1.1形式本规范涵盖标称直径或最小厚度为5.000英寸（含127.00 mm）的挤压棒材、棒材、线材、型材和管材形式的铝合金（见8.4）。1.2应用这些产品通常用于要求高拉伸财产和良好抗剥落腐蚀性的结构应用，但使用不限于这样的应用。

1.1 FormThis specification covers an aluminum alloy in the form of extruded bars, rods, wire, profiles, and tubing up to 5.000 inches, incl (127.00 mm, incl) in nominal diameter or least thickness (see 8.4).1.2 ApplicationThese products have been used typically for structural applications requiring high tensile properties and good exfoliation corrosion resistance, but usage is not limited to such applications.