Knowledge of the mechanical properties of a material is vital for the design of mechanical structures subject to cyclic loading, and the correct dimensioning of machine elements depends, in particular, on the fatigue limit. However, the tests performed to determine such a fatigue limit usually require the use of multiple test specimens, making them very costly, being cyclically loaded until failure occurs, and very time consuming. With this in mind, Krapez proposed a new method, which focuses on the observation of the thermal behaviour of the component over a series of applied loads, in order to find the stress level from which there is a variation of this behaviour that theoretically occurs in conjunction with the beginning of fatigue damage. This way, it is possible to determine the fatigue limit of a material using a single specimen, being cyclically loaded during a small number of cycles to stress levels, which would make this method a considerably cheaper alternative than the traditional means, and delivering results much faster. The objective of this project is to verify if the method described by Krapez can be used to determine the fatigue limit of a material and if the result obtained matches what can be seen in the literature. Using the resources of the Photomechanical Laboratory, four tests were performed using an infrared camera to observe the surface temperature of the test specimen in use. The obtained data was then compared with the equation proposed by Krapez to verify if the proposed method is feasible or not.