Friction stir welding and near net spin forming of friction stir welded aluminum blanks were investigated for large-scale pressure vessel applications.  With a specific focus on thin gage 2xxx and 7xxx aluminum alloys, the program concentrated on the following: the criteria used for material selection, a potential manufacturing flow, and the effectiveness and associated risks of near net spin forming.  Discussion will include the mechanical properties of the friction stir welds and the parent material from before and after the spin forming process.  This effort was performed under a NASA Space Exploration initiative focused on increasing the affordability and performance of pressure vessels larger than 10-ft diameter.