本文简述了贮箱材料、材料的焊接性及大型贮箱选材方案的发展。Al-Mg系合金焊接性能较好,但力学性能较低;Al-Cu-Mg-Si合金力学性能较好,但焊接性能较差,贮箱焊接技术较复杂。Al-Cu-Mn合金综合性能较好,近代已用于运载火箭、航天飞机的大型贮箱和密封舱体。 This article outlines the tank material, the weldability of the material and the development of a large tank option. Al-Mg alloy has better welding performance, but lower mechanical properties. Al-Cu-Mg-Si alloy has better mechanical properties but poor welding performance, and the welding technology of tank is more complicated. Al-Cu-Mn alloy overall performance is better, modern has been used for launch vehicles, space shuttle large tanks and sealed cabin.