We're welding mtb bike frames in Europe and we've had the hardest time finding heat treaters for ALU 6061. We have a good vendor in the UK, but shipping back and forth is a costly nightmare. We're trying to work with Heatmasters locally, but we sent a test batch through them and the material came back too soft. They showed us a graph that indicated the test material had been solution annealed at 986 F for 30 minutes then quenched in water then aged at 350 F for 8 hours. This material seemed like it was T4 at best though. We're having it tested, but has anyone encountered something like this? We're desperate for answers here. Also, how long after aging does 6061 set at T6 (10-12 hours? is it hard right out of the oven?) Sorry for being such a newbie here, but i'm kind of between a rock and a hard place...