1.1 FormThis specification covers an aluminum alloy in the form of extruded bars, rods, wire, profiles (shapes) and tubing.1.2 ApplicationThese extrusions have been used typically for structural applications requiring a combination of high tensile andcompressive strength and good corrosion resistance, but usage is not limited to such applications.1.3 Certain processing procedures may cause this product to become susceptible to stress-corrosion cracking;ARP823 recommends practices to minimize such conditions.