The main uses of flat steel are as follows. First, flat steel is used as a raw material for processing steel plates, which is convenient for transportation, takes up a small space, and can save transportation costs. Second, a573 grade 65 [450] plates flat steel can be used as raw material for processing welded pipes. Flat steel can be a finished steel product, or it can be used as a billet for welded pipes and thin slabs for stacked sheets. Third, flat steel can be directly used as a steel structure. As a finished material, flat steel can be used for making hoop iron, tools and mechanical parts, and used as building frame structure and escalator in construction. Fourth, the flat steel has a smooth surface and a certain degree of beauty.
a573 grade 65 [450] plates, 14MnNbq steel is used for building bridge, especially for pipe pile of sea crossing bridge. It is used for bridge guardrail. 14MnNbq material is also used to make highway bridges and railway bridges (including sea crossing bridges) with riveted and bolted structures. It is used to build long-span bridges, especially for the construction of long-span bolted or welded railway bridges.
Steel production and rolling technology and equipment also pursue the continuity between processes, such as the continuous a573 grade 65 [450] plates process between continuous casting and rolling mills, continuous casting slabs hot transfer hot charging, increased direct rolling, and continuous cold rolling processes. The development of controlled rolling and controlled cooling technology that combines rolling and heat treatment has played a huge role in improving the properties of rolled materials.
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