本规范涵盖板材和板材形式的铝合金。主要用于结构用途，包括机器锥形零件。某些设计和加工程序可能导致这些产品在热处理后容易发生应力腐蚀开裂；ARP 823建议尽量减少此类情况。

This specification covers an aluminum alloy in the form of sheet and plate. Primarily for structural use, including machine tapered parts. Certain design and processing procedures may cause these products to become susceptible to stress-corrosion cracking after heat treatment; ARP 823 recommends practices to minimize such conditions.