Shanghai low-alloy square tube, hot-rolled iron ho q345 pipe, rectangular pipe 1.5.2.2.1.1.6.6.5.1.1 Shanghai Industrial Co., Ltd. specializes in the supply of iron ho Q345B square tube, 16Mn square pipe, large diameter thick-walled tube, Seamless square and rectangular tube, galvanized square steel pipe and other products. Low-alloy square tube 100 * 100 * (4-10mm) low-alloy square tube 150 * 150 * (5-20mm) low-alloy square tube 250 * 250 * (5-25mm) low-alloy square tube 180 * 180 * (5- 18mm) low-alloy square tube 280 * 280 * (5-25mm) low-alloy square tube 356 * 356 * (5-25mm) low-alloy square tube 200 * 200 * (5-20mm) low-alloy square tube 300 * 300 * ( 5-25mm) low-alloy square tube 350 * 350 * (5-25mm) low-alloy square tube 220 * 220 * (5-20mm) low-alloy square tube 400 * 400 * (5-25mm) low-alloy square tube 500 * 500 * (5-25mm) low-alloy square tube 500 * 300 * (5-25mm) low-alloy square tube 100 * 180 * (5-14mm) low-alloy square tube 250 * 150 * (5-20mm) low-alloy square tube 300 * 200 * (5-25mm) low-alloy square tube 300 * 100 * (5-22mm) low-alloy square tube 350 * 200 * (5-25mm) low-alloy square tube 300 * 150 * (5-22mm) low-alloy square tube 350 * 250 * (5-25mm) low-alloy square tube 350 * 300 * (5-25mm) low-alloy square tube 300 * 200 * (5-25mm) low-alloy square tube 400 * 250 * (5-25mm) Low alloy square tube 400 * 600 * (5-25mm) low-alloy square tube 400 * 200 * (5 * 25mm) low-alloy square tube 450 * 250 * (5-25mm) low-alloy square tube 500 * 200 * (5-25mm )