Q: What are the mechanical properties of Q235 coil?
A: The main properties are yield strength ≥235MPa, tensile strength 375~500MPa, and elongation ≥26% (for thickness ≤16mm).
Q: What are the plasticity and toughness of Q235 coil?
A: Good plasticity, easy to stamp and bend; moderate toughness, Q235B/C/D grades can meet the impact toughness requirements at different temperatures.
Q: What are the weldability properties of Q235 coil?
A: Excellent weldability, can be welded using conventional methods such as arc welding and gas welding without preheating, suitable for manufacturing welded structural components.
Q: Can Q235 coil be heat-treated for strengthening?
A: Low-carbon steel has poor hardenability, and the strengthening effect of heat treatment is not obvious. Generally, it is not used to improve strength through heat treatment, and is mostly used directly in the hot-rolled state.
Q: What is the corrosion resistance of Q235 coil?
A: Its corrosion resistance is average. It is prone to rusting in humid environments and needs to be improved by painting, galvanizing, or other methods.