China can't make steel for aircraft carriers.

This problem was solved several years ago. It is said that the technology is imported from Russia, and Angang is responsible for producing steel for aircraft carriers, but its performance is not as good as that of the United States, Russia, France and Japan, and its output is relatively low. Aircraft carrier special steel, different from ordinary steel, has low light yield and can be welded well. There are also many very strict technical indicators, such as high temperature resistance, corrosion resistance, fracture resistance, fatigue resistance, good toughness, magnetic insulation and so on. Moreover, a good aircraft carrier special steel is a very good alloy, which is obtained after a very long period of research and testing, and there are more than a dozen alloy elements in it. If you don't know the exact proportion of these elements, smell them. Special steel for aircraft carrier also has extremely high requirements for welding. The higher the strength, the greater the thickness and the more alloying elements of aircraft carrier special steel, the stricter the requirements for welding and heat treatment process. For example, special steel with yield strength above 700 MPa needs preheating and post-heat treatment when welding, otherwise it will produce welding cold cracks and other defects. Not only in technology, but also in welding materials. For example, GeeFLUX52 1 flux and GRIDUCT- 100 coated covered electrode were specially developed in order to use domestic high-strength steel. Different fluxes, different covered electrode or different chemical compositions will cause great differences in welding results of high-strength steel. This is why so few countries can develop steel for aircraft carriers, and the United States strictly blocks the technology of this material.