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It is produced in many tempers, some of which are 7075-0, 7075-T6, 7075-T651. The first 7075 was developed in secret by a Japanese company, Sumitomo Metal, in 1935, [3] but reverse engineered by Alcoa in 1943, after examining a captured Japanese aircraft. [4] 7075 was standardized for aerospace use in 1945.
7068 alloy is a 7000 series aluminium-zinc alloy registered with the US Aluminium Association and produced to AMS 4331 (chemical composition and mechanical properties) and AMS 2772 (heat treatment). 7068 alloy ‘A’ and ‘B’ tensile data and fatigue properties have been ratified for inclusion in MIL Handbook 5 / MMPDS.
In 1971, Martin Marietta acquired Harvey Aluminum, a company which made aluminum oxide, aluminum ingot and aircraft grade aluminum sheet. Martin Marietta merged with Lockheed Corporation in 1995, and a year later, Martin Marietta Materials was spun off as an independent company, with Lockheed Martin retaining various aerospace , defense , and ...
Aluminium 7050 alloy is a heat treatable alloy. It has high toughness, high strength. It has high stress corrosion cracking resistance. [1] It has electric conductivity of value having 40 percent of copper. [2] 7050 aluminium is known as a commercial aerospace alloy. [3]
7475 aluminum alloy (Adirium) is a wrought alloy with high zinc weight percentage. It also contains magnesium, silicon and chromium. [1] 7475 alloy can not be welded. It has more spring back because of its strength. It has high machinability. [citation needed]
The three divisions were sheet, extrusion and foundry, with sheet being production of large flat aluminum pieces, extrusion being shaped profiles, and foundry being metal casting production. [5] [4] By the late 1940s, the Aluminum Association would recommence fulfilling its original purpose to promote the general welfare of the industry.