Q345B Square Pipe

The company specializes in the production and sales of square tubes, rectangular tubes, welded tubes, and special-shaped steel pipes. Our products include 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.

Widespread application fields of our products include architectural steel structures (large venues, exhibition centers, stations, gymnasiums, residential renovation, etc.), railway bridges, vehicle manufacturing, shipbuilding, transportation facilities, machinery and equipment, wind power equipment, offshore engineering, solar photovoltaic supports, multi-level parking garages, decoration, and fitness equipment, among various industries.

Square tube and welded tube 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., compliance 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*20mm to 600*600mm (1mm to 35mm)

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

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

Specialty steel pipes: Capable of producing various shapes including P-shape, D-shape, elliptical, etc., through customized molds.

Standard sizes for 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