What is the carbon content range of Q235?
C: 0.12%～0.22% (low carbon steel), Mn≤1.4%, Si≤0.35%.
What are the mechanical properties of Q235 (≤16mm)?
Yield strength: ≥235MPa
Tensile strength: 370～550MPa
Elongation: ≥20%
Impact energy (B/C/D): ≥27J
How does the yield strength of Q235 change with increasing thickness?
It decreases with increasing thickness:
16～40mm: 225MPa
40～60mm: 215MPa
60～100mm: 205MPa
What is the typical hardness of Q235?
Hot-rolled state: HB≤160, HRB≈95, low hardness, easy to process.
How is the weldability of Q235?
Excellent, low carbon, low impurities, commonly uses E43 series welding electrodes, low tendency to cold cracking.