<p>Due to the growing importance of aluminum alloys for lightweight sheet metal parts in the automotive industry, stretch flangeability of aluminum alloys is one of the critical parameters in the overall assessment of their formability. In this work, stretch flangeability of five different aluminum alloys (AA2024, AA5083, AA5754, AA6061, and AA7075) and two grades of steel (DP600 steel and extra-deep drawing steel) has been investigated by numerical simulation of the hole expansion test along with characterization of their tensile properties and anisotropy. The hole expansion tests were carried out to validate the predicted hole expansion ratio, major and minor strains, and thinning at failure. It has been found that AA5754 and AA6061 exhibited the highest hole expansion ratio among the Al alloys studied in the present work which is significantly higher than that of DP600 steel but lower than that of extra-deep drawing steel. AA2024 and AA5083 also exhibited higher stretch flangeability than DP600 steel, making these four alloys potentially suitable for lightweight sheet metal parts involving stretch flanging where very high strength is not an essential requirement.</p>