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(ASTM B479 Foil for Flexible Barrier Applications). Standard household foil is approximately 0.0006 in. thick, or about \ the thickness of the paper used in this book, while capacitor foil is four times thinner. In many packaging applications, foil is laminated to paper or plastic films for strength.

Fin stock is coiled sheet or foil in specific alloys (1100, 1145, 3003, and 7072), tempers, and thicknesses (0.004-0.030 in.) used for the manufacture of fins for heat exchangers.

Sheet is one of the most widely used aluminum products and is produced in more alloys than any other aluminum product. Sheet is available rolled into coils with slit edges or in flat sheets with sheared, slit, or sawed edges. Circular blanks from coil or flat sheet are available. Panel flat sheet is flat sheet with a tighter tolerance on flatness than flat sheet. The maximum weight of a coil is about 9900 lb (4500 kg). Coils are available in standard widths such as 24, 30, 36, 48, 60, and 72 in., and up to about 108 in. (2740 mm). Commonly available widths for flat sheet are 96, 120, and 144 in. Aluminum sheet gages are different from steel sheet gages, so it's better to identify aluminum sheet by thickness rather than gage number to avoid confusion.

Plate is available in thicknesses up to about 8 in. (200 mm) in certain alloys; single plates may weigh up to 7900 lb (3600 kg). Circular plate blanks are available. Common widths and lengths for plate are similar to those for sheet.

Sheet and plate tolerances have been established for width, length, deviation of edges from straight, squareness, and flatness. Thickness tolerances are different for alloys specified for aerospace applications (including 2014, 2024, 2124, 2219, 2324, 2419, 7050, 7150, 7178, and 7475) than for other alloys. The ASTM specification for sheet and plate is B209, Sheet and Plate.

A number of sheet and plate products are made for specific applications by the primary producers. These include tread plate (ASTM B632 Rolled Tread Plate) made with a raised diamond pattern on one side to provide improve traction, duct sheet, and roofing and siding, available in corrugated and other shapes.

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