Details of investigation and analysis of steel con

Details of investigation and analysis of steel use trend in China's steel downstream industry

details of investigation and analysis of steel use trend in China's steel downstream industry

information on China's construction machinery

Guide: the trend of steel use reduction, steel strength increase, thickness thinning, and the market trend of steel reduction in downstream industry. Under low-carbon pressure, the steel standards will be improved, and the reduction of steel will become a trend. Construction, automobile, home appliance, container, construction machinery and other steel industries have proposed the 12th Five Year Plan

quantitative reduction trend of steel used -- the market trend of quantitative reduction of steel in downstream industries with increasing steel strength and thinning thickness. Under the pressure of "low carbon", the steel standards will be improved, and "reduction" of steel will become a trend. Steel industries such as construction, automobile, home appliance, container and construction machinery have put forward the requirements for steel reduction in terms of high strength, corrosion resistance, lightweight, long life and recyclability in the "12th Five Year Plan", which will inevitably affect the increase of steel quantity and the improvement of steel quality

reinforced concrete buildings need higher strength steel. Among the 130 million tons of building reinforcement, 60% are grade I steel and grade II steel with yield strength less than 335mpa. The promotion of hot-rolled reinforcement greater than 400MPa can reduce the consumption of reinforcement by about 10million tons on the basis of increasing the implementation of building formwork. GB code for design of concrete structures has been implemented since July 1, 2011. It is required to give priority to the use of 400MPa steel bars, actively promote the use of 500MPa steel bars, replace hpb235 plain round steel bars with hpb300 plain round steel bars, gradually reduce the use of 335mpa steel bars and finally cancel this variety

the proportion of automobile high-strength steel plates will be further increased. At present, the strength of automobile steel plate has been increased from the previous 200 ~ 30 first group to the level of 500 ~ 1000MPa in terms of congestion time and road sections during the festival, which has greatly improved the strength level of automobile steel. In the future, the proportion of ultra-high strength steel with strength higher than 590MPa will be further increased and will gradually be in line with international standards

with the increase of dimensional stability, the steel used for containers tends to be lightweight and thinner, which not only reduces the weight, but also expands the effective volume ratio of containers. The proportion of thin plates for containers will increase significantly. In addition, in order to meet the needs of different cargo transportation, special containers such as insulation containers, tank containers, bench containers and animal containers came into being and developed rapidly. The changes in these needs put forward higher requirements for steel materials and corrosion resistance, and the demand for duplex stainless steel and low temperature resistant (-60 ℃) low alloy structural steel increased

the new feature of household appliance steel is that household appliance steel tends to be lightweight, beautiful and energy-saving. With the upgrading of household electrical appliances, the proportion of coated steel plates, stainless steel plates, aluminized zinc plates, wide width plates and other plates with high surface requirements, antibacterial, heat dissipation and other new functional steel plates has increased, and the demand for high-grade electrical steel, high-strength steel plates, hot-rolled pickling plates, environmental protection post-treatment steel plates has increased rapidly

the comprehensive performance requirements of steel - wear resistance, impact resistance, fatigue resistance, low temperature toughness, corrosion resistance, corrosion resistance, weather resistance steel will be more applied. Compared with ordinary carbon steel, the corrosion resistance of corrosion-resistant and weather resistant steel is increased by 2-8 times, so it has the advantages of long service life, saving resources and reducing energy consumption. It is widely used in container, railway rolling stock, bridge construction, ocean engineering, petrochemical equipment and other industries. At present, the development of high-rise buildings and steel structures, the construction of cross sea bridges, offshore oil production platform equipment and supercritical and ultra supercritical carbon elements widely exist in nature. The development of thermal power generating units and the industrial upgrading of petrochemical industry have continuously improved the requirements for the corrosion resistance of weathering and corrosion-resistant steel

during the 12th Five Year Plan period, developing and producing high-performance and low-cost weathering and corrosion-resistant steel, opening up new application fields and expanding usage will become one of the main tasks of optimizing the variety structure of the steel industry. In addition to the traditional use of weathering steel and corrosion-resistant steel in container, railway rolling stock, bridge construction and other industries, some new fields have also begun to use weathering and corrosion-resistant steel, such as shipbuilding industry

for construction machinery plates with special requirements, some construction machinery plates should have wear resistance, impact resistance, fatigue resistance, low temperature toughness and corrosion resistance in addition to general strength, stiffness and welding performance. Construction machinery plates with special requirements are the key varieties to be developed in the future

Architecture -- new requirements for the production and use of steel for steel structures. From the perspective of safety and reliability, it is required to have high toughness and low yield strength ratio. Considering the improvement of processability, it is required to reduce the carbon equivalent and crack sensitivity coefficient, and also have a certain ability to resist lamellar tearing. In consideration of durability and safety, corrosion resistance, weather resistance, fire resistance and seismic resistance are required

ships -- new requirements of green environmental protection for steel. Nippon Steel and Japan__ With the cooperation of postal and shipping companies, the company took the lead in developing high corrosion-resistant thick steel plates for the bottom surface of oil silos of oil tankers in the world and put them into practice. This is a steel plate developed to prevent the corrosion of the bottom surface of the oil bunker in oil leakage accidents. It is a steel plate to improve the safety of ships and protect the earth's environment. The corrosion resistance of this steel plate is about 5 times that of ordinary thick steel plate, so there is no need to carry out anti-corrosion coating, so there is no need to use coatings and organic solvents, making the ship an environment-friendly ship

petroleum -- new requirements for steel due to poor geological conditions and new processes. Key high-end products: X80 steel grade welded pipes with better performance, X90 and higher steel grade welded pipes, high-strength steel pipes meeting the low-temperature toughness requirements of -45 ℃, large deformation resistant pipeline steel and welded pipes, deep-sea oil and gas pipeline steel pipes, acid service steel pipes, etc

bridge steel - high performance steel. Compared with the past, from the perspective of further improving the strength, fracture toughness, weldability, corrosion resistance and processability required for bridge steel, the material that improves various properties to the best range is "high performance steel BHS"

machinery - Requirements for steel products in product upgrading. In the traditional equipment manufacturing industry, steel for construction machinery is developing towards high-strength, high wear resistance and special performance steel; Wind power equipment should improve the service life of bearing steel, which requires improving the purity of bearing steel (reducing inclusions); Forgings for heavy machinery should solve the problems of machining capacity and heat treatment level; Steel for general machinery should be developed into free cutting steel, non quenched and tempered steel, silver bright steel and other varieties