中国最大推力新一代运载火箭长征五号的芯级直径5m,外围的4个助推器直径3.35m,身高约57m,芯级火箭推进剂为-253℃的液氢与-183℃的液氧,助推器推进剂为液氧与煤油,其巨大的贮箱是用铝合金板焊的,是用铝最多的部件,用的是哪种铝合金,未见媒体报道,但笔者认为应该是用2219型合金焊的,连接环也应用此类合金环锻的。文章对2219型合金作了较详细的介绍。 China’s largest new generation launch vehicle Long March V core diameter of 5m, the outer four booster diameter of 3.35m, height of about 57m, core rocket propellant -253 ℃ liquid hydrogen and -183 ℃ liquid oxygen , Booster propellant for the liquid oxygen and kerosene, the huge tank is welded with aluminum alloy plate, is the most aluminum parts, which is the use of aluminum alloy, no media reports, but I think it should be With type 2219 alloy welding, the connecting ring is also used for such alloy ring forging. Article 2219 alloy made a more detailed introduction.