NASA Engineering and Safety Center Technical Bulletin No. 26-07: Aluminum Alloy 2219 Material Guidance

Improper casting and forging processes in the manufacture of aluminum alloy 2219 can lead to microstructural defects that result in a sub-optimal response to anodic surface treatments and an increase in corrosion susceptibility. This Technical Bulletin communicates the risks of improper casting and recommends a homogenizing step followed by multidirectional deformation after conventional direct
chill casting, especially for larger castings.