| A | Surface area of specimen (m2) |
| M | Specimen mass (kg) |
| Heat flow rate (W) | |
| q | Heat flux (W/m2) |
| T | Temperature (°C, K) |
| δ | Thickness of specimen (m) |
| λ | Thermal conductivity (W/m K) |
| ρ | Density (kg/m3) |
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