Work out creep life estimate instantly with clear inputs, formula shown and shareable results.
The Larson-Miller parameter collapses temperature and time into one number: P = T(K) x (C + log t), with C usually near 20 for steels. Rearranged, rupture life is 10^(P/T - C). Because temperature sits in the denominator, a 20 K rise can cut creep life by more than half.
Larson-Miller
P = T x (C + log10 t), so t = 10^(P / T - C)
Preliminary estimate only. Creep and remaining-life assessment of pressure equipment must be performed by a qualified engineer using the applicable code and material master curves.
P = T x (C + log10 t), so t = 10^(P / T - C). The Larson-Miller parameter collapses temperature and time into one number: P = T(K) x (C + log t), with C usually near 20 for steels.
From the material's master curve of Larson-Miller parameter against stress, produced from short-term rupture tests at elevated temperature and published in the alloy data sheet.
This calculator takes 3 inputs: Metal temperature, Larson-Miller parameter, Larson-Miller constant C. The pre-filled defaults are a realistic worked example — replace them with your own site or project figures.