1.1形式本规范涵盖厚度为0.008至1.750英寸（0.203至44.450 mm）的薄板和板材形式的铝合金，在退火（O）条件下提供（见8.4）。如有规定，产品应在“制造”（F）状态下提供。1.2应用这些产品通常用于随后进行热处理的成型结构部件，1.2.1某些设计和加工程序可能导致这些产品易受压力影响- 热处理后的腐蚀开裂；ARP823建议将此类情况降至最低。

1.1 FormThis specification covers an aluminum alloy in the form of sheet and plate 0.008 to 1.750 inch (0.203 to 44.450 mm) thick, supplied in the annealed (O) condition (see 8.4). When specified, product shall be supplied in the “as fabricated” (F) temper.1.2 ApplicationThese products have been used typically for formed structural parts which will be subsequently heat treated, but usage is not limited to such applications.1.2.1 Certain design and processing procedures may cause these products to become susceptible to stress-corrosion cracking after heat treatment; ARP823 recommends practices to minimize such conditions.