Seamless square tube supplier in Jiangsu seamless square tube distributor seamless pipe, is four corners of the steel pipe, cold drawn seamless extruded from the rectangular steel pipe, seamless pipe and welded square tube square difference in nature . Steel hollow section in large quantities as piped fluid. Note: 1, large supply for your special wall thickness, materials seamless steel tubes, cold drawn precision tubes and a variety of thermal expansion. Square tube Model: Q345A: C≤0.20, Mn ≤1.70, Si≤0.50, P≤0.035, S≤0.035; Q345B: C≤0.20, Mn ≤1.70, Si≤0.50, P≤0.035, S≤0.035; Q345C: C≤0.20, Mn ≤1.70, Si≤0.50, P≤0.030, S≤0.030, Al≥0.015; Q345D: C≤0.18, Mn ≤1.70, Si≤0.50, P≤0.030, S≤0.025, Al≥0.015; Q345E: C≤0.18, Mn ≤1.70, Si≤0.50, P≤0.025, S≤0.020, Al≥0.015; Q345A, B, C, D, E inclusive Nb≤0.07, V≤0.15, Ti≤0.20, Cr ≤0.30, N≤0.012, Mo≤0.10. 20 #, Q235B factory production of precision seamless bright bright color system looks smooth, uniform thickness, no oxide layer, high precision. Seamless pipe can be divided into round holes, spline type, plum-type, and other widely used in automobiles, motorcycles, hydraulic, petrochemical, shipbuilding, aerospace, bearings, pneumatic components, fuel tanks, boiler equipment, medical equipment, fitness equipment, etc. . Steel Category: 20 # high precision seamless tube, 45 # precision steel, GCr15 bearing steel, 20Cr precision steel pipe, 16Mn seamless steel pipe, 40Cr precision oil casing pipe and so on. Non-standard precision tubes can be customized according to user needs. He Pipe Co., Ltd. Liaocheng name ||| seamless square tube seamless square tube supplier in Jiangsu dealers