Q500D steel plate belongs to low-alloy high-strength structural steel plate. Q500D steel plate itself not only has high strength, but also has high toughness, and at the same time carries some comprehensive high-quality properties of steel plates such as wear resistance, weather resistance, fatigue resistance, impact resistance, and easy welding and processing. Therefore, Q500D steel plates are mainly used in the manufacture of workshops, general buildings and various construction machinery and other structural parts.
Q500D steel plate surface quality
1. Defects harmful to use such as cracks, air bubbles, scars, folds and inclusions are not allowed on the surface of the steel plate. There shall be no delamination on the side of the steel plate. If there are surface defects mentioned above, cleaning is allowed. The cleaning depth shall be calculated from the actual size of the steel plate, and shall not exceed half of the thickness tolerance of the steel plate, and the minimum thickness of the steel plate shall be guaranteed. Defect cleaning should be smooth without edges and corners.
2. Other defects are allowed, and their depth is calculated from the actual size of the steel plate, and shall not exceed half of the allowable thickness tolerance, and it shall be ensured that the thickness of the steel plate at the defect is not less than the allowable lower limit thickness of the steel plate.
3. Welding repair is allowed for the steel plate. If welding repair is performed after quenching and tempering treatment, quenching and tempering treatment should be carried out again.
4. The surface quality can be in accordance with the provisions of GB/T14977.
