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Carbon steel square tube
Carbon steel square tube is a hollow-section steel product with equal width and height, produced by welding or seamless manufacturing methods. It offers high strength, excellent load-bearing capacity, and a clean, angular profile, making it ideal for structural and architectural applications. Square tubes are widely used in construction, mechanical manufacturing, furniture production, and various fabrication projects due to their versatility, cost-effectiveness, and ease of processing.
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Product Parameters


Technical Specifications


  • Material Grade: ASTM A500, ASTM A513, EN 10219, JIS G3466, A36, S235, S355, 4130, 4140, 4340, A106 Gr.A/B, A333, A500, St52, AH36, 1020, 1018, 1010, S275JR, A53, 1045, SS400, etc.

  • Manufacturing Process: ERW, seamless, hot rolled, cold formed

  • Size Range:

    • Outside Dimensions: 10×10mm – 500×500mm

    • Wall Thickness: 0.8mm – 20mm

    • Length: 6m, 12m, or customized

  • Surface Treatment: Black painted, galvanized, powder-coated, anti-rust oil

  • End Finish: Plain end, beveled end, deburred

  • Tolerances: As per ASTM/EN standards for OD, thickness, and length


Mechanical & Performance Properties


  • Tensile Strength: 400–550 MPa

  • Yield Strength: ≥ 245 MPa

  • Elongation: 20%–25%

  • Load-Bearing: Excellent for compression and bending applications

  • Surface Quality: Smooth, uniform finish with clean edges

  • Corrosion Resistance: Improved with galvanization or coating

  • Dimensional Accuracy: High precision in cold-formed tubes


Production Process



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Product Real Shot


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Packaging and Shipping


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Applications & Advantages


Applications:

  1. Building frameworks, supports, and columns

  2. Fencing, railings, and gates

  3. Furniture manufacturing

  4. Mechanical parts and fabrication projects

  5. Agricultural machinery frames

Advantages:

  • Uniform shape for aesthetic and structural consistency

  • Easy to cut, weld, and drill

  • Strong in both compression and torsion

  • Cost-effective with multiple surface finishes available


FAQ


Q1: What product information must I provide before making a purchase?
A: Please provide the grade, width, thickness, surface treatment requirements, and the quantities you need.

Q2: What about product pricing information?
A: Prices may vary due to fluctuations in raw material costs.

Q3: Is it possible to send samples?
A: Yes, we offer free samples with express shipping worldwide.

Q4: Do you offer a service for customized products?
A: Yes, we can supply according to your specific requirements.

Q5: Can I visit you in person?
A: Customers from all over the world are welcome to meet with us.

Q6: Can you assist me in importing steel products for the first time?
A: Yes, we can provide support through our experienced shipping agents.


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