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The work presents a three dimensional graphical aid in which the fatiguelimit of notched components is plotted as a function of the notch stress concentration factorKtg and the equivalent notch length (á2.a+a0) to a0 ratio, a and a0 being the notch depthand the El Haddad material parameter respectively, while á is a shape coefficient. Thediagram is seen to fit with the same slope the experimental behaviour of the notches,thought of like short or long cracks respectively.