Q: What is the typical delivery condition for Q235 steel plates?
A: They are usually delivered in hot-rolled condition, but controlled-rolled and normalized conditions can also be provided upon request.
Q: What is the core difference between Q235 and Q355 steel plates?
A: The core difference is in yield strength. Q235 yield strength ≥ 235 MPa, while Q355 ≥ 355 MPa. Q355 has superior overall mechanical properties compared to Q235.
Q: Does Q235 steel plate have a corresponding international grade?
A: There is no completely corresponding international grade. It is similar to the EU's S235JR and the US's A36, but the chemical composition and performance indicators differ, and they cannot be directly substituted.
Q: What is the upper limit for carbon content in Q235A steel plates?
A: The upper limit for carbon (C) content is 0.22%.
Q: What are the requirements for sulfur and phosphorus content in Q235D steel plates?
A: Sulfur (S) ≤ 0.035%, Phosphorus (P) ≤ 0.035%, which is the lowest sulfur and phosphorus content among the four grades.