1. Q690E steel plate is a high-strength steel plate, which is widely used in various heavy machinery and construction fields. The composition of its chemical composition has an important influence on its mechanical properties and processability.
2. The chemical composition of Q690E steel plate is mainly composed of carbon, silicon, manganese, phosphorus, sulfur and other elements, and also contains a certain amount of niobium, vanadium, titanium, chromium, nickel, copper, nitrogen, molybdenum, boron and aluminum and other alloying elements. The content and proportion of these elements are carefully designed and controlled, which makes Q690E steel plate have high strength, high toughness, good weldability and processing performance.
Carbon is one of the most important elements in Q690E steel plate, and its content is controlled at a low level to ensure the strength and toughness of the steel plate. Silicon and manganese are common alloying elements that can improve the strength and hardness of steel while maintaining good plasticity and toughness. Phosphorus and sulfur are common tramp elements, and their content is strictly controlled to ensure the stable performance of the steel plate.
3. In addition to the main elements, Q690E steel plate also contains a certain amount of niobium, vanadium, titanium, chromium, nickel, copper, nitrogen, molybdenum, boron and aluminum and other alloying elements. Although these elements are present in less abundant in steel, they have an important impact on the properties of steel. For example, niobium and vanadium can improve the strength and toughness of steel, titanium and chromium can improve the corrosion resistance of steel, nickel and copper can improve the low-temperature toughness of steel, and nitrogen and boron can refine the microstructure of steel and improve its strength and toughness.
Due to its excellent mechanical properties and processing properties, Q690E steel plate is widely used in various heavy machinery and construction fields. For example, lifting equipment, port machinery, bridge construction, steel structures, ships, pressure vessels, construction machinery, metallurgical equipment, mining machinery, hydraulic machinery, deck machinery, etc. These fields have high requirements for the strength, toughness and processing performance of steel plates, and Q690E steel plates can meet these requirements.
4. In short, Q690E steel plate, as a high-strength steel plate, has excellent mechanical properties and processing properties thanks to its unique chemical composition. By carefully designing and controlling the content and proportion of each element, the high strength and high toughness of Q690E steel plate are realized, which meets the requirements of various heavy machinery and construction fields.