The use of aluminumAluminum extrusionExtrusion alloys in the automotiveAutomotive sector is increasing in response to the need for a reduction in the mass of battery electric and internal combustion engine vehicles. The microstructureMicrostructure of the material can be tailored by careful control of extrusionExtrusion conditions. In the current study, the microstructureMicrostructure was varied by modifying the billet temperature and the extrusionExtrusion ram speed. The mechanical propertiesMechanical properties were examined by conducting uniaxial tensile tests for naturally aged (T4) and artificially aged (T5/T6) tempers. It was observed that the yield and ultimate tensile stresses were lower in the material with a smaller grain size but the ductility as measured by the true strain to fracture was similar for the T4 temper materials regardless of grain size, while in the T5/T6 tempers the material with the larger grain size had a lower true strain to fracture compared to the smaller grain size material.