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Carbon Steel Square Tube 20x20-200x200mm Q235B Q355B Square Pipe for Construction

Our carbon steel square tubes, available in sizes ranging from 20×20mm to 200×200mm, are engineered with premium Q235B and Q355B steel grades, ideal for diverse construction projects. Featuring high structural strength, excellent weldability and superior load-bearing capacity, these square pipes ensure stable performance in building frames, supports, scaffolding and infrastructure works. Precision-manufactured with smooth surfaces and strict dimensional accuracy, they meet industry standards and offer reliable durability for both residential and commercial construction applications.

  • Standard ASTM/ GB/ JIS/ EN Standard
  • Diameter 20x10mm-400x600mm
  • Thickness 0.8-12mm
  • Length 1-12m, according to customers 'requirements, stock is 6m

Parameter of Carbon Square And Rectangular Tubes

Outer Diameter

20*10-400*600mm

Wall thickness

0.8-12mm

Length

1-12m,according to customers' requirements,stock is 6m

Material

Q195,Q215,Q235,Q345,Q195-Q235

Standard

ASTM A500,GBT 6728,GB T 3094

Packing

(1)Big OD:in bulk
(2)Small OD:packed by steel strips into bundles

(3)According to the requirement of the customers.

Zinc Coating

Pre -: 60-150g/m2

Hot Dip Galvanzied:>200g/m2

Certificate

ISO 9001-2000

Technique

Welded/ERW/Cold drawn

Hollow Section--GBT 6728/ASTM A500

Size(mm)

Thickness(mm)

Size(mm)

Thickness(mm)

10*10

0.6-1.0

20*10

0.6-1.0

12*12

0.6-1.0

25*12

0.6-1.0

16*16

0.6-1.2

38*19

0.6-1.5

19*19

0.6-1.5

50*25

0.6-1.5

20*20

0.6-1.5

50*30

1.0-3.0

30*30

1.0-2.75

75*50

1.5-4.0

32*32

1.0-3.0

80*40

1.5-4.0

38*38

1.0-3.0

100*50

2.0-6.0

40*40

1.0-3.5

100*60

2.0-6.0

50*50

1.0-5.0

100*75

2.0-6.0

60*60

1.0-6.0

120*60

3.0-6.0

63.5*63.5

1.0-6.0

120*80

3.0-6.0

70*70

1.5-6.0

125*50

3.0-6.0

75*75

1.5-6.0

125*75

3.0-6.0

80*80

2.0-6.0

150*50

3.0-6.0

90*90

2.0-6.0

150*75

3.0-6.0

100*100

2.3-6.0

150*100

4.0-12

120*120

4.0-6.0

160*80

4.0-6.0

125*125

4.0-6.0

175*100

4.0-12

150*150

4.0-8.0

200*100

4.0-12

200*200

6.0-12

200*150

4.0-12

250*250

6.0-12

250*150

5.0-12

300*300

6.0-12

300*200

5.0-12

400*400

6.0-12

400*200

5.0-12

Features of Carbon Steel Square Tubes

  1. High Strength & Superior Load-Bearing Capacity Carbon steel inherently offers impressive tensile strength. When fabricated into square or rectangular profiles, their structural configuration enables efficient distribution and transfer of external forces, resisting deformation and damage effectively. This makes them a reliable support solution for building frameworks and mechanical structures alike.
  2. Versatile Specifications & Customizable Sizing Available in a wide array of standard specifications, these pipes also allow flexible customization of side lengths and wall thicknesses. Such adaptability perfectly caters to the diverse design and application needs of different engineering projects.
  3. Excellent Processability These carbon steel square and rectangular pipes feature outstanding machinability, facilitating seamless cutting, welding, bending and other fabrication processes to meet various on-site construction requirements.
  4. Cost-Effective Advantages In contrast to special alloy pipes, carbon steel square and rectangular pipes enjoy lower raw material costs. Coupled with mature production techniques and high manufacturing efficiency, they effectively cut down the overall project expenditure.
  5. Eco-Friendly Recyclability Boasting excellent recyclability, these carbon steel pipes can be easily retrieved and reprocessed once they reach the end of their service life or are removed during engineering renovations. After remelting and refining, they can be transformed into new steel products, fully aligning with the principles of sustainable development.

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