D6AC 钢因其强度高、韧性好而且价格相对低廉,已广泛应用于宇航工业中。F111飞机和大力神ⅢC 导弹的主要部件都是由 D6AC 钢制成的,而且本计划也要求将这种合金应用于航天飞机计划中加以采用的固体火箭助推器壳体上。在航天飞机计划中,要求发射后从海洋上回收用过的壳体,并将其送往发射基地进行清理、整修和重复使用。该计划要求每个壳体能重复使用10～20次。由于这些结构需要长期暴露在各种水溶液环境中,因而对 D6AC 钢在 D6AC steel has been widely used in aerospace industry because of its high strength, good toughness and relatively low price. The main components of the F111 and Hercules III C missiles are all made from D6AC steel and the plan also calls for the alloy to be used on solid rocket booster housings used in the space shuttle program. In the space shuttle program, it is required that the used shell be recovered from the sea after launch and sent to the launch site for cleaning, refurbishment and reuse. The program requires 10 to 20 cycles per shell. Because these structures require long-term exposure to a variety of aqueous environment, thus D6AC steel in