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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 ] and eventually used for airframe production in the Imperial Japanese Navy . 7075 was reverse engineered by Alcoa in 1943, after examining a captured Japanese aircraft.
7075 may refer to: 7075 Sadovnichij, a main-belt asteroid discovered in 1979; 7075 aluminium alloy This page was last edited on 3 September 2020, at 19:09 (UTC) ...
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.
That must have been a mistake. The linked article Extra super duralumin and successive aluminium alloys for aircraft states that in 1935 the 7075 was developed. - 1935-Nen (Shōwa 10-nen) tōji sudeni chō jurarumiso (Super Duralumin) gōkin wa kaihatsu sa rete itaga Wildkatzen 09:22, 23 May 2019 (UTC)
2.84 g/cm 3: Ultimate tensile strength [3] 607 MPa Yield strength [3] 565 MPa Elongation at break [3] 11% Fracture toughness [3] 26.4 MPa-m½ Alternate designations.
Can be formed similar to 7075; Annealing provides superior formability and noticeable decline in workability following solution heat treatment; Form in “as-quenched” -W temper condition for best results [3]
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800 imp gal (3,600 L; 960 US gal) Firebox: ... Kitson 0-4-0ST was a class of 0-4-0 saddle tank steam locomotive designed for light shunting. History