Provided is a wrought aluminum alloy including 5.5 to 6.0 wt % of Zn, 2.0 to 2.5 wt % of Mg, 0.2 to 0.6 wt % of Cu, 0.1 to 0.2 wt % of Cr, at most 0.2 wt % (and more than 0 wt %) of Fe, at most 0.2 wt % (and more than 0 wt %) of Mn, at most 0.2 wt % (and more than 0 wt %) of Si, at most 0.1 wt % (and more than 0 wt %) of Ti, and at most 0.05 wt % (and more than 0 wt %) of Sr, with the remainder being Al.