Price range: $26.00 through $131.01
3″ x 3″ x 3 gauge (.250″ wall) square steel tubing is manufactured from ASTM A500 steel, a cold-formed carbon steel specification designed for heavy-duty structural applications. This hollow structural section (HSS) features a large square profile with a thick wall, offering exceptional strength, rigidity, and load-bearing capacity. Typically produced in Grade B, it provides excellent weldability, dimensional precision, and durability for demanding construction and fabrication projects.
Applications:
3″ square steel tubing (3ga) is commonly used in:
• Heavy structural frames, supports, and columns
• Industrial machinery frames and equipment bases
• Gates, railings, and security structures requiring high strength
• Automotive and trailer chassis components
• Large-scale fabrication and construction projects
• Structural bracing and load-bearing assemblies
Advantages:
• Exceptional strength: Thick wall (.250″) supports heavy loads and resists deformation
• Durable construction: Designed for demanding structural and industrial applications
• Excellent weldability: Compatible with MIG, TIG, and stick welding
• Versatile fabrication: Can be cut, drilled, and modified for custom projects
• Consistent quality: Manufactured for precise dimensions and reliable performance
Summary:
The 3″ x 3″ x 3 gauge ASTM A500 square steel tube is a heavy-duty structural material ideal for high-strength frames, supports, and industrial fabrication. Its thick wall, combined with excellent weldability and durability, makes it perfect for load-bearing applications and demanding construction projects.
* Prices are subject to change without notice due to fluctuations in the metals market. | All “Value Length” and “Value Pack” item measurements are subject to standard mill tolerances. | Products may be manufactured several thousandths of an inch over or under the stated dimensions and still be within acceptable mill tolerances. All bar, tube, structural, pipe, sheet, plate, and similar products sold on our website are custom cut to the lengths and sizes selected by the customer at the time of purchase. These are not stocked as pre-cut items. Because each order is cut specifically to customer specifications, all cut materials are considered custom products and are not eligible for cancellation, return, or exchange once production has begun. Our standard cutting tolerances are:
