Q: What are the tensile strength and yield strength ranges?
A: Tensile strength 270–410 MPa; Yield strength 130–260 MPa (Rp0.2≤280 MPa).
Q: What are the elongation after fracture requirements?
A: δ5≥28%, ensuring no cracking during cold bending and stamping.
Q: What is the hardness range?
A: HB 80–120, Vickers HV 90–130, relatively soft and easy to process.
Q: How is the cold bending performance?
A: No cracking after 180° cold bending, bending mandrel diameter d=0.5t–1t (t is plate thickness), suitable for bending parts.
Q: How is the weldability?
A: Low carbon + low sulfur and phosphorus, excellent weldability, suitable for arc welding, resistance welding, and laser welding, with good toughness after welding.