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Alcoa Inc. is the world's third largest producer of aluminum, behind Rio Tinto Alcan and Rusal, with corporate headquarters in New York City. From its operational base in Pittsburgh, Pennsylvania in the United States, Alcoa conducts operations in 31 countries. Alcoa is a major producer of primary aluminum, fabricated aluminum, and alumina combined, through its active and growing participation in all major aspects of the industry: technology, mining, refining, smelting, fabricating, and recycling. Aluminum and alumina represent more than three-fourths of Alcoa’s revenue. Non-aluminum products include precision castings and aerospace and industrial fasteners. Alcoa’s products are used worldwide in aircraft, automobiles, commercial transportation, packaging, building and construction, oil and gas, defense, and industrial applications.In May 2007 Alcoa made a US$27 billion hostile takeover bid for Alcan, aiming to unite the two companies and form the world's largest aluminum producer. The takeover bid was withdrawn after Alcan announced a friendly takeover by Rio Tinto in July 2007.Among Alcoa's other businesses are fastening systems, building products and Howmet Castings. The sale of the packaging unit was announced on December 21, 2007 and closed in the first quarter of 2008. Wikipedia.

An analysis system for determining one or more operating conditions of a metal electrolysis cell and for facilitating a response is provided. The analysis system comprises a bath probe electrically interconnected to a portable computing device. The bath probe generates signals associated with temperature measurements produced from thermal communication with an electrolysis cell bath. The portable computing device may receive these signals and generate data based thereon. The data may be transformed into operating condition information relating to the electrolysis cell.

Alcoa | Date: 2015-04-28

A fastener includes a pin member, a swage collar, and an insert. The pin member includes an elongated shank portion, a head, a threaded portion having an external thread and a plurality of lock grooves, and a pull portion. The swage collar includes a shank having a flange and a through bore with a first interior portion extending from a first end of the collar to a stepped portion and forming a first inner wall having a first inner diameter, and a second interior portion extending from the stepped portion to a second end of the collar and forming a second inner wall having a second inner diameter. The insert includes a through bore forming an inner wall that has an internal thread adapted to engage the external thread of the pin member.

Alcoa | Date: 2015-10-13

In one embodiment, a brazing sheet comprises: a core layer, a braze liner on the first side of the core layer; and a waterside liner on the second side of the core layer. The core layer is comprised of a 3xxx series aluminum alloy. The waterside liner is an aluminum alloy comprising: 7-20 wt % Zn; up to 0.25 wt % Si; up to 0.1 wt % Cu; up to 0.25 wt % Mn; up to 0.1 wt % Mg; and up to 0.1 wt % Cr. In some embodiments, the brazing sheet has a thickness of 60-180 microns. In some embodiments, the waterside liner comprises 1-15% of the thickness of the brazing sheet.

A clip for assembling corners of hollow members such as the rails and stiles of an extruded aluminum door. The clip has an L shape and may feature a double L shape. A portion inserts into the hollow of a first member and is attached thereto. Another portion extends into the other hollow member for attachment thereto to form a sturdy joint without welding. Pairs of clips may be used at each corner.

Alcoa | Date: 2015-10-15

A method comprises fusion welding a filler metal to a first aluminum component; wherein the first aluminum component comprises a 7xxx series aluminum alloy; and wherein the filler metal comprises an aluminum alloy, in weight percent: up to 0.15 Fe; up to 0.15 Si; from 2.3 to 2.7 Mg; from 1.4 to 1.8 Cu; from 6.0 to 9.0 Zn; and from 0.06 to 0.14 Zr. In some embodiments, the 7xxx series aluminum alloy comprises 0.5-2.6 wt. % Cu. In some embodiments, the filler metal comprises, in weight percent, up to 0.45 Sc.

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