The manufacturing of thin aluminium-steel clad strips by means of twin-roll casting is a prospective trend of the progress in the light metals sheet production. The resulting composite possesses high bonding strengths due to the presence of a continuous thin layer of intermetallic phases at the bonding interface of metallic constituents. At the same time, for the application of twin-roll cast clads, the evaluation of their properties is of great importance. In order to determine the behavior of twin-roll cast aluminum-steel clad strips under loading, quasi-static monotonic and high-cycle fatigue tests were carried out. Therefore, strips in the as-cast state as well as after a heat treatment, stimulating the growth of the intermetallic phases, were subject for the characterization. In addition, the specimen’s fracture surfaces were analyzed by using scanning electron microscopy to obtain information on the type of fracture, the location and source of the crack nuclei.