Q: What is the common thickness range of Q355 steel plate?
A: The common thickness range is 3mm-200mm. The conventional specification is 3mm-100mm, and the extra-thick plate of 100mm-200mm can be customized according to customer requirements. The thickness tolerance is in accordance with GB/T 709-2019 standard.
Q: What are the common width and length specifications of Q355 steel plate?
A: Common width: 1000mm, 1220mm, 1500mm, 1800mm, 2000mm, 2200mm, 2500mm;Common length: 2000mm, 2500mm, 3000mm, 6000mm, 12000mm.Non-standard width and length can be customized by cutting.
Q: Can Q355 steel plate be cold-formed?
A: Yes. Q355 steel plate has good cold formability and can be processed into various shapes (such as angles, channels, pipes, curved plates) through cold bending, stamping and other processes. For thick plates or complex forming, preheating is recommended to avoid cracking.
Q: What is the weldability of Q355 steel plate?
A: Q355 steel plate has excellent weldability and can be welded by various methods (arc welding, gas welding, resistance welding, submerged arc welding, etc.). No preheating is required for thin plates during welding; for plates with thickness >25mm or low-temperature welding, preheating to 80-150℃ is recommended to prevent cold cracks.
Q: Can Q355 steel plate be heat-treated?
A: Yes. Common heat treatment processes include normalizing, annealing and tempering. Normalizing treatment can refine the grain, improve the strength and toughness of the steel plate; annealing treatment can reduce the hardness and improve the machinability; tempering treatment can eliminate the welding stress and improve the structural stability.