Baotou Steel Union (Tianjin) Iron and Steel Co., Ltd. announced that its independently developed Q690D-grade high-strength steel plate has successfully passed the certification of DNV·GL, an internationally authoritative organization. This marks that the global competitiveness of this product in fields such as offshore engineering and wind power equipment has reached a new level. The simultaneously launched zero-carbon electric arc furnace smelting technology has reduced the carbon emissions in the steel plate production to 1.8tCO₂/t, a decrease of 65% compared with traditional processes. As a core steel service provider in North China, Baotou Steel Union, with its diversified product matrix including Q690D steel plates, seamless steel pipes, I-beams, etc., continues to provide low-carbon solutions for fields such as new energy and infrastructure construction.
Q690D Steel Plate: Combining High Strength and Environmental Protection Performance, Empowering Global Super Projects
As a high-strength steel with a yield strength of 690MPa, the Q690D steel plate not only has the properties of fatigue resistance, low-temperature resistance (impact toughness at -20°C), but also excellent welding performance. It has been applied to iconic projects such as the Shanghai Tower and the Kazakhstan Pavilion at the World Expo. Its dimensions cover a thickness range of 8-150mm and a width range of 1,600-3,900mm, meeting the requirements of harsh scenarios such as deep-sea platforms and LNG storage tanks. This DNV·GL certification has further opened up the offshore wind power market in Northern Europe, and it is expected that the annual export volume will exceed 100,000 tons.
Zero-carbon Electric Arc Furnace Technology: A Full-chain Carbon Reduction Practice from Smelting to Finished Products
By adopting hydrogen-based reduction and AI intelligent temperature control technologies, near-zero carbon dioxide emissions are achieved during the smelting process. This technology has been successfully applied in the production of Q690D steel plates, as well as the supporting I-beams and angle steels, and also empowers the manufacturing of seamless steel pipes. Taking the hot-expanded seamless steel pipe with a specification of Φ426×12mm as an example, its carbon footprint has been reduced by 50% compared to traditional processes, making it the preferred material for the China-Russia Natural Gas Pipeline project.
Synergy of Diverse Products: Seamless Steel Pipes and Profiled Materials Construct the "Steel Skeleton" of Infrastructure
In addition to the Q690D steel plate, Baotou Steel Union (Tianjin) Iron and Steel Co., Ltd. focuses on the layout of differentiated products:
Seamless Steel Pipes: The 15CrMoG steel pipes for petroleum cracking have a yield strength of 460MPa, and are used in the high-pressure water injection system of the Bohai Oilfield. The service life of the equipment is increased by 30%.
I-beams: The Q355B hot-rolled I-beams adopt the TMCP process, and the grain size reaches ASTM Grade 8. They support the large-span column-free design of a high-speed railway station building in Tianjin, reducing the steel consumption by 20%.
Channel Steel and Angle Steel: The combination of cold-formed channel steel conforming to the JIS G3350 standard and weather-resistant steel angle steel is used in the photovoltaic bracket system in Xiongan New Area, and its salt spray resistance life exceeds 15 years.
Innovative Application: 690MPa-grade Square Steel Opens up a New Track for Tunnel Engineering
Relying on the technical accumulation of Q690D, Baotou Steel Union (Tianjin) Iron and Steel Co., Ltd. has recently successfully developed 690MPa-grade square steel for tunnel embedded parts, breaking through the bottlenecks of low-temperature toughness at 0°C and the quenching and tempering process. The first batch of 500 tons of products has been delivered to the tunnel project of the Sichuan-Tibet Railway. This product has a tensile strength of 730MPa, which is 25% lighter than traditional carbon steel. It is expected that the annual demand will exceed 4,000 tons, becoming a new growth point in the infrastructure field.
Future Strategy: Dual-driven by Digitalization and Globalization
Baotou Steel Union (Tianjin) Iron and Steel Co., Ltd. plans to build an intelligent warehousing center in 2025, enabling laser coding traceability for products such as steel plates and I-beams. Combined with blockchain technology, it will create a full-process quality tracking system from raw materials to end products. At the same time, it will promote the market layout along the routes of the Belt and Road Initiative. The goal is to increase the export proportion of Q690D steel plates and supporting profiled materials to 30% within three years, contributing to the global carbon neutrality goal.
