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 The takeover bid was withdrawn after Alcan announced a friendly takeover by Rio Tinto in July 2007.Among Alcoa's other businesses are fastening systems, building products and Howmet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.
Obstetrics and Gynecology | Year: 2011
Objective: To estimate whether the Medicaid-Title XIX Sterilization Consent Form (SCF) format-"standard" compared with "low-literacy"- is associated with women's understanding of tubal sterilization. Methods:This study was a randomized trial that took place in an obstetrics and gynecology residency clinic in the southeastern United States. Women, aged 21 to 45 years, were randomly allocated to receive a copy of either the standard or the low-literacy Medicaid-Title XIX SCF. A research assistant assessed women's sociodemographic characteristics, health-literacy skills, and understanding of sterilization using items from the Postpartum Tubal Sterilization Knowledge questionnaire. Women were also queried regarding their preferences for either version of the Medicaid-Title XIX SCF. Rssults: We included 201 women in the study. Compared with women in the standard group (n=99), women in the low-literacy group (n=102) with no additional counseling better understood the length of time required between signing the form and undergoing sterilization (23.6% difference between groups, P<.01), the time interval until the form expired (33.7% difference between groups, P<.01), permanence of sterilization (15.7% difference between groups, P=.01), and that nonpermanent contraceptive options as effective as sterilization are available (8.2% difference between groups, P=.02). When given the choice to select either Medicaid-Title XIX SCF, 189 (94%) preferred the low-literacy version. CONCLUSION:: Our results support replacing the standard Medicaid-Title XIX SCF with the low-literacy version to foster increased understanding of sterilization. © 2011 The American College of Obstetricians and Gynecologists. Source
Alcoa | Date: 2015-06-23
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.
Alcoa | Date: 2015-08-04
A fastener adapted to pass through aligned holes through workpieces is disclosed. The fastener includes a pin member having a transition portion wherein the diameter of the transition portion decreases radially as it extends from the smooth cylindrical shank portion to the threaded portion. The fastener may also comprise a sleeve member and a clamping means. The clamping means includes a collar, a nut, or any other possible clamping means. In exemplary embodiments, the workpieces can be formed with a plurality of materials, the materials including composite, metallic, or composite/metallic structures, any combination thereof. In particular embodiments, the fastener has interference capability of 0.0005 to 0.0100 inches in composite structures without risk of composite delamination or damage. As a result of the fastener interference, gaps between the fastener and the structure are eliminated thereby providing good electrical conductivity between components. As a result, the potential for electrical sparks is reduced, providing a safer fastener for use with aerospace applications.