An international first! Xingcheng Special Steel’s world’s largest 9Ni steel for pressurized equipment with a thickness of 100mm.

Recently, Xingcheng Special Steel successfully used continuous casting process production and development of 100mm thick 9Ni steel and through the CCS, ABS and other nine national classification societies type test certification, breakthrough classification societies for the maximum thickness of 50mm specification limitations, to fill the field of domestic and foreign product gaps, marking the Xingcheng Special Steel in the large thickness of the pressurized equipment used in nickel low-temperature steel to achieve a major breakthrough in the field.

Marine 9Ni steel is mainly used in the storage and transportation of liquefied natural gas (LNG), which is one of the civil steel products with the highest level of technology, the greatest difficulty and the highest value-added products.In 2019, China’s largest LNG storage tanks have a capacity of only 160,000 cubic meters, and in 2022, the LNG storage tanks have grown to 270,000 cubic meters. Land-based ground LNG storage tanks use steel plate thickness is usually 5 to 36mm, offshore mobile storage tanks, fuel tanks, the general capacity of only a few thousand cubic meters, but it is much thicker than the land-based storage tanks, the maximum thickness of the tanks currently under construction has reached 56mm, more than the range of classification society specifications (≤ 50mm), the future of the pressurized equipment with nickel-based low-temperature steel in the direction of a greater thickness of the development of the trend is obvious, and the demand will be Increase year by year.

Due to the flammability and ultra-low temperature of liquefied natural gas, compared with the general low-temperature pressure vessels, its storage and transportation of cryogenic steel must have a comprehensive set of characteristics such as strength, thermal stress and strain, welding performance and corrosion resistance. On special important structures, in order to prevent accidents from occurring, the material must also be required to have resistance to brittle crack extension properties. Therefore, the ability to produce such products, is an important symbol of the overall technical level on behalf of a steel enterprise. 9Ni steel low-temperature impact toughness requirements are extremely high, billet crack sensitivity is extremely strong, long-term monopoly by foreign countries. Only in recent years, Xingcheng, South Steel and other medium and thick plate R & D strength of enterprises for localization, only to get substantial application.

Xingcheng Special Steel combined with special steel smelting experience, first-class equipment advantages and characteristics of high-quality 9Ni steel for continuous in-depth research and development and technology reserves, successfully developed the maximum thickness of 100mm pressure equipment with 9Ni steel and through the nine countries Classification Society type test certification. This is Xingcheng Special Steel in the development of difficult thick plate products in the practice of another leap forward, marking the thick plate production technology has reached the world’s first-class level, will further lead the clean steel, high alloy, high surface quality characteristics of a series of steel research and development, the optimization and upgrading of the product structure of the thick plate is of great significance.