Specifications include, but are not limited to: Lump Sum Total for 120,000 lbs of Aluminum. A. Alloy 3105-H28 B. Thickness .022 + .002 inches C. Width Standard Size 12 1/8" + 1/32" D. Ultimate Strength Minimum 28,000 psi E. Minimum Yield Strength Minimum 24,000 psi F. Elongation 1/16” Standard Specimen, Minimum 6% G. Quality Aluminum must withstand rimming with all steel dies without breaking, cutting, or appreciable plate warping. H. Surface Finish 3105-H28 with a chrome pretreat coating. Chromate conversion coating, applied in conformance with specifications outlined in ASTM Specifications B-449-67 Class 2, or as revised, free of any powdery residue or oil or other foreign material, which may affect adhesion of reflective sheeting. I. Coating Weight 10 to 35 mg/ft2 with a median of 25 mg/ft2 as the optimum. J. Rolled Counter clockwise unwind
