Tube & Structural Tube
Round, square and rectangular tube in steel, aluminum and stainless.
Also searched as: square tuberound tubedom tubestructural tubebox section
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ABS Plastic Square Tube
Color: WhiteLength: 250 mmSide 1: 3-6 mmSide 2: 3-6 mm
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Aluminium Square Tube Box Section T6 100mm x 100mm x 3mm
Outer Dimensions: 100mm x 100mmShape: SquareWall Thickness: 3mm
from $23.54eBay $23.54 -
DOM Mild Steel Round Tube
Length: 12 inOutside Diameter: 1 inShape: RoundWall Thickness: 0.120 in
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DOM Steel Round Tube
Length: 24 inOutside Diameter: 1.25 inShape: RoundWall Thickness: 0.065 in
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DOM Steel Round Tube
Length: 12 inOutside Diameter: 2.5 inShape: RoundWall Thickness: 0.065 in
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DOM Steel Round Tube
Inside Diameter: 0.435 inLength: 6 ftOutside Diameter: 0.625 inShape: RoundWall Thickness: 0.095 in
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DOM Steel Round Tube
Length: 5 inOutside Diameter: 3 inShape: RoundWall Thickness: 0.5 in
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DOM Steel Round Tube
Inside Diameter: 0.745 inLength: 3 ftOutside Diameter: 0.875 inShape: RoundWall Thickness: 0.065 in
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DOM Steel Tube
Length: 12 inOutside Diameter: 2.125 inWall Thickness: 0.25 in
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Mild Steel Rectangular Hollow Section 50 x 25 x 2
Outer Dimensions: 50mm x 25mmShape: RectangularWall Thickness: 2mm
from $79.61eBay $79.61 -
from $12.38eBay $12.38 -
Mild Steel Square Hollow Section 50 x 50 x 5.0
Outer Dimensions: 50mm x 50mmShape: SquareWall Thickness: 5.0mm
from $180.52eBay $180.52 -
from $5.78eBay $5.78 -
Steel Square Tube
Side 1: 8 inchSide 2: 8 inchWall Thickness: 0.5 inch
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Steel Square Tube
Length: 36 inchSide 1: 1 inchSide 2: 1 inchWall Thickness: 0.120 inch
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Steel Square Tube
Length: 40 inchSide 1: 2 inchSide 2: 2 inchWall Thickness: 0.250 inch
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Steel Square Tube
Length: 12 inchSide: 1.50 inchWall Thickness: 0.083 inch
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Steel Square Tube
Length: 6 inchSide 1: 2 inchSide 2: 2 inchWall Thickness: 0.120 inch
About tube & structural tube
Tube and structural tube are hollow profiles utilized in construction, mechanical assemblies, and architectural applications for their strength-to-weight ratio and rigidity. This category encompasses round, square, and rectangular cross-sections, primarily manufactured from steel (including mild steel, DOM, and various alloys), aluminum (e.g., 6061-T6, 6063-T5), and stainless steel (e.g., 304, 316). Key selection parameters include outside diameter (OD) or side dimensions, wall thickness (gauge), and overall length. Steel tubing often conforms to standards such as ASTM A500 for cold-formed welded and seamless carbon steel structural tubing, or ASTM A513 for electric-resistance-welded carbon and alloy steel mechanical tubing. Aluminum tubing frequently adheres to ASTM B221 or B429. Surface finishes vary from mill finish to galvanized, painted, or anodized, depending on corrosion resistance and aesthetic requirements. DOM (Drawn Over Mandrel) tubing is characterized by its superior concentricity, dimensional accuracy, and smooth internal and external surfaces, making it suitable for hydraulic cylinders and precision shafts. Structural tube, often referred to as box section, is designed for load-bearing applications where high strength and torsional rigidity are critical.
How to choose
Selecting the appropriate tube begins with defining the application's structural requirements. First, determine the necessary cross-sectional shape: round for fluid transfer or aesthetics, square/rectangular for structural framing and torsional rigidity. Second, specify the material based on strength, weight, and environmental exposure; steel offers high strength, aluminum provides a lighter alternative, and stainless steel ensures corrosion resistance. Third, calculate the required outer dimensions (OD for round, side length for square/rectangular) and wall thickness to meet load-bearing and deflection criteria. Thicker walls increase strength but also weight and cost. Finally, consider the manufacturing process (e.g., seamless for pressure, DOM for precision) and any required surface finishes for environmental protection or appearance.