Superheated Steam Table
Properties of superheated steam at various pressures and temperatures. Essential for turbine applications, steam flow calculations, and process heating above saturation temperature.
How to Use This Table
Superheated steam has been heated above its saturation temperature at the given pressure. It has no moisture and its temperature can be independently controlled. To use this table, you need both pressure AND temperature — two variables define the state of superheated steam.
The table shows specific volume (v), enthalpy (h), and entropy (s) at various pressure-temperature combinations.
Superheated Steam at 10 bar absolute
| Temperature (°C) | v (m³/kg) | h (kJ/kg) | s (kJ/kg·K) |
|---|---|---|---|
| 180 (sat) | 0.194 | 2778 | 6.587 |
| 200 | 0.206 | 2829 | 6.695 |
| 250 | 0.233 | 2944 | 6.927 |
| 300 | 0.258 | 3052 | 7.124 |
| 350 | 0.282 | 3158 | 7.302 |
| 400 | 0.306 | 3264 | 7.465 |
| 450 | 0.330 | 3371 | 7.616 |
| 500 | 0.354 | 3479 | 7.759 |
Superheated Steam at 20 bar absolute
| Temperature (°C) | v (m³/kg) | h (kJ/kg) | s (kJ/kg·K) |
|---|---|---|---|
| 212 (sat) | 0.100 | 2799 | 6.338 |
| 250 | 0.111 | 2902 | 6.547 |
| 300 | 0.125 | 3025 | 6.769 |
| 350 | 0.139 | 3139 | 6.955 |
| 400 | 0.152 | 3248 | 7.124 |
| 450 | 0.165 | 3357 | 7.277 |
| 500 | 0.178 | 3466 | 7.422 |
Superheated Steam at 40 bar absolute
| Temperature (°C) | v (m³/kg) | h (kJ/kg) | s (kJ/kg·K) |
|---|---|---|---|
| 250 (sat) | 0.050 | 2801 | 6.071 |
| 300 | 0.059 | 2962 | 6.365 |
| 350 | 0.066 | 3095 | 6.584 |
| 400 | 0.073 | 3214 | 6.771 |
| 450 | 0.080 | 3328 | 6.937 |
| 500 | 0.087 | 3440 | 7.091 |
Why superheated steam?
Superheated steam is used for turbines because it has no moisture — moisture in steam erodes turbine blades at high velocity. For process heating, saturated steam is preferred because it transfers heat at constant temperature during condensation.
How CHI can help
Ask CHI about superheated steam properties and to determine whether your application requires superheated or saturated steam. The CHI assistant can look up specific values, explain what each table entry means, and help you cross-reference between different standards and unit systems.