特殊钢铸就海太长江隧道“钢筋铁骨”

Group 1 - The core point of the news is the successful application of the special steel Q690C, developed by Baogang Co., in the construction of the Haitai Yangtze River Tunnel, marking a significant advancement in high-end special steel materials [1][2] - Baogang Co. provided all the steel for the tunnel's embedded components, which are crucial for the foundation support and overall structural strength of large engineering projects [1] - The Q690C material is innovative as it replaces traditional carbon steel or low-alloy steel, meeting high performance requirements such as low-temperature toughness, high strength, fatigue resistance, impact resistance, corrosion resistance, and weldability [1] Group 2 - In response to the challenging order, Baogang Co. initiated a collaborative mechanism involving multiple units, including the technology center and steelmaking plant, to optimize the composition design and production process [2] - The company successfully rolled out over 3,000 tons of Q690C special steel after extensive verification of heat treatment processes [2] - The successful application of Q690C in the Haitai Yangtze River Tunnel not only signifies a major breakthrough for Baogang Co. in the high-end special steel sector but also highlights its technical strength and commitment to supporting national major projects [2]