Q345B Square Pipe

The company specializes in the production and sales of square tubes, rectangular tubes, welded tubes, and special-shaped steel tubes. 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 Products: 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 various other fields.

Rectangular tube and welding 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., standards followed: 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: 20-800mm (1mm-40mm)

Specialty steel pipes: Available in various shapes, such as P-type, D-type, and elliptical.

Common specifications 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