The main varieties of hot-rolled steel plates are ordinary carbon steel, low alloy steel, container plate, weathering steel, pipeline steel, hot-rolled steel strip for automobiles, ship plate, gas cylinder steel, boiler and pressure vessel plate, A514 grade B quenched and tempered steel. Hot-rolled steel strips are processed into different finishing lines to become steel plate, flat coil and slit steel strip products. Our hot-rolled steel plates are widely used in automobiles, machinery, ships, bridges, construction, pressure vessels, pipeline transportation, automotive industry.
The development of modern high-strength steel, A514 grade B quenched and tempered steel is a process of gradually reducing the carbon content. The reduction of carbon content is beneficial to increase the toughness of steel on the one hand, and can significantly improve the welding performance of steel on the other hand. For large-scale steel structural parts with complex forces that require higher toughness and welding performance, a carbon content design of ≤0.10% is usually adopted.
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After extrusion, the A514 grade B quenched and tempered steel tube shall be removed for sizing. The sizing machine uses a cone-shaped bit to rotate into the steel embryo at high speed to drill holes to form steel pipes. The inner diameter of the steel pipe is determined by the outer diameter length of the drill bit of the sizing machine. After sizing, the steel pipe will enter the cooling tower and be cooled by water spray. After cooling, the steel pipe will be straightened. After straightening, the steel pipe is sent to the metal flaw detector (or hydraulic test) by the conveyor belt for internal flaw detection.
