The Q420D steel plate is a high-strength steel plate, and the Q420D steel plate implements the "GB/T 1591-2018 Low Alloy High Strength Structural Steel" standard. This standard stipulates that Nb, V, and Ti microalloying elements can be added to the steel, and the Q420D steel plate is required to have high strength and low temperature impact toughness in terms of performance. Combined with the use and processing technology of Q420D steel plate, Q420D steel plate also needs to have good drawing and cold heading properties.
The chemical composition directly affects the comprehensive performance of Q420D steel plate. According to research, the strength increment of Nb-containing steel mainly depends on grain refinement, which can not only improve the strength and toughness of Q420D steel plate, but also reduce the brittle transition temperature.
Q420D steel plate is suitable for towers, various cranes, heavy trucks, oil derricks, high-temperature fans, large electric shovels, dump trucks and drilling rigs, coal mine hydraulic supports, steel structures, etc.
