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# Ammonia - Thermal Conductivity vs. Temperature and Pressure

## Online calculator, figures and tables showing thermal conductivity of liquid and gaseous ammonia at temperatures ranging -70 to 425 °C (-100 to 800 °F) at atmospheric and higher pressure - Imperial and SI Units.

Thermal conductivity is a material property that describes ability to conduct heat . Thermal conductivity can be defined as

"the quantity of heat transmitted through a unit thickness of a material - in a direction normal to a surface of unit area - due to a unit temperature gradient under steady state conditions".

Thermal conductivity most common units are W/(m K) in the SI system and Btu/(h ft °F) in the Imperial system.

Tabulated values and thermal conductivity units conversion are given below the figures.

### Online Ammonia Thermal Conductivity Calculator

The calculator below can be used to calculate the thermal conductivity of ammonia at given temperatures and pressure.
The output conductivity is given as mW/(m K), Btu(IT)/(h ft °F) and kcal(IT)/(h m K).

Choose the actual unit of temperature:
Choose the actual pressure:

See also other properties of Ammonia at varying temperature and pressure: Density and specific weight , Dynamic and kinematic viscosity , Prandtl Number , Properties at Gas-Liquid Equilibrium pressure , Specific Heat (Heat Capacity) and Thermal Conductivity , and Thermophysical properties at standard conditions and Vapour pressure at gas-liquid equilibrium ,
as well as thermal conductivity o f air , butane , carbon dioxide , ethane , ethylene , hydrogen , methane , nitrogen , propane and water .

Ammonia thermal conductivity at given temperatures and pressures:

For full table with Thermal Conductivity - rotate the screen!

Ammonia - Thermal Conductivity vs. Temperature and Pressure
State Temperature Pressure Thermal conductivity
[K] [°C] [°F] [MPa] [bara] [psia] [mW/m K] [kcal(IT)/(h m K)] [Btu(IT)/(h ft °F)]
Liquid 200 -73.2 -99.7 0.1 1 15 803.2 0.6907 0.4641
239.56 -33.6 -28.5 0.1 1 15 666.6 0.5731 0.3851
Gas 239.56 -33.6 -28.5 0.1 1 15 20.96 0.01802 0.01211
300 26.9 80.3 0.1 1 15 25.10 0.02158 0.01450
400 126.9 260.3 0.1 1 15 37.22 0.03200 0.02150
500 226.9 440.3 0.1 1 15 53.12 0.04567 0.03069
600 326.9 620.3 0.1 1 15 68.61 0.05899 0.03964
700 426.9 800.3 0.1 1 15 78.31 0.06734 0.04525
Liquid 200 -73.2 -99.7 1 10 145 804.2 0.6915 0.4647
298.05 24.9 76.8 1 10 145 485.8 0.4177 0.2807
Gas 298.05 24.9 76.8 1 10 145 26.15 0.02248 0.01511
300 26.9 80.3 1 10 145 26.31 0.02262 0.01520
400 126.9 260.3 1 10 145 38.09 0.03275 0.02201
500 226.9 440.3 1 10 145 53.75 0.04622 0.03106
600 326.9 620.3 1 10 145 69.12 0.05944 0.03994
700 426.9 800.3 1 10 145 78.75 0.06771 0.04550
Liquid 200 -73.2 -99.7 5 50 725 808.6 0.6953 0.4672
300 26.9 80.3 5 50 725 487.6 0.4192 0.2817
362.03 88.9 192.0 5 50 725 313.9 0.2699 0.1814
Gas 362.03 88.9 192.0 5 50 725 41.69 0.03585 0.02409
400 126.9 260.3 5 50 725 45.73 0.03932 0.02642
500 226.9 440.3 5 50 725 57.29 0.04926 0.03310
600 326.9 620.3 5 50 725 71.79 0.06173 0.04148
700 426.9 800.3 5 50 725 80.94 0.06960 0.04677
Liquid 200 -73.2 -99.7 10 100 1450 814.0 0.6999 0.4703
300 26.9 80.3 10 100 1450 496.5 0.4269 0.2869
398.32 125.2 257.3 10 100 1450 218.7 0.1881 0.1264
Gas 398.32 125.2 257.3 10 100 1450 101.0 0.08688 0.05838
400 126.9 260.3 10 100 1450 95.5 0.08208 0.05515
500 226.9 440.3 10 100 1450 63.9 0.05496 0.03693
600 326.9 620.3 10 100 1450 76.1 0.06539 0.04394
700 426.9 800.3 10 100 1450 84.2 0.07243 0.04867
Liquid 300 26.9 80.3 100 1000 14504 622.9 0.5356 0.3599
400 126.9 260.3 100 1000 14504 432.0 0.3714 0.2496
500 226.9 440.3 100 1000 14504 305.7 0.2628 0.1766
600 326.9 620.3 100 1000 14504 234.8 0.2019 0.1357
700 426.9 800.3 100 1000 14504 196.0 0.1686 0.1133
300 26.9 80.3 500 5000 72519 989.0 0.8504 0.5714
400 126.9 260.3 500 5000 72519 804.1 0.6914 0.4646
500 226.9 440.3 500 5000 72519 674.0 0.5795 0.3894
600 326.9 620.3 500 5000 72519 582.6 0.5010 0.3366
700 426.9 800.3 500 5000 72519 511.6 0.4399 0.2956
300 26.9 80.3 1000 10000 145038 1324 1.1384 0.7650
400 126.9 260.3 1000 10000 145038 1139 0.9793 0.6580
500 226.9 440.3 1000 10000 145038 996.5 0.8568 0.5758
600 326.9 620.3 1000 10000 145038 887.7 0.7633 0.5129
700 426.9 800.3 1000 10000 145038 797.3 0.6855 0.4606

Thermal conductivity units conversion:

Thermal conductivity unit converter

british thermal unit(international)/(foot hour degree fahrenheit) [Btu(IT)/(ft h°F], british thermal unit(international)/(inch hour degree fahrenheit) [Btu(IT)/(in h°F], british thermal unit(international)*inch/(square foot*hour*degree fahrenheit) [(Btu(IT) in)/(ft² h°F)], kilocalorie/(meter hour degree celcius) [kcal/(m h°C)], joule/(centimeter second degree kelvin) [J/(cm s K)], watt/(meter degree kelvin) [W/(m°C)],

• 1 Btu(IT)/(ft h°F) = 1/12 Btu(IT)/(in h°F) = 0.08333 Btu(IT)/(in h°F) = 12 Btu(IT)in/(ft2h°F) = 1.488 kcal/(m h°C) = 0.01731 J/(cm s K) = 1.731 W/(m K)
• 1 Btu(IT)/(in h°F) = 12 Btu(IT)/(ft h°F) = 144 Btu(IT)in/(ft2h°F) = 17.858 kcal/(m h°C) = 0.20769 J/(cm s K)= 20.769 W/(m K)
• 1 (Btu(IT) in)/(ft² h°F) = 0.08333 Btu(IT)/(ft h°F) = 0.00694 Btu(IT)/(in h°F) = 0.12401 kcal/(m h°C) = 0.001442 J/(cm s K) = 0.1442 W/(m K)
• 1 J/(cm s K) = 100 W/(m K) = 57.789 Btu(IT)/(ft h°F) = 4.8149 Btu(IT)/(in h°F) = 693.35 (Btu(IT) in)/(ft² h°F) = 85.984 kcal/(m h°C)
• 1 kcal/(m h°C) = 0.6720 Btu(IT)/(ft h°F) = 0.05600 Btu(IT)/(in h°F) = 8.0636 (Btu(IT) in)/(ft2h°F) = 0.01163 J/(cm s K) = 1.163 W/(m K)
• 1 W/(m K) = 0.01 J/(cm s K) = 0.5779 Btu(IT)/(ft h°F) = 0.04815 Btu(IT)/(in h°F) = 6.9335 (Btu(IT) in)/(ft² h°F) = 0.85984 kcal/(m h°C)

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## Citation

• The Engineering ToolBox (2018). Ammonia - Thermal Conductivity vs. Temperature and Pressure. [online] Available at: https://www.engineeringtoolbox.com/ammonia-thermal-conductivity-gas-liquid-temperature-pressure-d_2014.html [Accessed Day Month Year].

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7.8.15

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