What are the export inspection/certification requirements for Q355 steel plates?
A: For standard exports, a Material Certificate (MTC) is provided, conforming to GB/T 1591/3274. SGS, BV, and TUV testing certifications, as well as a Certificate of Origin (CO/FORM A), can be provided upon customer request.
How is the weight of Q355 steel plate calculated?
A: Theoretical weight of steel plate = Thickness (mm) × Width (m) × Length (m) × 7.85 (density of steel, g/cm³). Foreign trade settlement is based on theoretical weight or actual weight, negotiable.
What is the price difference between Q355 steel plate and Q355B steel plate?
A: For the same specifications, Q355B is 50-100 RMB/ton more expensive than ordinary Q355 (Grade A). The higher the quality grade (D/E grade) and the more special the properties (weathering/bridge applications), the greater the price difference, approximately 100-300 RMB/ton. What is the minimum order quantity (MOQ) for Q355 steel plates?
A: Spot specifications can be ordered in small quantities (starting from 1 ton). Non-standard customization/direct delivery from the steel mill requires a minimum order based on coil weight/heat number. The standard MOQ is 20-50 tons, depending on the steel mill's requirements.
What is the warranty period for Q355 steel plates, and what is the warranty coverage?
A: 12-month warranty after delivery. The warranty coverage includes: chemical composition and mechanical properties (yield strength/tensile strength/elongation/impact energy) meeting national standards; surface quality and dimensional tolerances as agreed in the contract; and damage caused by human processing is not covered by the warranty.