GMNA GM6412M PDF

1 SCOPE.

The specification covers the requirements for wrought aluminum alloy sheet for use as automotive body and closures panels. Typical applications include hoods and lift-gates. This specification is applicable to two types of wrought aluminum alloys: age hardenable and non-age hardenable. Age hardenable (e. g., 6000 series) aluminum alloys can be used for exposed and unexposed applications. Due to surface character-istics, non-age hardenable (e. g., 5000 series) alloys may not be suitable for exposed applications. NOTE: Exposing work hardened 5000 series aluminum alloys containing more than about 3% magnesium to temperatures above 66°C (150°F) may result in susceptibility to Stress Corrosion Cracking. Therefore, non-age hardenable, 5000 series aluminum alloy grades in this specification may not be suitable for panels that are exposed to above ambient temperatures.