1.1本规程提供了一个系统，用于指定自1952年以来商业上使用的非合金镁和镁合金，因此旨在作为非合金镁和镁合金的注册来源。表2给出了命名和已确定成分的记录。 1.2附录中所示的等效统一编号系统（UNS）合金名称符合规程E 527。

1.1 This practice provides a system for designating unalloyed magnesium and magnesium-alloys that have been used commercially since 1952, and thus is intended to be the registration source for unalloyed magnesium and magnesium-alloys. A record of designations along with the established compositions is given in Table 2. 1.2 The equivalent Unified Numbering System (UNS) alloy designations shown in the appendixes are in accordance with Practice E 527.