Yu-8 Torpedo
Yu-8 (鱼-8) torpedo was developed as the electrically-powered counterpart of the Otto-fuel-II-powered Yu-6, with which it shares many components and technologies, with the exception of the propulsion system.
Domestic Chinese sources have said that the Yu-8 torpedo had become the test vehicle and subsequently the first torpedo to be armed with a new warhead developed by the Chinese naval research institute. The new warhead utilizes sodium hydride compounds / chemical reaction; on detonation a large amount of sodium powder is released, which reacts with seawater to produce large amounts of very-high-temperature hydrogen within a very short period of time, so that the temperature instantly increases to over 2,000 °C within a radius of a few dozen metres as the hydrogen reacts with oxygen, destroying the target even if not hit. During the test in East China Sea, a retired 12,000-ton ship was struck by two Yu-8 torpedoes, which completely melted the side of the ship within fifteen minutes.
Read more about this topic: Yu-6 Torpedo