本规范涵盖包铝片形式的铝合金，包铝片的核心晶粒尺寸应为ASTM第6号或更细。该片通常用于严重成型的结构零件，这些零件随后将进行热处理和涂漆或以其他方式防腐，但用途不限于此类应用。某些设计和加工程序可能会导致该板材在热处理后容易发生应力腐蚀开裂；SAE ARP 823建议将此类条件降至最低。

This specification covers an aluminum alloy in the form of alclad sheet whose core grain size shall be ASTM No. 6 or finer.This sheet has been used typically for severely formed structural parts which will be subsequently heat treated and painted or otherwise protected from corrosion, but usage is not limited to such applications.Certain design and processing procedures may cause this sheet to become susceptible to stress-corrosion cracking after heat treatment; SAE ARP 823 recommends practices to minimize such conditions.