Superheated Steam Table — 90 bar (9 MPa)
Specific volume, internal energy, enthalpy, entropy, density and isobaric specific heat of superheated steam at 90 bar (9 MPa), computed from IAPWS-IF97 — the same formulation the SimuPipe solver uses. Rows run from the saturation temperature (303.35 °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) |
|---|---|---|---|---|---|---|
| 303.35Sat. | 0.020493 | 48.7973 | 2558.4 | 2742.9 | 5.6790 | 6.4762 |
| 320 | 0.022710 | 44.0331 | 2629.5 | 2833.9 | 5.8348 | 4.7670 |
| 340 | 0.024861 | 40.2231 | 2695.8 | 2919.6 | 5.9769 | 3.9023 |
| 360 | 0.026721 | 37.4241 | 2752.0 | 2992.5 | 6.0940 | 3.4328 |
| 380 | 0.028402 | 35.2082 | 2802.4 | 3058.0 | 6.1959 | 3.1400 |
| 400 | 0.029963 | 33.3740 | 2849.1 | 3118.8 | 6.2875 | 2.9425 |
| 420 | 0.031437 | 31.8097 | 2893.2 | 3176.1 | 6.3715 | 2.8031 |
| 440 | 0.032844 | 30.4468 | 2935.5 | 3231.1 | 6.4497 | 2.7018 |
| 460 | 0.034200 | 29.2398 | 2976.6 | 3284.4 | 6.5234 | 2.6270 |
| 480 | 0.035514 | 28.1576 | 3016.7 | 3336.3 | 6.5933 | 2.5710 |
| 500 | 0.036795 | 27.1773 | 3056.2 | 3387.3 | 6.6601 | 2.5287 |
| 520 | 0.038049 | 26.2821 | 3095.1 | 3437.5 | 6.7243 | 2.4967 |
| 540 | 0.039279 | 25.4591 | 3133.7 | 3487.2 | 6.7861 | 2.4726 |
| 560 | 0.040489 | 24.6982 | 3172.1 | 3536.5 | 6.8460 | 2.4545 |
| 580 | 0.041682 | 23.9912 | 3210.3 | 3585.4 | 6.9040 | 2.4411 |
| 600 | 0.042860 | 23.3316 | 3248.4 | 3634.2 | 6.9605 | 2.4316 |
| 620 | 0.044026 | 22.7140 | 3286.5 | 3682.7 | 7.0155 | 2.4251 |
| 640 | 0.045180 | 22.1338 | 3324.6 | 3731.2 | 7.0691 | 2.4211 |
| 660 | 0.046324 | 21.5872 | 3362.7 | 3779.6 | 7.1216 | 2.4192 |
| 680 | 0.047459 | 21.0709 | 3400.8 | 3828.0 | 7.1728 | 2.4191 |
| 700 | 0.048586 | 20.5821 | 3439.1 | 3876.4 | 7.2231 | 2.4205 |
| 720 | 0.049706 | 20.1184 | 3477.4 | 3924.8 | 7.2724 | 2.4232 |
| 740 | 0.050819 | 19.6776 | 3515.9 | 3973.3 | 7.3207 | 2.4270 |
| 760 | 0.051927 | 19.2578 | 3554.5 | 4021.9 | 7.3682 | 2.4318 |
| 780 | 0.053029 | 18.8575 | 3593.3 | 4070.6 | 7.4149 | 2.4374 |
| 800 | 0.054127 | 18.4751 | 3632.2 | 4119.4 | 7.4608 | 2.4438 |
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 90 bar (9 MPa) that pressure term is worth 487.1 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 303.35 °C. Below that temperature at 90 bar (9 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.