本规范涵盖挤压棒材、棒材、线材、型材和管材形式的铝合金，直径不超过1.000英寸（25.4 mm），最小厚度或管壁厚度（见8.7）。

This specification covers an aluminum alloy in the form of extruded bars, rods, wire, profiles, and tubing up to and including 1.000 inch (25.4 mm) in diameter, least thickness, or tube wall thickness (see8.7).