Q: What is the tolerance range for Q235 steel coils?
A: Thickness tolerance is classified according to precision grade. For ordinary precision (PT.A), the thickness tolerance is ±0.3mm to ±0.8mm (increasing with thickness). For higher precision (PT.B), the tolerance can be controlled within ±0.15mm to ±0.5mm.
Q: Can Q235 steel coils be leveled?
A: Yes. Leveling machines can cut coils into flat sheets of specified lengths to meet the size requirements of different users.
Q: What factors affect the price of Q235 steel coils?
A: The price is affected by factors such as raw material (iron ore, coke) prices, market supply and demand, specifications (thickness, width), processing requirements (pickling, oiling), and transportation costs.
Q: What documents are required for exporting Q235 steel coils?
A: Typically, a commercial invoice, packing list, bill of lading, certificate of origin, and material certificate (including chemical composition and mechanical property test data) are required.
Q: What are the chemical composition requirements for Q235 steel coils?
A: Carbon (C) ≤ 0.22%, Manganese (Mn) ≤ 1.4%, Silicon (Si) ≤ 0.35%, Sulfur (S) ≤ 0.045%, Phosphorus (P) ≤ 0.045% (Q235A); Q235D has even lower requirements for sulfur and phosphorus content (S ≤ 0.035%, P ≤ 0.035%).