... Q345B, SS400, A992Gr50, S235JRG2, S235JR, S275JR and s355jr steel angle1.equal angle, unequal angle2.Stabdard: GB/T 9787, ... transmisson towers, lifting or transporting machines, shipping, industrial boilers- Framework of all kinds of construction and engineering- Construction joist- ... so on5.Descriptions- Definition: Angle steel is a kind of strip steel bearing the section with two orthogonal sides ...