Definition of Thermal Conductivity
Thermal conductivity, also called thermal conductivity, refers to the heat transferred “K”, due to the unit temperature gradient, under stationary conditions, in a unit of 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 304 and 316 stainless steel at various temperatures in the annealed condition, as well as other types of stainless steel.
| 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 months | 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) |
