What type of steel is used for the UBB core plate?
Nippon Steel Corporation uses several different grades of steel for the core plate, depending on the designer’s objectives for brace yield force and stiffness. These steels all have very good toughness and elongation properties. The steels most commonly used for US projects are ASTM A36 steel and Japanese Industrial Standard SN400B (yield stress approximately similar to A36, but with lower and upper limits for yield and tensile stress).
