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At present, the steel used in the H-shaped steel structure industry according to the German steel standards in China only accounts for about half of the total amount of steel in the country, which is significantly different from the proportion in developed countries. Domestic steel can basically meet the needs of steel structure processing, but there is still a gap compared to foreign countries in terms of specific varieties, specifications, and performance, such as high-strength large-sized ultra-thick H-beams, high-strength ultra-thick plates, etc. At present, Japan is promoting the use of high-strength Q690 grade steel in buildings and bridges, and has matured the use of Q960 mechanical steel.
The development of steel structures is constantly driving the development of high-performance steel. The current national standard "Design Code for Steel Structures" is being revised, and it is planned to include Q390, Q420, and Q460 in the code, changing the long-term situation where Q235 and Q345 are the main structural steel.
The production of steel structures in China is about 23 million tons, with an output value exceeding 300 billion yuan. The total amount of steel structures will maintain an annual growth rate, and by 2015, it will double to reach 50-65 million tons, accounting for about 15-20% of the total crude steel production in the country.
In the future, the variety, quality, and specifications of domestic steel should not only meet the needs of domestic and foreign steel structure development, but also meet the international application and development of high-performance steel in related fields; The products, accessories, and supporting technical products of steel structures have reached the international advanced level.
Highlighting the potential market and independent innovation technology development of steel structure residential buildings, steel structure bridges, non-standard and complete equipment manufacturing (including new energy wind power, nuclear power, smart grid, three in one, marine engineering steel structure network, etc.) with a large quantity and wide coverage, and a prominent proportion of output value in the industry, promoting the improvement of the quality of steel structure housing construction, improving the service life and actual lifespan of buildings, and promoting related supporting products The improvement and improvement of components have gradually made the steel structure industry a strategic emerging industry in China, with the initial goal of becoming a strong country in steel and steel structure.
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