... # ( Japan, Europe standard ) Material: Q235, Q345 2. hot rolled channel steelSize: 5#-40# ( Japan, Europe standard ) Material: Q235, Q345 ... hot rolled flat bar, chord plate, galvanized flat bar Size: 12mm-300mm Material: Q235, Q345, 60SiMn, 65Mn 6. ledge steel Specification: D15, ... I-beam Specification: 9#, 10#, 11# 8. U-blacket steel Specification: 25U, 29U, 36U Material: 20MnK 9. hot rolled square ...