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Steel Square Tubing 

Steel tubing does the heavy lifting for America’s infrastructure, commercial buildings, and industrial applications. Triple-S Steel® is a leading supplier of steel square tubing in over 50 national and international locations. We stock structural steel grades ASTM A513 and ASTM A500 Grade B, along with galvanized options. 

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Square Tube

Square Tubing

Welded and Seamless Structural Steel Square Tube

Welded square steel tubing is more common, cost-effective, and versatile, allowing for a greater range of sizing. Seamless tubing is mainly used for architectural applications where the metal surface needs to be visible and attention-grabbing.

Also Available in The Following Shapes:

Industries and Applications for Steel Square Tubing

Square steel tubing is generally used for structural applications:

  • Oil, gas, and petrochemical: Support structures for equipment and processing tanks
  • General construction: Pillars, beams, architectural accents, and scaffolding
  • Infrastructure: Bridge and tower components
  • Commercial and industrial environments: Handrails, walkways, lifts, safety systems, and signage
  • Automotive manufacturing: Automobile frames, suspension systems, truck beds, and trailer parts
  • Consumer goods manufacturing: Frames for tables, chairs, shelving, appliances, and decorative pieces

Other applications include parts for heavy machinery and agricultural equipment, from loaders to tractors. High-strength low-alloy steel is ideal for these heavy-duty applications, offering a minimum tensile strength of 65 ksi.  

Advantages of Square Steel Tube

Square tubing provides outstanding strength, downward compression resistance, hardness, rigidity, and vibration resistance (though less resistance to torsion). These qualities make structural steel square tube a natural choice for commercial and industrial building projects. Galvanized steel tubing offers enhanced corrosion resistance for exposed applications.

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Steel Square Tube Products 

Please include your desired length in the comments section when reviewing your cart.
namesize descriptiongradeweightAdd To Quote Cart
ALUMINUM SQUARE TUBING 3/4 X .065 60610.205
ALUMINUM SQUARE TUBING 1-3/4 X .125 60610.9458
ALUMINUM SQUARE TUBING 2 X .125 60611.103
ALUMINUM SQUARE TUBING 2 X .120 60611.126
ALUMINUM SQUARE TUBING 1-1/2 X .250 60611.47
ALUMINUM SQUARE TUBING 2 X .188 60611.638
ALUMINUM SQUARE TUBING 2 X .250 60612.058
ALUMINUM SQUARE TUBING 4 X .125 60612.31
ALUMINUM SQUARE TUBING 3 X .250 60613.234
ALUMINUM SQUARE TUBING 3-1/2 X .250 60613.8165
ALUMINUM SQUARE TUBING 4 X .250 60614.51
ALUMINUM SQUARE TUBING 5 X .250 60615.5719
ALUMINUM SQUARE TUBING 6 X .250 60616.987
ALUMINUM SQUARE TUBING 6 X .500 606112.93
ALUMINUM SQUARE TUBING 1/2 X .062 60630.131
ALUMINUM SQUARE TUBING 5/8 X .062 60630.138
ALUMINUM SQUARE TUBING 3/4 X .065 60630.201
ALUMINUM SQUARE TUBING 3/4 X .065 RADIUS 60630.201
ALUMINUM SQUARE TUBING 1 X .062 60630.238
ALUMINUM SQUARE TUBING 1 X .065 60630.274
ALUMINUM SQUARE TUBING 1 X .065 RADIUS 60630.274
ALUMINUM SQUARE TUBING 1-1/4 X .065 60630.345
ALUMINUM SQUARE TUBING 1-1/4 X .062 60630.354
ALUMINUM SQUARE TUBING 3/4 X .125 60630.368
ALUMINUM SQUARE TUBING 1 X .093 60630.392
ALUMINUM SQUARE TUBING 1 X .093 RADIUS 60630.392
ALUMINUM SQUARE TUBING 1-1/2 X .065 60630.428
ALUMINUM SQUARE TUBING 1 X .125 60630.516
ALUMINUM SQUARE TUBING 1-1/2 X .093 60630.632
ALUMINUM SQUARE TUBING 1-1/4 X .125 60630.662
ALUMINUM SQUARE TUBING 1-1/2 X .125 60630.809
ALUMINUM SQUARE TUBING 1-3/4 X .125 60630.9458
ALUMINUM SQUARE TUBING 2 X .062 60631
ALUMINUM SQUARE TUBING 2 X .125 60631.103
ALUMINUM SQUARE TUBING 1-1/2 X .188 60631.184
ALUMINUM SQUARE TUBING 2-1/2 X .125 60631.397
ALUMINUM SQUARE TUBING 2 X .188 60631.638
ALUMINUM SQUARE TUBING 3 X .125 60631.691
ALUMINUM SQUARE TUBING 2 X .250 60632.058
ALUMINUM SQUARE TUBING 4 X .120 60632.279
ALUMINUM SQUARE TUBING 4 X .125 60632.279
ALUMINUM SQUARE TUBING 2-1/2 X .250 60632.636
ALUMINUM SQUARE TUBING 3 X .250 60633.234
ALUMINUM SQUARE TUBING 6 X .125 60633.525
ALUMINUM SQUARE TUBING 4 X .250 60634.51

A Complete Range of Square Tubing

At Triple-S Steel®, we maintain a large stock of steel square tubing for light-, medium-, and heavy-duty applications. Request a quote to see detailed specifications.

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For more than 60 years, we've stayed committed to fair trade and long-term thinking, providing great products and unwavering service. Our team's flexibility and entrepreneurial spirit ensure tailored solutions that create opportunities for your success within our Triple-S Steel® family.

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