本规范涵盖了直接冷铸圆形材料（直径不超过9.0英寸）和矩形材料（横截面不超过10英寸×27.5英寸）（见8.4）形式的镁合金，用于固体应用的机械加工（见8.2.1）。

This specification covers a magnesium alloy in the form of direct chill strand cast round material up to 9.0 inch diameter and rectangular material up to 10 inch by 27.5 inch cross-section (see 8.4) for the purpose of machine from solid applications (see 8.2.1).