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Thermal Conductivity of Stainless Steel 304, 316 at Various Temperatures

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Definition of Thermal Conductivity

Thermal conductivity also called heat conductivity, refers to the the heat transferred “K”, due to the unit temperature gradient, under steady conditions, in a unit time, in the direction perpendicular to the surface per unit area, and when the heat transfer depends only on the temperature gradient.

  • SI unit: W/m·K or W/m·°C
  • Imperial unit: Btu/ft·h·°F

Thermal Conductivity of Stainless Steel

This article summarizes the thermal conductivity of stainless steel 304 and 316 at various temperatures in annealed condition, also other stainless steel grades.

Thermal Conductivity of Stainless Steel at Various Temperatures
Stainless steelTemperature, 100 °C (212 °F)Temperature, 500 °C (932 °F)
W/m·K (Btu/ft·h·°F)W/m·K (Btu/ft·h·°F)
30416.2 (9.4)21.5 (12.4)
31616.2 (9.4)21.5 (12.4)
20116.2 (9.4)21.5 (12.4)
20216.2 (9.4)21.6 (12.5)
30116.2 (9.4)21.5 (12.4)
30216.2 (9.4)21.5 (12.4)
302B15.9 (9.2)21.6 (12.5)
30316.2 (9.4)21.5 (12.4)
302Cu11.2 (6.5)21.5 (12.4)
30516.2 (9.4)21.5 (12.4)
30815.2 (8.8)21.6 (12.5)
30915.6 (9.0)18.7 (10.8)
31014.2 (8.2)18.7 (10.8)
31417.5 (10.1)20.9 (12.1)
31716.2 (9.4)21.5 (12.4)
317L14.4 (8.3)
32116.1 (9.3)22.2 (12.8)
34716.1 (9.3)22.2 (12.8)
38416.2 (9.4)21.5 (12.4)
40527.0 (15.6)
41024.9 (14.4)28.7 (16.6)
41424.9 (14.4)28.7 (16.6)
41624.9 (14.4)28.7 (16.6)
42024.9 (14.4)
42223.9 (13.8)27.3 (15.8)
42925.6 (14.8)
430, 430F26.1 (15.1)26.3 (15.2)
43120.2 (11.7)
43426.3 (15.2)
43623.9 (13.8)26.0 (15.0)
43924.2 (14.0)
440A, 440C24.2 (14.0)
44426.8 (15.5)
44620.9 (12.1)24.4 (14.1)
PH 13-8 Mo14.0 (8.1)22.0 (12.7)
15-5 PH17.8 (10.3)23.0 (13.1)
17-4 PH18.3 (10.6)23.0 (13.1)
17-7 PH16.4 (9.5)21.8 (12.6)

Related post: Melting Point of Stainless Steel, Density of Stainless Steel, Density of Aluminum

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