Application of high strength steels in civil construction in seismic areas

In recent years, high strength and good weldability of steels have been required for building structures. Hyundai Steel Company has developed a series of construction steels ranging from 550 to 800 MPa tensile strength class, with 450 to 650 MPa yield strength. A microstructure of low-C bainite was obtained by using thermomechanical controlled rolling with accelerated cooling. These steels achieved the required mechanical properties (high strength, low yield/UTS ratio) and demonstrated satisfactory weldability up to 100 mm thickness. In 2012, these steels were successfully used in the construction of the “Federation of Korean Industries” building. (AU) Copyright © 2015 Companhia Brasileira de Metalurgia e Mineração (CBMM) All rights reserved.