... - SS490Standard:DIN, JIS, EN, GB Detailed Description Detailed introduction to I-beam: I beam,.also called girder,is one kind ... been delivering high quality products with very competitive prices to the world market. Steel grade: ST37-2,Q 235B,SS400,etc ... in Beijing,Qinhuangdao, and Wuhan.The product widely applied to shipbuilding industry, architecture industry, petroleum and hemistry industry, ...