Seamless square tube supplier of seamless pipe distributors _ seamless square tube, square corners are steel, cold drawn seamless steel tubes extruded from rectangular steel pipe, seamless square tube and welded square tube is essentially the difference . Steel hollow section, a lot of fluids used for pipeline transportation. 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 inner hole can be divided into round, 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 and other industries . Pipe Category: 20 # high precision seamless, precision steel 45 #, GCr15 bearing steel, 20Cr precision steel, 16Mn seamless steel, 40Cr steel and other precision tubing and casing. Non-standard precision tubes can be customized according to user needs.