Low-Carbon and Green Steel: How the Construction Industry is Reducing Carbon Emissions

The steel construction industry is undergoing a transformative shift toward low-carbon and green steel technologies as global pressure mounts to reduce carbon emissions in the building and construction sector. With buildings and construction accounting for approximately 37% of global energy-related carbon dioxide emissions, the decarbonization of structural materials has become a critical priority. Jidian Construction Materials Co., Ltd., headquartered in Xiamen, Fujian, China, is actively engaged in this transition, sourcing lower-carbon steel for its 360,000 tons of annual steel structure production serving 50 countries worldwide.

Traditional steel production via blast furnace and basic oxygen furnace (BOF) routes generates approximately 2.0 to 2.4 tons of carbon dioxide per ton of steel produced, making steel one of the most carbon-intensive industrial materials. However, emerging green steel technologies, powered by renewable energy and innovative production processes, are dramatically reducing the carbon footprint of structural steel, opening new possibilities for sustainable construction across the 2,000+ completed projects that companies like Jidian are delivering globally.

Electric Arc Furnace (EAF) Technology: The Current Pathway to Lower-Carbon Steel

Electric arc furnace (EAF) steelmaking represents the most commercially mature pathway to reducing the carbon intensity of structural steel. Unlike blast furnaces, which rely on coal and iron ore, EAF furnaces use electricity to melt recycled steel scrap, producing steel with approximately 75% lower carbon emissions. In regions with abundant renewable electricity, such as hydropower-rich Scandinavia or solar-rich regions, the carbon savings can be even greater.

Jidian Construction Materials Co., Ltd. increasingly specifies EAF-sourced structural steel for its fabrications, particularly for projects pursuing green building certification under LEED, BREEAM, or similar rating systems. With 1,000,000 square meters of annual enclosure output, the company's adoption of EAF steel is making a meaningful contribution to reducing the embodied carbon of buildings across its global project portfolio. The company provides environmental product declarations (EPDs) documenting the recycled content and carbon footprint of its steel products, supporting clients' sustainability reporting and certification goals.n goals.

Green Hydrogen: The Future of Zero-Carbon Steel

While EAF technology offers significant carbon reductions, it is limited by the availability of recycled steel scrap and still relies on fossil-fuel-generated electricity in many regions. The next frontier in green steel is the use of green hydrogen as a reducing agent in direct reduced iron (DRI) production, replacing natural gas and eliminating carbon dioxide emissions from the reduction process.

Several pioneering steel companies are investing in hydrogen-based DRI technology, with pilot plants already operational in Europe and Australia. When powered by renewable electricity, green hydrogen DRI can produce steel with near-zero carbon emissions. While commercial-scale production is still several years away, the technology holds immense promise for the steel construction industry's long-term decarbonization goals. Jidian Construction Materials Co., Ltd. is monitoring these developments closely and plans to incorporate green hydrogen steel into its supply chain as it becomes commercially available.ble.

Carbon Capture, Utilization, and Storage (CCUS) in Steel Production

For existing blast furnace steel mills that cannot easily transition to EAF or hydrogen DRI technology, carbon capture, utilization, and storage (CCUS) offers a pathway to reduce emissions without completely replacing production infrastructure. CCUS technologies capture carbon dioxide emissions from steel mill exhaust gases, either storing them permanently underground or utilizing them in industrial processes such as concrete production or chemical manufacturing.

Several CCUS projects are underway at steel plants in Europe and Asia, with varying levels of commercial maturity. While the technology is promising, challenges remain in terms of cost, scalability, and the infrastructure needed for carbon dioxide transport and storage. Nevertheless, CCUS is expected to play a meaningful role in the steel industry's transition to a low-carbon future, particularly for regions with limited access to renewable energy or recycled steel scrap.rap.

Designing for Low Embodied Carbon

Beyond sourcing lower-carbon steel, structural engineers and fabricators can reduce the embodied carbon of steel buildings through smart design strategies. Material efficiency is the most impactful approach, optimizing structural member sizes and connection designs to minimize the total quantity of steel required. Advanced structural analysis software enables engineers to identify and eliminate over-design, ensuring that every kilogram of steel serves a necessary structural function.

Jidian Construction Materials Co., Ltd. employs these design optimization strategies across its projects, using finite element analysis and parametric design tools to create efficient structural configurations. The company's engineering team also designs connections for fabrication efficiency, minimizing waste and reducing the energy consumed in welding and cutting operations. These approaches complement the use of lower-carbon steel to achieve meaningful reductions in overall building embodied carbon.bon.

Circular Economy and Steel Recycling

The circular economy is a fundamental aspect of sustainable steel construction. Steel is the most recycled material in the world, with a global recycling rate exceeding 90% for structural steel from demolished buildings. Unlike many other materials, steel can be recycled indefinitely without loss of mechanical properties, making it an ideal material for circular construction models.

Jidian Construction Materials Co., Ltd. supports circular economy principles by designing steel structures for disassembly, using bolted connections wherever possible and providing material passports that document steel grades and properties for future recovery. The company also recycles its own fabrication scrap, achieving a material utilization rate exceeding 92%. These practices reduce demand for virgin steel and minimize construction waste sent to landfills.

Green Building Certification and Steel

Green building certification programs are playing an increasingly important role in driving demand for low-carbon steel. LEED version 4.1 and the upcoming LEED v5 award credits for building life cycle assessment, environmental product declarations, and material ingredient reporting. BREEAM, the leading certification system in Europe, similarly rewards the use of lower-impact materials and design for disassembly.

Jidian Construction Materials Co., Ltd. actively supports clients pursuing green building certification, providing the documentation and technical guidance needed to earn material and resource credits. The company's experience spans projects certified under LEED, BREEAM, Green Mark, Estidama, and other regional rating systems across 50 countries, giving it unique expertise in navigating the sustainability requirements of different markets.ets.

The Business Case for Green Steel

While green steel currently commands a premium over conventional steel, the business case for adoption is strengthening. Increasingly, large corporations and institutional investors are committing to science-based emissions reduction targets, creating demand for low-carbon building materials. Carbon pricing mechanisms, such as the European Union's Carbon Border Adjustment Mechanism (CBAM), are beginning to internalize the cost of carbon emissions in material prices, narrowing the cost gap between conventional and green steel.eel.

For building owners and developers, specifying low-carbon steel can enhance asset value, attract environmentally conscious tenants, and reduce regulatory compliance risks. As green steel production scales and costs decline, it is expected to become the standard choice for sustainable construction projects. Jidian Construction Materials Co., Ltd. is committed to leading this transition and providing clients with steel structure solutions that meet the highest standards of environmental performance. Contact us at [email protected] or +86-8698336658.