Q: What is the elastic modulus of Q235?
A: The elastic modulus E ≈ 206 GPa, consistent with ordinary steel.
Q: What is the Poisson's ratio of Q235?
A: Poisson's ratio μ ≈ 0.28~0.30.
Q: Is Q235 weldable?
A: Excellent weldability. Due to its low carbon content, it is less prone to cracking during welding. The commonly used welding electrode is J422 (E4303).
Q: Can Q235 be heat-treated?
A: Yes, but the strengthening effect of heat treatment is not significant. Common heat treatment processes are annealing (stress relief) and normalizing (grain refinement). Quenching + tempering is not suitable for strengthening.
Q: Can Q235 be cold-worked?
A: Yes, it has excellent cold-working properties such as cold stamping, cold bending, and cold drawing, making it suitable for manufacturing stamped and bent parts.