Cold-formed large-sized thick-walled rectangular pipe B490RNQ hot rolled steel and its mechanical properties at room temperature to fully meet and exceed the requirements of national standard Q345B, Beijing square tube forming properties comparable or superior to Q345B, the yield ratio to meet national building industry standards on seismic requirements. While its temperature is superior to the same level of Q345B, 600 yield strength B490RNQ remained at 310MPa, much higher than the two-thirds of the yield strength at room temperature, and the process Q345B 500 above the yield strength of the wall thickness of 8mm is less than 2 / 3 room temperature yield strength. Mastery of Tianjin Steel Trade Co., Ltd. is in production, sales, logistics in one large square tube manufacturers. Square tube and rectangular tube produced by our company with a full-size specifications: 600 * 20 * 20 --- 600 square tube, 20 * 30 --- 400 * 800 rectangular tube, galvanized pipe, a thickness of 1.5mm --- 32mm, stainless steel pipe, specifications of more than 2800 kinds; material for the Q195, Q215, Q235, Q275, Q345,20 #, 45 #, square tube, galvanized pipe, seamless pipe, large diameter thick square tube, square and rectangular tubes, etc., and can produce diamond, triangular, pentagonal, hexagonal, fan and other special size, are also available according to customer drawings, dimensions tailored. The production line for the leading international and domestic initiative of the wave roll extrusion unit, which rejected the original small workshop mode of production speed slow cold drawn square and rectangular tube, no guarantee of quality, twist, bend crack, uneven thickness and is now widely volume applications of cold-formed unit, low accuracy, specifications single, small caliber, thin (15.75mm) and other defects. The unit is forming, straightening one of the crew, the entire computer monitor, without manual pull hard pull, fully automated unit can guarantee square tube rectangular tube of a variety of mechanical and physical properties. Each production line output exceeds 20 tons per hour, the total output of the entire year after up to 15 tons. Beijing square tube, around the steel joint, the pipe factory provided by the Tianjin Steel Trade Co., Ltd. Mastery. Beijing square tube, around the steel joint, square steel tube manufacturers in Tianjin Tongda Trade Co., Ltd. (www.tjtdgl.com) (www.tdglgt.com) this year introduced a new upgrade, the above picture is for reference only, please dial this page Phone or pictures on obtain the latest information, contact: Yanjing Li.