Do I need to install anything?

No. It runs in any modern browser, free, with no account required.

For Hobbyists & Makers · Phase Diagram

Phase Diagram for a steel beam

Built for hobbyists & makers exploring it for fun. Play with real physics and math, no license and no setup — just open and tinker. Simulate a steel beam live below — adjust the inputs and watch it respond, right in your browser.

Phase Diagram (Water)Live

solid, liquid, gas

Controls

Presets

Temperature (°C)

Pressure log₁₀(kPa)

A phase diagram maps which state — solid, liquid, or gas — a substance takes at each temperature and pressure. The lines are phase boundaries; cross one and the material transforms. All three meet at the triple point, and the liquid-gas line ends at the critical point beyond which liquid and gas become indistinguishable.

▶ Run in Python

Data Inspector

Phaseliquid

Temperature25 °C

Pressure100 kPa

Governing equation

\frac{d P}{d T} = \frac{L}{T Δ V}, T = 298.1 K, P = 100 kPa

Reading this result: Liquid: warm enough to melt yet below the boiling line at this pressure, so the stable state is liquid water.

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Frequently asked questions

Is this good for hobbyists & makers?: Yes — this version of "Phase Diagram for a steel beam" is framed for hobbyists & makers exploring it for fun. Play with real physics and math, no license and no setup — just open and tinker.
Do I need to install anything?: No. It runs in any modern browser, free, with no account required.