1/8/2017 · Industrial requirements for the cooling technology of continuous annealing lines for Al 6xxx alloys for strips are ï‚· Water-quench (controllable): Cooling rates Tï‚» 25 to 100 K/s ï‚· Temperature range: T = 480 to 250 Â C ï‚· Strip thickness: 0.5 to 5 mm ï