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Applications of titanium on ships

Titanium and its alloy in seawater and ocean atmosphere corrosion resistance, light specific gravity, high strength, impact resistance, no magnetic, sound transmission, small coefficient of expansion, is considered as a good ship material. In recent years, the application of titanium in ships has attracted much attention. The naval forces and shipbuilding industries of various countries also attach great importance to the application of titanium in ships, and many brands of titanium alloy for ships have been developed. Titanium and its alloys are widely used in ships, such as hull structures, deep-sea survey ships and submarine pressure housings, pipes, valves, rudders, shaft supports, fittings, thrusters and propeller shafts in power drives, heat exchangers, coolers, sonar deflectors of ship hulls and so on.

Titanium was first used in the hull of the Soviet Union's alpha class submarines. Subsequently, titanium was used in both artificial and unmanned deep-sea research and deep-sea aid submarines. Industrial pure titanium is used for general structural parts and Ti-6al-4V alloy is used for pressure vessels. According to reports, titanium in the hull structure can not only reduce the weight of the hull, increase the effective loading weight, but also reduce maintenance and prolong the service life of the ship. Aluminum alloy, mild steel and other hull structure materials, generally 10 years to maintain, and titanium almost does not need maintenance and repair, the life can be extended from the general 20 years or so to 30 ~ 40 years.
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