... of Bird's Nest 4the thickenes:8-700mm St37-2 high performance bridge steel plate:1 Main application:Riveting and welding ... controlled rolling,normalizing,annealing,tempering,thermal refining,normalizing&tempering,etc.3 The detailed specification:Bridge steel palteSt37-2BrandWU GANGThe Specification3000mm- ... ,Gemany and other developed countries and regions. St37-2 high performance bridge steel plate