Creep Life Calculator

Predict creep rupture life using the Larson-Miller parameter method for high-temperature materials.

Service Temperature

°F

Applied Stress

MPa

Rupture LMP (×10³)

LMP Constant (C)

Tab to move between fields

Predicted Rupture Life

12,055,615.99 hours

Safety Factor (vs 100k hrs)

120.56×

Temperature923.15 K

LMP Value25,000

How to Use This Calculator

Enter the Service Temperature (°C) at which the component operates.
Input the Applied Stress (MPa) on the component.
Set the Rupture LMP (×10³) from the material's Larson-Miller rupture data curve.
Enter the LMP Constant (C) — typically 20 for steels (from material data sheets).
Read Predicted Rupture Life (hours) and Safety Factor to evaluate service life margins.

How the result changes with Rupture LMP (×10³)

Service Temperature: Operating temperature of the component. Higher temperatures accelerate creep.
Applied Stress: Constant stress applied to the component during service.
Rupture LMP (×10³): Larson-Miller parameter at the given stress level from material data (in thousands). Read from material creep rupture curves.
LMP Constant (C): Material-dependent Larson-Miller constant. Typically 20 for most engineering alloys.

Identify Input Parameters
4 parameters
Service Temperature = 650, Applied Stress = 100, Rupture LMP (×10³) = 25, LMP Constant (C) = 20 = 4 input(s) provided
Calculate Predicted Rupture Life
12055615.99 = 12055615.99
Calculate Safety Factor
Safety Factor
120.556 = 120.556
Calculate Temperature
Temperature
923.15 = 923.15
Calculate LMP Value
LMP Value
25000 = 25000