Superheated Steam Table — 70 bar (7 MPa)
Specific volume, internal energy, enthalpy, entropy, density and isobaric specific heat of superheated steam at 70 bar (7 MPa), computed from IAPWS-IF97 — the same formulation the SimuPipe solver uses. Rows run from the saturation temperature (285.83 °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) |
|---|---|---|---|---|---|---|
| 285.83Sat. | 0.027380 | 36.5236 | 2580.9 | 2772.6 | 5.8146 | 5.3540 |
| 300 | 0.029494 | 33.9054 | 2633.4 | 2839.8 | 5.9335 | 4.2919 |
| 320 | 0.032015 | 31.2357 | 2693.8 | 2917.9 | 6.0674 | 3.5913 |
| 340 | 0.034232 | 29.2127 | 2745.9 | 2985.5 | 6.1796 | 3.2052 |
| 360 | 0.036260 | 27.5786 | 2793.2 | 3047.0 | 6.2783 | 2.9608 |
| 380 | 0.038158 | 26.2065 | 2837.3 | 3104.4 | 6.3677 | 2.7949 |
| 400 | 0.039962 | 25.0237 | 2879.4 | 3159.1 | 6.4501 | 2.6778 |
| 420 | 0.041694 | 23.9844 | 2919.9 | 3211.8 | 6.5272 | 2.5932 |
| 440 | 0.043369 | 23.0577 | 2959.4 | 3263.0 | 6.6000 | 2.5313 |
| 460 | 0.045000 | 22.2222 | 2998.1 | 3313.1 | 6.6694 | 2.4855 |
| 480 | 0.046594 | 21.4618 | 3036.3 | 3362.5 | 6.7358 | 2.4516 |
| 500 | 0.048159 | 20.7648 | 3074.1 | 3411.3 | 6.7997 | 2.4265 |
| 520 | 0.049697 | 20.1219 | 3111.7 | 3459.6 | 6.8614 | 2.4081 |
| 540 | 0.051214 | 19.5258 | 3149.1 | 3507.6 | 6.9212 | 2.3949 |
| 560 | 0.052713 | 18.9707 | 3186.4 | 3555.4 | 6.9793 | 2.3857 |
| 580 | 0.054196 | 18.4517 | 3223.7 | 3603.1 | 7.0358 | 2.3798 |
| 600 | 0.055664 | 17.9649 | 3261.0 | 3650.6 | 7.0909 | 2.3765 |
| 620 | 0.057120 | 17.5069 | 3298.3 | 3698.1 | 7.1447 | 2.3754 |
| 640 | 0.058565 | 17.0749 | 3335.7 | 3745.6 | 7.1973 | 2.3760 |
| 660 | 0.060001 | 16.6664 | 3373.2 | 3793.2 | 7.2488 | 2.3782 |
| 680 | 0.061428 | 16.2793 | 3410.8 | 3840.8 | 7.2993 | 2.3816 |
| 700 | 0.062847 | 15.9117 | 3448.5 | 3888.5 | 7.3488 | 2.3861 |
| 720 | 0.064259 | 15.5621 | 3486.4 | 3936.2 | 7.3974 | 2.3916 |
| 740 | 0.065664 | 15.2289 | 3524.5 | 3984.1 | 7.4452 | 2.3978 |
| 760 | 0.067064 | 14.9110 | 3562.7 | 4032.2 | 7.4921 | 2.4048 |
| 780 | 0.068459 | 14.6072 | 3601.1 | 4080.3 | 7.5383 | 2.4124 |
| 800 | 0.069849 | 14.3165 | 3639.7 | 4128.7 | 7.5837 | 2.4206 |
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 70 bar (7 MPa) that pressure term is worth 488.9 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 285.83 °C. Below that temperature at 70 bar (7 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.