Japanese Research on Super-High-Strength Structural Steel [N12]

The Japanese industry recently introduced a new grade of structural steel designated HSA700. This steel has a specified minimum yield strength of 100 ksi (700 MPa) and minimum tensile strength of 113 ksi (780 MPa). Effort is ongoing to develop construction methods that take advantage of the new steel to achieve improved seismic performance, reduced carbon footprint, and reduced life-cycle cost. This session will outline the motivation that led to the development of HSA700 steel. Key properties and attractions of the new steel will be highlighted. A pioneering building design will be discussed to illustrate the new possibilities offered by HSA700 steel. A research program will be described whose goal is to develop bolted built-up columns composed of HSA700 plates that may be used in all bolted construction.

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