
9.8
17.4
26.0
34.1
41.8
Ne
Neon (P = 0)
22.3
37.6
49.8
60.3
69.9
78.7
O2
Oxygen
9.3
18.4
26.3
33.7
41.0
48.1
O2S
Sulfur dioxide
-
-
9.6
14.3
20.0
25.6
Xe
Xenon (P = 0)
2.0
3.6
5.5
7.3
8.9
10.4
CCl2F2
Dichlorodifluoromethane
-
-
9.9
15.0
20.1
25.2
CF4
Tetrafluoromethane (P = 0)
-
-
16.0
24.1
32.2
39.9
CO
Carbon monoxide (P = 0)
-
-
25.0
32.3
39.2
45.7
CO2
Carbon dioxide
-
9.6
16.8
25.1
33.5
41.6
CHCl3
Trichloromethane
-
-
7.5
11.1
15.1
-
CH4
Methane
-
22.5
34.1
49.1
66.5
84.1
CH4O
Methanol
-
-
-
26.2
38.6
53.0
C2H2
Acetylene
-
-
21.4
33.3
45.4
56.8
C2H4
Ethylene
-
11.1
20.5
34.6
49.9
68.6
C2H6
Ethane
-
11.0
21.3
35.4
52.2
70.5
C2H6O
Ethanol
-
-
14.4
25.8
38.4
53.2
C3H6O
Acetone
-
-
11.5
20.2
30.6
42.7
C3H8
Propane
-
-
18.0
30.6
45.5
61.9
C4H10
Butane
-
-
16.4
28.4
43.0
59.1
C5H12
Pentane
-
-
14.4
24.9
37.8
52.7
C6H14
Hexane
-
-
-
23.4
35.4
48.7

Gases - Thermal Properties of Gases
Properties of Gases at Atmospheric Pressure

Gas
Temperature
°C
Conductivity
W/m-°C
Density
kg/m3
Specific Heat
J/kg-°C
Dynamic Viscosity
kg/m-s
Kinematic Viscosity
m2 /s
Thermal Diffusivity
m2 /s
Helium
-129.0
0.0928
0.3379
5.2 x 103
12.55 x 10-6
37.11 x 10-6
52.75 x 10-6
Helium
-73.0
0.1177
0.2435
5.2 x 103
15.66 x 10-6
64.38 x 10-6
92.88 x 10-6
Helium
-18.0
0.1357
0.1906
5.2 x 103
18.17 x 10-6
95.5 x 10-6
136.75 x 10-6
Helium
93.0
0.1691
0.1328
5.2 x 103
23.05 x 10-6
173.6 x 10-6
244.9 x 10-6
Helium
204.0
0.197
0.10204
5.2 x 103
27.5 x 10-6
269.3 x 10-6
371.6 x 10-6
Helium
316.0
0.225
0.08282
5.2 x 103
31.13 x 10-6
375.8 x 10-6
521.5 x 10-6
Helium
427.0
0.251
0.07032
5.2 x 103
34.75 x 10-6
494.2 x 10-6
666.1 x 10-6
Helium
527.0
0.275
0.06023
5.2 x 103
38.17 x 10-6
634.1 x 10-6
877.4 x 10-6
Hydrogen
-123.0
0.0981
0.16371
12.602 x 103
5.595 x 10-6
34.18 x 10-6
47.5 x 10-6
Hydrogen
-73.0
0.1282
0.1227
13.54 x 103
6.813 x 10-6
55.53 x 10-6
77.2 x 10-6
Hydrogen
-23.0
0.1561
0.09819
14.059 x 103
7.919 x 10-6
80.64 x 10-6
113.0 x 10-6
Hydrogen
27.0
0.182
0.08185
14.314 x 103
8.963 x 10-6
109.5 x 10-6
155.4 x 10-6
Hydrogen
77.0
0.206
0.07016
14.436 x 103
9.954 x 10-6
141.9 x 10-6
203.1 x 10-6
Hydrogen
127.0
0.228
0.06135
14.491 x 103
10.864 x 10-6
177.1 x 10-6
256.8 x 10-6
Hydrogen
177.0
0.251
0.05462
14.499 x 103
11.779 x 10-6
215.6 x 10-6
316.4 x 10-6
Hydrogen
227.0
0.272
0.04918
14.507 x 103
12.636 x 10-6
257.0 x 10-6
381.7 x 10-6
Hydrogen
277.0
0.292
0.04469
14.532 x 103
13.475 x 10-6
301.6 x 10-6
451.6 x 10-6
Hydrogen
327.0
0.315
0.04085
14.537 x 103
14.285 x 10-6
349.7 x 10-6
530.6 x 10-6
Hydrogen
427.0
0.351
0.03492
14.574 x 103
15.89 x 10-6
455.1 x 10-6
690.3 x 10-6
Hydrogen
527.0
0.384
0.0306
14.675 x 103
17.4 x 10-6
569.0 x 10-6
856.3 x 10-6
Hydrogen
527.0
0.412
0.02723
14.821 x 103
18.78 x 10-6
690.0 x 10-6
0.0010217
Oxygen
-123.0
0.01367
2.619
917.8
11.49 x 10-6
4.387 x 10-6
5.688 x 10-6
Oxygen
-73.0
0.01824
1.9559
913.1
14.85 x 10-6
7.593 x 10-6
10.214 x 10-6
Oxygen
-23.0
0.02259
1.5618
915.7
17.87 x 10-6
11.45 x 10-6
15.794 x 10-6
Oxygen
27.0
0.02676
1.3007
920.3
20.63 x 10-6
15.86 x 10-6
22.353 x 10-6
Oxygen
77.0
0.0307
1.1133
929.1
23.16 x 10-6
20.8 x 10-6
29.68 x 10-6
Oxygen
127.0
0.03461
0.9755
942.0
25.54 x 10-6
26.18 x 10-6
37.68 x 10-6
Oxygen
177.0
0.03828
0.8682
956.7
27.77 x 10-6
31.99 x 10-6
46.09 x 10-6
Oxygen
227.0
0.04173
0.7801
972.2
29.91 x 10-6
38.34 x 10-6
55.02 x 10-6
Oxygen
277.0
0.04517
0.7096
988.1
31.97 x 10-6
45.05 x 10-6
64.1 x 10-6
Nitrogen
-73.0
0.01824
1.7108
1.0429 x 103
12.947 x 10-6
7.568 x 10-6
10.224 x 10-6
Nitrogen
27.0
0.0262
1.1421
1.0408 x 103
17.84 x 10-6
15.63 x 10-6
22.044 x 10-6
Nitrogen
127.0
0.03335
0.8538
1.0459 x 103
21.98 x 10-6
25.74 x 10-6
37.34 x 10-6
Nitrogen
227.0
0.03984
0.6824
1.0555 x 103
25.7 x 10-6
37.66 x 10-6
55.3 x 10-6
Nitrogen
327.0
0.0458
0.5624
1.0756 x 103
29.11 x 10-6
51.19 x 10-6
74.86 x 10-6
Nitrogen
427.0
0.05123
0.4934
1.0969 x 103
32.13 x 10-6
65.13 x 10-6
94.66 x 10-6
Nitrogen
527.0
0.05609
0.4277
1.1225 x 103
34.84 x 10-6
81.46 x 10-6
116.85 x 10-6
Nitrogen
627.0
0.0607
0.3796
1.1464 x 103
37.49 x 10-6
91.06 x 10-6
139.46 x 10-6
Nitrogen
727.0
0.06475
0.3412
1.1677 x 103
40.0 x 10-6
117.2 x 10-6
162.5 x 10-6
Nitrogen
827.0
0.0685
0.3108
1.1857 x 103
42.28 x 10-6
136.0 x 10-6
185.91 x 10-6
Nitrogen
927.0
0.07184
0.2851
1.2037 x 103
44.5 x 10-6
156.1 x 10-6
209.32 x 10-6
Carbon dioxide
-53.0
0.010805
2.4733
783.0
11.105 x 10-6
4.49 x 10-6
5.92 x 10-6
Carbon dioxide
-23.0
0.012884
2.1657
804.0
12.59 x 10-6
5.813 x 10-6
7.401 x 10-6
Carbon dioxide
27.0
0.016572
1.7973
871.0
14.958 x 10-6
8.321 x 10-6
10.588 x 10-6
Carbon dioxide
77.0
0.02047
1.5362
900.0
17.205 x 10-6
11.19 x 10-6
14.808 x 10-6
Carbon dioxide
127.0
0.02461
1.3424
942.0
19.32 x 10-6
14.39 x 10-6
19.463 x 10-6
Carbon dioxide
177.0
0.02897
1.1918
980.0
21.34 x 10-6
17.9 x 10-6
24.813 x 10-6
Carbon dioxide
227.0
0.03352
1.0732
1.013 x 103
23.26 x 10-6
21.67 x 10-6
30.84 x 10-6
Carbon dioxide
277.0
0.03821
0.9739
1.047 x 103
25.08 x 10-6
25.74 x 10-6
37.5 x 10-6
Carbon dioxide
327.0
0.04311
0.8938
1.076 x 103
26.83 x 10-6
30.02 x 10-6
44.83 x 10-6
Ammonia, NH 3
0.0
0.022
0.7929
2.177 x 103
9.353 x 10-6
11.8 x 10-6
13.08 x 10-6
Ammonia, NH 3
50.0
0.027
0.6487
2.177 x 103
11.035 x 10-6
17.0 x 10-6
19.2 x 10-6
Ammonia, NH 3
100.0
0.0327
0.559
2.236 x 103
12.886 x 10-6
23.0 x 10-6
26.19 x 10-6
Ammonia, NH 3
150.0
0.0391
0.4934
2.315 x 103
14.672 x 10-6
29.7 x 10-6
34.32 x 10-6
Ammonia, NH 3
200.0
0.0467
0.4405
2.395 x 103
16.49 x 10-6
37.4 x 10-6
44.21 x 10-6
Water vapor
107.0
0.0246
0.5863
2.06 x 103
12.71 x 10-6
21.6 x 10-6
20.36 x 10-6
Water vapor
127.0
0.0261
0.5542
2.014 x 103
13.44 x 10-6
24.2 x 10-6
23.38 x 10-6
Water vapor
177.0
0.0299
0.4942
1.98 x 103
15.25 x 10-6
31.1 x 10-6
30.7 x 10-6
Water vapor
227.0
0.0339
0.4405
1.985 x 103
17.04 x 10-6
38.6 x 10-6
38.7 x 10-6
Water vapor
277.0
0.0379
0.4005
1.997 x 103
18.84 x 10-6
47.0 x 10-6
47.5 x 10-6
Water vapor
327.0
0.0422
0.3652
2.026 x 103
20.67 x 10-6
56.6 x 10-6
57.3 x 10-6
Water vapor
377.0
0.0464
0.338
2.056 x 103
22.47 x 10-6
66.4 x 10-6
66.6 x 10-6
Water vapor
427.0
0.0505
0.314
2.085 x 103
24.26 x 10-6
77.2 x 10-6
77.2 x 10-6
Water vapor
477.0
0.0549
0.2931
2.119 x 103
26.04 x 10-6
88.8 x 10-6
88.3 x 10-6
Water vapor
527.0
0.0592
0.2739
2.152 x 103
27.86 x 10-6
102.0 x 10-6
100.1 x 10-6
Water vapor
577.0
0.0637
0.2579
2.186 x 103
29.69 x 10-6
115.2 x 10-6
113.0 x 10-6

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References:

  • Kadoya, K. Matsunaga, N., and Nagashima, A., Viscosity and thermal conductivity of dry air in the gaseous phase, J. Phys. Chem. Ref. Data, 14, 947, 1985.
  • Younglove, B. A. and Hanley, H. J. M., The viscosity and thermal conductivity coefficients of gaseous and liquid argon, J. Phys. Chem. Ref. Data, 15, 1323, 1986.
  • Holland, P. M., Eaton, B. E., and Hanley, H. J. M., A correlation of the viscosity and thermal conductivity data of gaseous and liquid ethylene, J. Phys. Chem. Ref. Data, 12, 917, 1983.

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