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Curtain wall refined steel emerges as a core solution for high-end architectural materials.
2026-05-25
With the full implementation of the new 2026 General Code for Fire‑Resistant Design of Building Curtain Walls,准入 standards for curtain walls in large public buildings—such as ultra‑tall office towers, transportation hubs, convention and exhibition centers, and Grade‑III hospitals—have been significantly tightened. The revised regulations explicitly stipulate that for exterior curtain walls of buildings taller than 100 meters, the fire‑resistance rating of the primary structural members of the mullion system must be no less than 1.5 hours. Traditional aluminum alloy curtain walls, with a melting point of only 660°C, readily soften and deform at high temperatures, failing to meet the stringent requirements for fire‑safe evacuation and façade collapse resistance in ultra‑tall structures, thereby further restricting their use in high‑end public‑building applications.
Amid this industry transformation, refined steel for curtain walls has emerged as the premier material for high-end building envelope systems, thanks to its triple core advantages: fire resistance, dimensional accuracy, and low carbon footprint. In terms of fire performance, refined steel is made from low‑alloy carbon steel, achieving a fire‑resistance rating of over two hours without the need for additional heavy fire‑proof cladding, thus meeting the latest fire‑safety regulations. For structural precision, an integrated cold‑forming process keeps dimensional tolerances within ±0.1 mm, enabling seamless integration with curved and streamlined façades while enhancing architectural aesthetics. From a sustainability standpoint, refined steel is 100% recyclable and can be reprocessed, reducing lifecycle carbon emissions by 42% compared with aluminum alloy produced via electrolytic smelting, making it fully aligned with China’s zero‑carbon and green‑building certification standards.
At present, landmark projects across the Central Plains and the Yangtze River Delta have begun to replace their curtain‑wall primary materials on a large scale. The industry has officially moved beyond the era of aluminum alloy as the sole dominant material, embarking on a comprehensive transformation and upgrade toward an integrated approach that prioritizes safety as a foundational principle, enhances façade aesthetics, and aligns with low‑carbon and dual‑carbon policies.
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