93 Products

Ingot (large, unfinished bars of aluminum) is the result of primary aluminum production. This material is not in a useful form for purchasers, so it is wrought into semifabricated mill products that include flat rolled products (foil, sheet, or plate, depending on thickness), rolled elongated products (wire, rod, or bar, depending on dimensions), drawn tube, extrusions, and forgings. Ingot is also furnished to foundries that remelt it to produce castings.

9.3.1 Wrought Products

Aluminum mills produce wrought products. ASTM specifications provide minimum requirements for wrought aluminum alloys by product (e.g., sheet and plate) rather than by alloy. Each ASTM specification addresses all the alloys that may be used to make that product. For example, ASTM B209 Sheet and Plate includes 3003, 6061, and all other alloys used to make sheet.

Tolerances on the dimensional, mechanical, and other properties of wrought alloys are given in the Aluminum Association's Aluminum Standards and Data [5]

and ANSI H35.2 Dimensional Tolerances for Aluminum Mill Products [16]. The two are the same, although they are revised at different dates and so may not match exactly until the next revision. The tolerances are standard tolerances (also called commercial or published tolerances). Special (either more strict or less strict than standard) tolerances may be met by agreement between the purchaser and the supplier. Tolerances approximately one-half of standard tolerances can usually be met if the purchaser so specifies.

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