Superheated Steam Table — 0.5 bar (0.05 MPa)
Specific volume, internal energy, enthalpy, entropy, density and isobaric specific heat of superheated steam at 0.5 bar (0.05 MPa), computed from IAPWS-IF97 — the same formulation the SimuPipe solver uses. Rows run from the saturation temperature (81.32 °C) to 800 °C in 20 °C steps.
| T (°C) | v (m³/kg) | ρ (kg/m³) | u (kJ/kg) | h (kJ/kg) | s (kJ/kg·K) | cp (kJ/kg·K) |
|---|---|---|---|---|---|---|
| 81.32Sat. | 3.2401 | 0.3086 | 2483.2 | 2645.2 | 7.5930 | 2.0155 |
| 100 | 3.4188 | 0.2925 | 2511.5 | 2682.4 | 7.6952 | 1.9732 |
| 120 | 3.6081 | 0.2772 | 2541.3 | 2721.7 | 7.7977 | 1.9562 |
| 140 | 3.7962 | 0.2634 | 2570.9 | 2760.7 | 7.8946 | 1.9494 |
| 160 | 3.9834 | 0.2510 | 2600.5 | 2799.7 | 7.9867 | 1.9486 |
| 180 | 4.1700 | 0.2398 | 2630.2 | 2838.7 | 8.0747 | 1.9518 |
| 200 | 4.3563 | 0.2296 | 2660.0 | 2877.8 | 8.1591 | 1.9576 |
| 220 | 4.5422 | 0.2202 | 2689.9 | 2917.0 | 8.2403 | 1.9652 |
| 240 | 4.7279 | 0.2115 | 2720.0 | 2956.4 | 8.3186 | 1.9742 |
| 260 | 4.9134 | 0.2035 | 2750.3 | 2996.0 | 8.3943 | 1.9840 |
| 280 | 5.0988 | 0.1961 | 2780.8 | 3035.8 | 8.4676 | 1.9946 |
| 300 | 5.2841 | 0.1892 | 2811.6 | 3075.8 | 8.5386 | 2.0057 |
| 320 | 5.4693 | 0.1828 | 2842.5 | 3116.0 | 8.6076 | 2.0173 |
| 340 | 5.6544 | 0.1769 | 2873.7 | 3156.5 | 8.6747 | 2.0292 |
| 360 | 5.8395 | 0.1712 | 2905.2 | 3197.2 | 8.7400 | 2.0414 |
| 380 | 6.0245 | 0.1660 | 2936.9 | 3238.1 | 8.8037 | 2.0539 |
| 400 | 6.2095 | 0.1610 | 2968.8 | 3279.3 | 8.8658 | 2.0665 |
| 420 | 6.3944 | 0.1564 | 3001.1 | 3320.8 | 8.9265 | 2.0794 |
| 440 | 6.5793 | 0.1520 | 3033.5 | 3362.5 | 8.9859 | 2.0925 |
| 460 | 6.7642 | 0.1478 | 3066.3 | 3404.5 | 9.0439 | 2.1058 |
| 480 | 6.9490 | 0.1439 | 3099.3 | 3446.7 | 9.1008 | 2.1192 |
| 500 | 7.1339 | 0.1402 | 3132.6 | 3489.2 | 9.1565 | 2.1327 |
| 520 | 7.3187 | 0.1366 | 3166.1 | 3532.0 | 9.2111 | 2.1464 |
| 540 | 7.5035 | 0.1333 | 3199.9 | 3575.1 | 9.2648 | 2.1601 |
| 560 | 7.6882 | 0.1301 | 3234.0 | 3618.4 | 9.3174 | 2.1740 |
| 580 | 7.8730 | 0.1270 | 3268.4 | 3662.1 | 9.3691 | 2.1879 |
| 600 | 8.0578 | 0.1241 | 3303.1 | 3706.0 | 9.4200 | 2.2019 |
| 620 | 8.2425 | 0.1213 | 3338.0 | 3750.1 | 9.4700 | 2.2160 |
| 640 | 8.4272 | 0.1187 | 3373.2 | 3794.6 | 9.5193 | 2.2301 |
| 660 | 8.6120 | 0.1161 | 3408.7 | 3839.3 | 9.5677 | 2.2442 |
| 680 | 8.7967 | 0.1137 | 3444.5 | 3884.4 | 9.6155 | 2.2583 |
| 700 | 8.9814 | 0.1113 | 3480.6 | 3929.7 | 9.6625 | 2.2724 |
| 720 | 9.1661 | 0.1091 | 3517.0 | 3975.3 | 9.7089 | 2.2865 |
| 740 | 9.3508 | 0.1069 | 3553.6 | 4021.1 | 9.7546 | 2.3006 |
| 760 | 9.5355 | 0.1049 | 3590.5 | 4067.3 | 9.7997 | 2.3147 |
| 780 | 9.7201 | 0.1029 | 3627.7 | 4113.7 | 9.8442 | 2.3288 |
| 800 | 9.9048 | 0.1010 | 3665.2 | 4160.4 | 9.8882 | 2.3428 |
u is not tabulated independently. Specific internal energy follows from the enthalpy and specific volume as u = h − p·v, with p in MPa and v in m³/kg (1 MPa·m³/kg = 1000 kJ/kg). At 0.5 bar (0.05 MPa) that pressure term is worth 495.2 kJ/kg at 800 °C, so u and h are far apart at high pressure and nearly equal at low pressure — a common source of error when the wrong column is read.
The first row is saturated vapour, at 81.32 °C. Below that temperature at 0.5 bar (0.05 MPa) the water is a liquid or a two-phase mixture, and this table does not apply — use the saturated tables instead.
Values are IAPWS-IF97, not interpolated. Every row is evaluated directly from the industrial formulation at that exact temperature, so there is no interpolation error between rows. If you need a temperature between the 20 °C steps, the calculator computes it exactly.