Ballistic and Hurricane Resistant Aluminum Isotec uses a 6061-T6 aluminum alloy for our doors and frames in our Safety Entrances™. The 6061 alloy has 64{0da0b4c47deb7adb6cb4b94258fb97930383627607256e0b73b442c6f21152f9} greater strength to weight Read More » June 20, 2016