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With the stronger HY-80 steel, this depth increased to 1,800 feet (550 m) and with HY-100 a depth of 2,250 feet (690 m). [2] The first production submarines to use HY-80 steel were the Permit class. These reportedly had a normal operating depth of 1,300 feet, roughly two-thirds the crush depth limit imposed by the steel. [2]
USS Iowa: Namesake: State of Iowa: Ordered: 28 April 2014 [1] Builder: General Dynamics Electric Boat, Groton, Connecticut: Laid down: 20 August 2019 [2] Sponsored by: Christie Vilsack: Christened: 17 June 2023 [3] Identification: Hull number: SSN-797: Motto "Our Liberties We Prize, Our Rights We Will Maintain" [4] Status: Under construction ...
The hull of the Albacore utilized HY-80 high-strength steel [3] with a yield strength of 80,000 psi (550 MPa), although this was not initially used to increase the diving depth relative to other US submarines. HY-80 remained the standard submarine steel through the Los Angeles class. [15] Other components were made from high-tensile steel (HTS ...
MSM-1 USEL was the first submersible vehicle for underwater research and work of completely Italian conception. The basic design of MSM-1 USEL was done by ESCO of Milan.The pressure hull is made of HY-80 steel and subdivided in two compartments: a cylinder with hemispherical ends located aft, and a sphere forward, interconnected by a cylindrical tunnel.
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After World War II, the Bureau of Ships conducted a research program for developing a high strength steel for ship and submarine construction. During testing, a variant of STS with modifications in carbon and nickel content and the addition of molybdenum, known as "Low-carbon STS", showed the best combination of all the desirable properties.
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The first submarine commissioned in the class was the ill-fated Thresher, and so the class was known by her name. When Thresher was lost on 10 April 1963, the class took the name of the second ship in the class, Permit. Thresher had numerous advanced design features and embodied the future of US Navy submarine design, and her loss was a serious ...