Q345B Seamless Square Tube

Our company specializes in the production and sales of square tubes, rectangular tubes, welded tubes, and special-shaped steel pipes. Our product range includes high-strength material series, low-temperature resistance series, large-diameter thick-walled series, European, American, and Japanese standard series, cold-rolled precision bright series, and hot-dipped galvanized series, etc.

Product广泛应用fields: Architectural steel structures (large venues, convention centers, stations, gymnasiums, residential renovation, etc.), railway bridges, vehicle manufacturing, shipbuilding, traffic facilities, machinery and equipment, wind power equipment, offshore engineering, solar photovoltaic supports, multi-level parking garages, decoration and renovation, fitness equipment, and more.

Square and Welded Pipe Materials and Standards: Q235B, Q345B, Q345C, Q345D, Q345E, Q355B, Q355C, Q355D, Q355E, Q355JR, Q355J2, Q355JOH, Q355J2H, Q390B/C/D/E, Q420B/C/D/E, Q460B/C/D/E, Q500 Series, Q510 Series, Q610 Series, Q690 Series, Q700 Series, QSTE700TM, SPCC, SECC, SPHC, SS400, 25Mn, 65Mn, etc., in accordance with standards: GB/T6725-2008, GB/T6726-2008, GB/T6727-2008, GB/T6728-2008, GB/T3091-2008, GB/T3094-2000, GLSG3445, GLSG3446, EN10210, EN10219, etc.

Square tube specifications: 20*20 -- 600*600 (1mm -- 35mm)

Rectangular tube specifications: 10*20 to 600*800 (1mm to 35mm)

Welded pipe specifications: 20-800*(1mm-40mm)

Specialty Steel Pipes: Available for various custom molds, including P-type, D-type, elliptical, and other shapes.

Standard sizes of mechanical and construction square tubes: 50*50*5, 60*60*6, 70*70*6, 76*76*6, 80*80*8, 86*86*8, 90*90*8, 98*98*10, 108*108*10, 118*118*10, 120*120*12, 135*135*12, 200*200*12, 300*300*14, 400*400*16, 500*500*18, 600*600*20