This study investigates the influence of Mg content in a flat-rolled EN AW-AlSiMg(A) aluminum alloyAluminum alloy cast via twin roll castingCasting (TRC) technique. Silicon and magnesium are the main alloying elements along with minor additions of copperCopper and manganese. The chemical composition of the strip is systematically altered to obtain different modifications of the base alloy in order to observe the evolution in the microstructureMicrostructure, mechanical propertiesMechanical properties, softening behavior, and the corrosion behavior of the strip depending on magnesium content of the alloy. MicrostructureMicrostructure is analyzed by utilizing optical microscope and scanning electron microscope. The strength of the strips is tested both in the as-cast state and after processingProcessing. Complementary studies are conducted with electrical conductivityElectrical conductivity measurementsMeasurements and energy dispersive spectrometer analysis. The corrosion performance is tested with open circuit potential measurementsMeasurements, immersion tests, and AFM-SKPFM measurementsMeasurements. Increase in magnesium content retards recrystallizationRecrystallization and leads to slight deterioration in corrosion resistanceCorrosion resistance.