Supply the FB2 steel used for safety gate grade mechanical properties

Hot-rolled steel sheet / cold-rolled steel sheet: Steel ingots or slabs are difficult to deform at normal temperature and difficult to process. They need to be heated to 1100 ° C to 1250 ° C for rolling. This FB2 steel used for safety gate rolling process is called hot rolling. Rolling at room temperature is generally understood as cold rolling. However, from the point of view of metallurgy, the boundary between hot rolling and cold rolling should be distinguished by the temperature of metal recrystallization, that is, rolling below the recrystallization temperature is cold rolling; Rolling above the recrystallization temperature is hot rolling.

FB2 steel used for safety gate and so on medium and heavy plates are widely used in construction engineering, machinery manufacturing, container manufacturing, shipbuilding, bridge construction and so on fields. The surface quality problems of medium and heavy plates not only affect the appearance of the products, but also reduce the corrosion resistance, wear resistance, fatigue limit and other properties of the steel plate. Therefore, the medium and heavy plates manufacturers and users attach great importance to it. The surface quality of medium and heavy plate mainly refers to the surface smoothness, surface defects, etc., which is one of the main quality indexes of medium and heavy plates.

According to South Korea newsis reported on March 12, Korea iron and steel association statistics show that in February, South Korea's domestic FB2 steel used for safety gate steel exports to 2.44 million tons, down 2.4 percent year on year, after January down 3 percent, the second consecutive month of decline. In the past three years, South Korea's steel exports have decreased year by year, from 31.67 million tons in 2017 to 30.44 million tons in 2018 and 30.38 million tons in 2019. Instead, South Korea's FB2 steel used for safety gate steel imports increased last year. As China's economy slows and steel prices fall, Chinese steel is pouring into South Korea, analysts say.

30CrNi3MoV (code-named 675), FB2 steel used for safety gate, 30CrMnMoRE (code-named 603) and 30CrNi2MnMoRE (code-named 617) are steel plates for armored vehicles. 30CrNi3MoV steel is developed by V microalloying on the basis of the original Cr-Ni-Mo series low-alloy ultra-high-strength steel, and appropriately adjusting the content of other alloying elements.

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