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Q275/S275JR/SM490 Carbon Steel Rectangular Pipe
Carbon steel square tubes, that is, square and rectangular cold-formed hollow sections, are commonly used materials in construction and machinery manufacturing. It can be divided into plain carbon steel and low alloy steel according to its material. It has the advantages of high strength, good corrosion resistance, low cost and easy processing. Carbon steel square tubes are widely used in engineering construction, machinery manufacturing, petrochemical industry and other fields, and can meet the needs of use in various complex environments.
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◉ Key Attributes

Product NameQ275/S275JR/SM490 Carbon Steel Rectangular Pipe
TechniqueSeamless tube,ERW tube,LASW tube
Wall Thickness0.5MM~300MM
Width10MM~1200MM
LengthLength:Single random length/Double random length
Surface Treatment1. Galvanized
2. PVC,Black and color painting
3. Transparent oil,anti-rust oil
4. According to clients requirement
StandardAPI 5L, ASTM A53-2007, ASTM A671-2006, ASTM A252-1998, ASTM A450-1996, ASME B36.10M-2004, ASTM A523-1996, BS 1387, BS EN10296, BS 6323, BS 6363, BS EN10219, GB/T 3091-2001, GB/T 13793-1992, GB/T9711
Application1. Fence, greenhouse, door pipe,greenhouse
2. Low pressure liquid, water, gas, oil, line pipe
3. For both indoor and outdoor the building construction
4. Widely used in scaffolding construction which is much cheaper and convenient
EdgePlain end/Beveled,protected by plastic caps on both ends, cut quare,grooved,threaded and coupling,etc.
Material10#, 20#, 45#, 16Mn, A53(A,B), Q235, Q345, Q195, Q215, St37, St42, St37-2, St35.4, St52.4, ST35
PackingBundle, or with all kinds of colors PVC or as your requirements
Container Dimension20ftGP:5898mm(Length)x2352mm(Width)x2393mm(High)   24-26CBM
40ftGP:12032mm(Length)x2352mm(Width)x2393mm(High)  54CBM
40ftHC:12032mm(Length)x2352mm(Width)x2698mm(High)    68CBM


◉ Product Details


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Product Introduction


Carbon steel square tubing is a durable material made of welded structural grade carbon that is used for construction and structural applications. It has a uniform shape and size, is recyclable, and has improved torsional and uniform strength. Carbon steel square tubing is often used in fabrication and structural applications because of its low carbon content, good mechanical properties, and high quality weldability. It is also easily drilled, welded, and bolted. 


About Us


Zhongxi Metal is a professional manufacturer engaged in the research, development, production, sale and service.,  is committed to providing one-stop steel procurement services for global client. 


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Advantages of Carbon Steel Square Tubing


Carbon steel square tubing is a durable material that is often used in construction and structural applications. It is made from welded carbon steel and has a uniform size and shape. Carbon steel square tubing has the following advantages:


  • Strength: Square tubing is made from high-quality steel, which is known for its strength and resilience. The square shape of the tube also makes it stronger than other shapes, as it distributes weight evenly and resists bending.

  • Load-bearing capacity: Carbon steel square pipe has a more enhanced load-bearing capacity than round steel pipe.

  • Uniformity: Square tubing provides regularity in size, shape, and tolerance.

  • Resistance: Square tubing is fire resistant and does not twist, split, or shrink.

  • Low cost: Square tubing requires fewer processes to form as compared to other types of mechanical tubing. 


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Quality Control


We have our own Physical & Chemical Testing Center Lab to guarantee our product quality. Our test items & instrument fully meet international standards.


Applications of Carbon Steel Square Tubing


Carbon steel square tubing has many uses, including in construction, manufacturing, and general fabrication. It's also used in the automotive, solar, appliance, and agriculture industries. Some applications include:


  • Construction: Buildings, towers, sign support, and support structure for bridges.

  • Manufacturing: Brackets and bases for solar panels, construction equipment, trucks, trailers, railcar frames, and bases.

  • General fabrication: Trailers, structural fabrications, and general machinery.



Carbon steel square tubing is available in a variety of sizes, including specific, hard-to-find, and custom sizes. It has a low carbon content, relatively good mechanical properties, and high quality weldability. Cold formed carbon steel square tubing has a higher yield and tensile strength than hot formed steel, meaning it can tolerate high temperatures, high pressures, and other damaging elements. 


Square steel tubing is typically higher in strength than that of round or rectangular tubing of the same material and dimensions. This is because the square shape provides more structural support and reduces the risk of buckling. 


Contact Us


As a leading company, Zhongxi Metal is known for our excellent product quality and professional services, providing our customers with a reliable partner. We have a global sales network that can meet the needs of customers in different countries and regions.If you need more information about us or have any other needs, please feel free to contact us. We look forward to working with you to create a better future.


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