Form This specification covers an aluminum alloy in the form of sheet and plate 0.051 to 8.000 inches (1.30 to 203.20 mm)@ incl@ in thickness. Application These products have been used typically for parts requiring moderate forming and where good welding characteristics@ moderate strength@ and good resistance to corrosion are important@ but usage is not limited to such applications. Excessive cold work or prolonged heating in the temperature range 150 to 300 ??(66 to 149 ?? may cause susceptibility to stress corrosion.