Hyundai Steel announced on the 12th that it has obtained the first Korean Industrial Standard (KS) certification in the country for its structural H-beam, "SHN355FR," which is designed to withstand both fire and earthquakes.
The certification was granted in accordance with the revised KS D 3866 standard (Hot-Rolled Structural Steel Shapes for Building Structures), updated in July 2024. Hyundai Steel's Incheon plant has become the first facility in Korea to receive KS certification for fire- and earthquake-resistant H-beams under the revised standard. SHN355FR is an H-beam with a yield strength of approximately 355 MPa (megapascals), featuring both the ability to withstand structural deformation during an earthquake and the performance to maintain strength in the event of a fire. It is designed to retain at least 67% of its room-temperature yield strength even when the steel temperature rises to 600 degrees Celsius.
When revising the KS D 3866 standard in 2024, the Korea Agency for Technology and Standards newly included fire- and earthquake-resistant structural shapes (SHN-FR) with a yield strength of 355–460 MPa into the national standard, in addition to existing earthquake-resistant shapes (SHN). Hyundai Steel received certification for its product performance as well as its manufacturing and quality management systems in line with this specification.
As buildings become taller and larger, the importance of structural steel capable of simultaneously withstanding fire and earthquakes is growing. In particular, applying steel that maintains its strength at high temperatures can enhance building safety while reducing the amount of fireproofing material used, thereby improving construction efficiency.
Hyundai Steel plans to gradually expand the range of strength and thickness for its fire- and earthquake-resistant steel materials, using this certification as a starting point. The company is also focusing on advancing its manufacturing technology to improve both performance and cost-effectiveness. Since developing SHN, the first hot-rolled H-beam for building structures in Korea, in 2005, Hyundai Steel has introduced various construction steel products, including high-strength earthquake-resistant rebar and SHN460. In 2017, the company launched its earthquake-resistant steel brand, "H CORE."
A Hyundai Steel official stated, "Through continuous research and development and quality enhancement, we will contribute to creating a safer architectural environment."
in INDUSTRY
