Specifications include, but are not limited to: A. Alloy 3003-H12. Aluminum is to be virgin Alloy #3003 H-12. If reprocessed Aluminum is to be used by bidder, This information must be noted on bid proposal. Also, reprocessed aluminum may contain #3003-H12 , #3105-H12 Alloy or #8112-H111 Material containing reprocessed aluminum may be required for running trials prior to acceptance. B. Thickness Gauge 20, (.032” + .003” - .000”) C. Coil Size Aluminum is to be in coiled rolls on cores with an I.D. of 20 inches minus 1 inch plus 2 inches, coil O.D. maximum 51”, minimum 42” D. Width Standard Size 12-1/8” Motorcycle Size 7 - 1/16” E. Ultimate Strength 17,000 to 23,000 ksi F. Minimum Yield Strength 12,000 ksi G. Elongation on 1/16” Standard specimen 15 to 20% nominal with 12% minimum H. Quality To withstand embossing with all steel dies at 3/32” dies at 3/32” height without breaking, cutting or appreciable plate warping. I. Surface Finish Treated with a light, tightly adherent, amorphous chromate conversion coating, Alodine 1200 or equal, applied in conformance with specifications outlined in ASTM specification B-449-67, Class 2, or as revised, and free of any powdery residue or oil or other foreign material, which may affect adhesion of reflective sheeting. Whereas the above may no longer be available Bonderite M-CR 1430C pretreatment is preferred with a back surface pretreatment or polyester wash coat. Bonerite 1455SF will not be accepted. J. Backside Surface Finish Finish will be free of any powdery residue, oil or other foreign material which may affect adhesion of reflective sheeting. K. Coating Weight 8 to 12 mg/sq. ft. with a median of 10 mg/sq.ft. as the optimum
