6061-T6 aluminum age hardens. 5 year old stock will have about double
the springback of fresh (weeks) old stock. Net: you will have to fiddle
with your bends on each run. Plus, your bend radius is 40x and 7x the
material thicknes, you will have difficulty gettting any kind of
consistentcy in the bends since you are not pushing the material to it's
yield point.

Wwj2110 wrote:
Im looking for info on predicting springback of 6061-T6 aluminum.
Specifically I want to know the punch radius for a part with a 1.08 r. Also I
need the springback factor for bending a 90 degree angle with a .18 r at the
bend.