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 steel Temperature, 100 °C (212 °F) Temperature, 500 °C (932 °F)
W/m·K (Btu/ft·h·°F) W/m·K (Btu/ft·h·°F)
304 16.2 (9.4) 21.5 (12.4)
316 16.2 (9.4) 21.5 (12.4)
201 16.2 (9.4) 21.5 (12.4)
202 16.2 (9.4) 21.6 (12.5)
301 16.2 (9.4) 21.5 (12.4)
302 16.2 (9.4) 21.5 (12.4)
302B 15.9 (9.2) 21.6 (12.5)
303 16.2 (9.4) 21.5 (12.4)
302Cu 11.2 (6.5) 21.5 (12.4)
305 16.2 (9.4) 21.5 (12.4)
308 15.2 (8.8) 21.6 (12.5)
309 15.6 (9.0) 18.7 (10.8)
310 14.2 (8.2) 18.7 (10.8)
314 17.5 (10.1) 20.9 (12.1)
317 16.2 (9.4) 21.5 (12.4)
317L 14.4 (8.3)
321 16.1 (9.3) 22.2 (12.8)
347 16.1 (9.3) 22.2 (12.8)
384 16.2 (9.4) 21.5 (12.4)
405 27.0 (15.6)
410 24.9 (14.4) 28.7 (16.6)
414 24.9 (14.4) 28.7 (16.6)
416 24.9 (14.4) 28.7 (16.6)
420 24.9 (14.4)
422 23.9 (13.8) 27.3 (15.8)
429 25.6 (14.8)
430, 430F 26.1 (15.1) 26.3 (15.2)
431 20.2 (11.7)
434 26.3 (15.2)
436 23.9 (13.8) 26.0 (15.0)
439 24.2 (14.0)
440A, 440C 24.2 (14.0)
444 26.8 (15.5)
446 20.9 (12.1) 24.4 (14.1)
PH 13-8 Mo 14.0 (8.1) 22.0 (12.7)
15-5 PH 17.8 (10.3) 23.0 (13.1)
17-4 PH 18.3 (10.6) 23.0 (13.1)
17-7 PH 16.4 (9.5) 21.8 (12.6)

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

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