Weld Fatigue Life Calculator

Estimate fatigue life of welded joints using IIW fatigue classes (FAT) and S-N curve approach per Eurocode 3.

Applied stress range (max minus min stress).
MPa
IIW fatigue class. Butt weld: 90, Fillet: 71, Cruciform: 63.
Slope exponent. 3 for normal, 5 for post-threshold.
Safety factor on fatigue life. Typically 1.0-1.35.

Results

Fatigue Life-cycles
Design Life (with γ)-cycles
Damage at 2M cycles-
References: IIW Doc. XIII-2460; Eurocode 3 Part 1-9 — Fatigue