Shanghai shaped square and rectangular tube, galvanized square steel, low-alloy square tube Q345B 1.5.2.2.1.1.6.6.5.1.1 Shanghai Iron Horse Industry Co., Ltd. is a high-frequency supply pipe, rectangular tube, square tube products to sell 15 × 15-500 * 500mm, rectangular tube 10 × 20-600 * 400mm based. Business scope includes all kinds of pipe, rectangular pipe, square and rectangular tube, galvanized square tube, Q345 square tube, low-alloy square tube, seamless Rectangular pipe, large diameter square and rectangular tube, thick-walled Rectangular Pipe, high-frequency double Weld Rectangular pipe, pipe, seamless steel pipe and various specifications are as follows: square tube 80 * 80 * 4.0 * 80 * 80 square tube square tube 5.0 3.0 80 * 80 * 80 * 80 square tube square tube 80 * 6.0 * 80 * 8.0 * 80 * 80 square tube 10.0 square tube 90 * 90 * 6.0 square tube 90 * 90 * 8.0 square tube 90 * 90 * 10.0 square tube 100 * 100 * 3.0 square tube 100 * 100 * 4.0 square tube 100 * 100 * 5.0 square tube 100 * 100 * 8.0 Product performance: GB / T6725-2002, GB / T6728-2002 standards.