Q: What is the reference maximum load capacity of Q235 plate with common thickness (10mm)?
A: For a 10mm thick Q235 plate with a simply supported span of 1m and a width of 1m, the safe static load is about 1.5-2t. The actual load capacity is related to support form, span and load distribution, and it is recommended to calculate according to structural design specifications.
Q: What are the common surface defects of Q235 plate and their impacts on use?
A: Common defects include scratches, pits, delamination and cracks. Shallow scratches/pits (depth ≤0.5mm) have no effect on low-stress use; deep defects or delamination/cracks will reduce structural strength and weldability, and such plates are strictly prohibited for load-bearing parts.
Q: Can Q235 plate be cut by common cutting methods? What methods are applicable?
A: It can be cut by all conventional methods, including flame cutting (suitable for thick plates ≥6mm), plasma cutting (3-50mm medium and thin plates), shearing (≤20mm thin plates), and laser cutting (precision cutting of ≤12mm thin plates).
Q: What are the rust prevention storage requirements for Q235 plate?
A: Store in a dry and ventilated indoor warehouse, pad the bottom with sleepers (height ≥10cm) to avoid contact with ground moisture. Cover with waterproof plastic film for long-term storage, and avoid stacking with corrosive materials (e.g., acid, alkali).
Q: What are the alternative options for Q235 plate when higher strength is required?
A: The first choice is Q355 plate (yield strength 355MPa), which has good compatibility with Q235 in welding and processing. For higher strength requirements, Q420 and Q460 low-alloy high-strength steel plates can be selected. For special working conditions, alloy structural steel plates can be customized as required.