EN 10305-4 E355, 1.0580, St52, St52.4, CFS 5, TU 52-b, Q345B, S355T, TU 526, FE 510, Precision Steel Tube, Power Steering, HPL Tube, EN 10305-4 Steel tubes for precision applications Part 4:
EN 10305-1 E355 Hydraulic Cylinder Pipe,Round Honed Steel Tube -