Fire-damaged Duralumin cross brace from the Zeppelin airship "Hindenburg" (DLZ129) salvaged from its crash site at Lakehurst Naval Air Station, NJ on May 6, 1937.

Duralumin (also called duraluminum, duraluminium or dural) is the trade name of one of the earliest types of age-hardenable aluminium alloys. The main alloying constituents are copper, manganese, and magnesium. A commonly used modern equivalent of this alloy type is AA2024, which contains 4.4% copper, 1.5% magnesium, 0.6% manganese and 93.5% aluminium by weight. Typical yield strength is 450 MPa (65 ksi), with variations depending on the composition and temper.^[1]

Duralumin was developed by the German metallurgist Alfred Wilm at Dürener Metallwerke Aktien Gesellschaft. In 1903, Wilm discovered that after quenching, an aluminium alloy containing 4% copper would slowly harden when left at room temperature for several days. Further improvements led to the introduction of duralumin in 1909.^[2] The name is obsolete today, and mainly used in popular science to describe the Al-Cu alloy system, or 2000 series as designated by the International Alloy Designation System (IADS) originally created in 1970 by the Aluminum Association.

Duralumin sample from the USS Akron (ZRS-4)

Its first use was in rigid airship frames eventually including the great German passenger Zeppelins LZ 127 Graf Zeppelin, LZ 129 Hindenburg, LZ 130 Graf Zeppelin II, and U.S. Navy airships USS Los Angeles (ZR-3, ex-LZ 126), USS Akron (ZRS-4) and USS Macon (ZRS-5) in the 1920s and 1930s. Its composition and heat treatment were a wartime secret. With this new rip-resistant mixture, duralumin quickly spread throughout the aircraft industry in the early 1930s, where it was well suited to the new monocoque construction techniques that were being introduced at the same time. Duralumin also is popular for use in precision tools such as levels because of its light weight and strength.

The earliest known attempt to use duralumin for a heavier-than-air aircraft structure occurred in 1916, when Hugo Junkers first introduced its use in the creation of the Junkers J 3's airframe, a single-engined monoplane that marked the first use of the Junkers trademark duralumin corrugated skinning. Only the covered wings and tubular fuselage framework of the J 3 were ever completed, before the project was abandoned - the slightly later Junkers J.I armored sesquiplane had its all-metal wings and horizontal stabilizer made in the same manner as the J 3's wings had been, along with the experimental and airworthy all-duralumin Junkers J 7 single seat fighter design, which led to the Junkers D.I low-wing monoplane fighter introducing all-duralumin aircraft structural technology to German military aviation in 1918.

Although the addition of copper improves strength, it also makes these alloys susceptible to corrosion. For sheet products, corrosion resistance can be greatly enhanced by metallurgical bonding of a high-purity aluminium surface layer. These sheets are referred to as alclad, and are commonly used by the aircraft industry.^[3]

Applications[link]

List of typical uses for the wrought Al-Cu alloys:^[1]

• 2011: Wire, rod, and bar for screw machine products. Applications where good machinability and good strength are required.
• 2014: Heavy-duty forgings, plate, and extrusions for aircraft fittings, wheels, and major structural components, space booster tankage and structure, truck frame and suspension components. Applications requiring high strength and hardness including service at elevated temperatures.
• 2024: Aircraft structures, rivets, hardware, truck wheels, screw machine products, and other structural applications.
• 2036: Sheet for auto body panels.
• 2048: Sheet and plate in structural components for aerospace application and military equipment.
• 2141: Plate in thicknesses of 40 to 150 mm (1.6 to 5.9 in) for aircraft structures.
• 2218: Forgings; aircraft and diesel engine pistons; aircraft engine cylinder heads; jet engine impellers and compressor rings.
• 2219: Welded space booster oxidizer and fuel tanks, supersonic aircraft skin and structure components. Readily weldable and useful for applications over temperature range of -270 to 300 °C (-454 to 572 °F). Has high fracture toughness, and the T8 temper is highly resistant to stress-corrosion cracking.
• 2618: Die and hand forgings. Pistons and rotating aircraft engine parts for operation at elevated temperatures. Tire molds.

References[link]

Takumi Saito
Greeting fans, circa 2011.
Nationality	Japanese
Occupation	Actor, model, singer

Takumi Saito (斎藤工, Saitō Takumi^?, born August 22, 1981) is a Japanese actor, model and singer.

Movies[link]

• Phoenix Wright: Ace Attorney - The Movie (working title) (2012) as Miles Edgeworth
• Saijo no Meii (2011) (2010) as Saijo Mikoto
• Space Battleship Yamato (2010) as Yamamoto
• Thirteen Assassins (2010) as Makino Uneme
• Shibuya (2010)
• Akumu no Elevator (2009) as Jun Ogawa
• Cafe Seoul (2009) as Jun Isaka
• Vampire Girl vs. Frankenstein Girl (2009) as Jugon Mizushima
• RoboGeisha (2009) as Hikaru Kageno
• Hammer Head Man (2009) ( Elite Yankee Saburo spin-off ) as Riki
• 20th Century Boys: Final (2009)
• Shinjuku Incident (2009)
• Kujira (2009) as Maruha
• Elite Yankee Saburo as Kita no Riki (2009)
• Syun Kin Syou(2008) as Sasuke
• Akanbo Shojo - Tamami: The Baby's Curse (2008) as Takaya Yoshimura
• Clearness (2008) as Ryo
• Itsuka No Kimi He (2007) as Noboru Fukami and Ryuu Fukami
• A! Osara Ni Kubi Ga Notteiru! (2007) as Odagiri
• Sukitomo (2007) as Tomokazu Aoi
• Boys Love (2006) as Noel Kisaragi
• Zura-Deka - The Rag Cop (2006) detective Yatsuda
• Ulysses (2006) as Sarai
• Dance Master (2006) as Momochi Shintaro
• The Prince of Tennis (2006) as bystander
• Karasu wa naite iruka? (2006)
• Kabuto-Oh Beetle (2005) as Hametsu Oh Disaster
• Umizaru (2004) as Shinji Tadokoro
• Toki no Kaori - Remember Me (2001) as Yuuji

TV shows[link]

• "Hanazakari no Kimitachi e (2011 TV series)" (Fuji TV, 2011) as Hokuto Umeda
• GeGeGe no Nyōbō (NHK, 2010) as Akira Komine^[1]
• Chase - Kokuzei Sasatsukan (NHK, 2010) as Kiichi Hiyama
• Fumou Chitai (Fuji TV, 2009) as Makoto Iki
• Otokomae! 2 (NHK, 2009) as Takeda Shinsaburo
• Gokusen Graduation Special '09 (NTV 2009) as Mamiya
• Mito Komon (TBS 2009)Season 39 Ep.14 as Yamazaki Shingo
• Oya Koukou Play (MBS 2008) as Yuuzo
• Otokomae! (NHK, 2008) as Takeda Shinsaburo
• Shichinin no Onna Bengoshi (TVasahi, 2008) Ep. 5 as Momotarou
• Full Swing (NHK, 2008) as Hiroshi Wakamatsu
• Kaze no Hate (NHK, 2007) as Sugiyama Shikanosuke
• Este (2007) as Shikishima Shichiri
• Delicious Gakuin (2007) as Carlo Sasayama
• Princess Princess D (TV Asahi, 2006) as Shuuya Arisada
• GARO (TV Tokyo, 2005)
• Umizaru TV (Fuji TV, 2005) as Shinji Tadokoro
• Higuchi Ichiyo Monogatari (TBS, 2004) as Baba Kochou
• Tokyo michi ka (Fuji TV, 2004)
• Katouke he Irasshai (Nagoya TV, 2004) as Nakamura Youichi
• Be-Bop High School (TBS, 2004) as Ikeda Tsuyoshi
• Ai to Shihon Shugi (WOWOW dramaW, 2003) as Takashi
• RPG - Role Playing Game (NHK, 2003) as Tatsuya Ishiguro
• Taiho shichauzo (You're Under Arrest) (TV Asahi, 2002) as Mizushima Tomoya

Stage Performances[link]

• 乱-Run - (2009)
• Musical Tennis no Ohjisama The Imperial Presence Hyotei Gakuen feat. Higa Ver. Tokyo gaisenkouen (2008) as Yuushi Oshitari
• Musical Tennis no Ohjisama Dream Live 5th (2008) as Yuushi Oshitari
• The Family 絆(2007)
• Soratobu John to Manjiro (2007) as Toranosike Momoi
• Men & Man (2006) as Tsutomo
• Musical Tennis no Ohjisama Advancement Match Rokkaku Chuu feat. Hyotei Gakuen (2006) as Yuushi Oshitari
• Musical Tennis no Ohjisama Dream Live 3rd (2006) as Yuushi Oshitari
• Musical Tennis no Ohjisama The Imperial Match Hyotei Gakuen in winter 2005-2006 (2005) as Yuushi Oshitari
• Musical Tennis no Ohjisama The Imperial Match Hyotei Gakuen (2005) as Yuushi Oshitari
• Jump Festa Bleach (2004) as Ichigo Kurosaki

Discography[link]

• Musical Tennis no Ohjisama Best Actor Series 004

• Saigo no Christmas [limited edition CD single]

• Kokoro no Gururi - [Album]

Radio Shows[link]

• Takumizm(2009)
• Takumizm(2008)
• Takumizm(2007)
• Bug A Map (Bay 78fm, 2006)

DVDs Special[link]

2008 Search for my roots in Thailand Chapter 1- Chapter 2-Chapter 3

2007 Search for my roots in China Chapter 1 - Chapter 2 - Chapter 3

2006 "CALLING" Idol dvd

Photobook[link]

2008 "NIRAI KANAI" [1] [2]

2007 NIPPON DASSHUTSU 1981

2006 NO BORDER

References[link]

External links[link]

• Official website
• Official Blog
• Official Fanclub
• Official Movil Site
• Wikipedia Japanese article on 斎藤工