By analysing several finite-life fatigue curves obtained at various tempera
tures, a relation describing the temperature dependence of fatigue strength
is proposed, based on the Basquin equation. Accordingly, an approximate in
verse law between fatigue strength and the square root of absolute temperat
ure is demonstrated. Moreover, a boundary temperature above which creep beg
ins to play a significant role is estimated. A simple extension of the rela
tionship to the low-cycle fatigue region, allows one to determine predictiv
e curves describing fatigue behaviour at various temperatures, even in case
s where only a single fatigue curve at a given temperature plus the tempera
ture dependence of tensile strength are known.