Hot-rolled steel sheets are produced by rolling steel slabs at high temperatures (above recrystallization temperature), resulting in materials with uniform structure and excellent ductility. They exhibit high strength, good formability, and cost-effectiveness, making them widely used in construction, automotive, machinery, and shipbuilding industries. Common grades include Q235 and Q345, offering varying mechanical properties for different applications. These sheets are ideal for structural components, bridges, containers, and general fabrication due to their ability to withstand heavy loads and harsh environments. Their surface finish may require additional coatings for corrosion resistance, but they provide a reliable foundation for diverse engineering needs.
Production Method and Uses of Hot-Rolled Steel Sheets
Hot-rolled steel sheets are manufactured by heating steel billets or slabs above their recrystallization temperature (1,000–1,300°C) and rolling them into thin, flat profiles through roughing and finishing mills. This process enhances ductility and uniformity while reducing internal stress. After rolling, sheets are cooled (air or water) and may undergo surface treatment (e.g.,酸洗, galvanization). These sheets are widely used in construction (structural beams, bridges), automotive manufacturing (body panels, frames), machinery, shipbuilding, and containers. Their high strength, formability, and cost-effectiveness make them ideal for heavy-duty applications requiring load-bearing capacity and durability. Common products include coils, plates, and structural shapes like I-beams and H-sections.
