What is Q235 steel coil?
Q235 is a common carbon structural steel specified in the Chinese national standard (GB/T 700). "Q" represents yield strength, and "235" indicates a yield strength ≥ 235 MPa. The steel coil is its hot-rolled/cold-rolled coil form.
What are the differences between the four grades Q235A/B/C/D?
Q235A: No impact test required, used only for static load structures.
Q235B: Passes impact test at room temperature (20℃), most commonly used.
Q235C: Passes impact test at 0℃, suitable for low-temperature environments.
Q235D: Passes impact test at -20℃, suitable for extremely cold/high-impact structures.
Is Q235 the same as A3 steel?
Yes, A3 steel is an older name; the current national standard uses Q235.
What are the main chemical components of Q235?
C≤0.22%, Si≤0.35%, Mn≤1.4%, P≤0.045%, S≤0.05%.
What are the common thicknesses and widths of Q235 steel coils?
Thickness: 1.2–20mm; Width: 600–2000mm.