Adhering to GB/T 1591 (Q345B), EN 10025-2 (S355JR), and DIN 17100 (ST52) standards, this coil delivers 345-355MPa yield strength, 470-630MPa tensile strength, and 20%-22% elongation. With excellent weldability, cold forming, and impact toughness, it excels in structural engineering, heavy machinery, bridges, and offshore platforms. Its optimized alloy composition ensures durability in harsh environments, while cost-effective performance makes it ideal for high-load, long-span applications, driving efficiency and safety in industrial projects.