New Demand For Steel Structure For Building Steel Structure
The use of steel with steel will become a trend. The steel industry of construction, automobiles, home appliances, containers, construction machinery and other steel industries has proposed 'twelve five -five' to save the requirements of high -strength, corrosion resistance, lightweight, long life, recyclable steel reduction requirements for the use of steel. The increase in the number of steels will be increased and the quality of steel is increased.
Reinforced concrete buildings require higher -intensity steel. Among the 130 million tons of building steel bars, 60%are class Ⅰ steel and II steel bars with a yield strength of less than 335MPa. The hot -rolled steel bars greater than 400MPa can reduce the consumer reinforcement by about 10 million tons. From July 1, 20 years, the GB50010-2010 "Specifications for the Design of Concrete Structure" requires priority to use 400MPA-grade steel bars to actively promote 500MPA steel bars. Use HPB300 light round steel bars to replace HPB235 light round steel bars, gradually reduce the use of 335MPA steel bars and ultimately eventually Cancel this variety.
The proportion of car high -strength steel plates will be further increased. At present, the strength of automotive steel plates has increased from the previous 200 to 300MPA level to 500 to 1000MPa, which greatly improves the strength of automotive steel. In the future, the proportion of ultra -high steel with a level of 590MPA level will be further increased and will gradually be in line with international standards.
The container's steel tends to lightweight and reduce the weight, while reducing the weight while expanding the effective plot ratio of the container. The proportion of the container will increase significantly. In addition, in order to meet the needs of different cargo transportation, special containers such as insulation containers, cans, tablet containers, and animal containers have emerged and developed rapidly. The changes in these needs have been higher on the material and corrosion resistance of steel materials and corrosion resistance. The requirements for double-phase stainless steel and low-temperature (-60 ° C) low alloy structure have increased.
The new characteristic of home appliances is the tendency of home appliances to lightweight, aesthetic, and energy saving. With the upgrading of home appliances, the proportion of new functional steel plates such as coating steel plates, stainless steel plates, aluminum -plated zinc plates, wide -scattered plates, etc. in home appliance products increases the proportion of new functional steel plates such as antibacteriality and heat dissipation. The demand for electrician steel, high -strength steel plates, hot -rolled acid washing plates, and environmental protection processing steel plates has increased rapidly.
Comprehensive performance requirements of steel-wear resistance, impact resistance, fatigue resistance, low temperature toughness, corrosion resistance, weathering resistance, and weather-resistant steel will get more applications. Compared with ordinary carbon steel, the corrosion resistance of corrosion resistance and weather resistance has increased by 2 to 8 times, so it has the advantages of long life, saving resources and reducing energy consumption. Engineering and petrochemical equipment industries. At present, the development of high -rise buildings and steel structures, the construction of cross -sea bridges, the development of marine oil collection platform equipment and the development of supercritical, super critical thermal power generation units, and the industrial upgrading of the petrochemical industry to the weather resistance and corrosion corrosion resistance of steel and corrosion keep improving.
