Today, increasing energy demand and human consumption are becoming increasingly important for the safe use, storage and transport of energy resources. Energy sources have been the target of increasing terrorism and wars since the 20th century. In the future, alternative energy sources, such as hydrogen energy, are expected to take the place of fossil energy resources. This means that ballistic threats will target these resources. In this study, for the first time in the literature, the ballistic behavior of Type 1 metallic pressurized hydrogen storage tanks made of the 6061 T6 aluminum and SS304 stainless steel alloys at the different thicknesses against 7.62 mm were investigated under usage pressure. For these alloys, the minimum safe wall thickness of the hydrogen tank is mathematically calculated using finite element analysis. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.