“…With the development of bridge design and the constructions of large-scale and long-span steel bridges [1][2][3][4][5], such as, three cross-sea bridges of Donghai Bridge, Hangzhou Bay Bridge and Qingdao Bay Bridge with world's longest span built in China [6], the high performance bridge steels have been developed [4,7]. It is advantageous for applications of high performance bridge steels with higher strength, better plasticity, better low-temperature toughness, better weldability, better cold formability and better corrosion resistance to reduce weight structures, simplify structures [7], reduce cost and realize energy saving and emission reduction, etc.…”