A500/A513 Carbon Steel Rectangular Tubing 2in x 3in x 72in - Solid

Our review examines the OnlineMetals A500/A513 carbon steel rectangular tubing and why it is a straightforward choice for basic structural work and fabrication. For contractors, hobbyist fabricators, and repair shops needing a reliable, economical rectangular tube, this product stands out for its balance of strength and weldability. In this review the single biggest reason to buy is its practical combination of common A36 hot-rolled steel chemistry and a familiar 2in by 3in by 72in size that fits many framing, support, and DIY projects without specialty ordering.

Key Features

• Material and standard: Hot rolled A36 steel meets ASTM-A513 and commonly available A500 specifications for general structural use, giving predictable mechanical properties for fabrication.
• Dimensions: The 2in height, 3in width and 72in length provide a convenient standard rectangular profile that simplifies cutting and planning for frames or supports.
• Wall thickness: With a 0.083in wall, the tubing offers a balance of weight and rigidity suitable for light to medium duty structural applications.
• Weldability: Customers report good welded quality, meaning it accepts common welding processes without unusual preparation or postwork.
• Value: As a widely used steel tubing type, it delivers low cost per foot compared with specialty alloys, making it practical for projects where cost matters.
• Finish: The hot rolled surface is typical for A36 and arrives clean in many cases, reducing immediate prep for painting or assembly.

Who It's For

This tubing is aimed at builders, metal shops, and DIYers who need an affordable, reliable rectangular steel section for structural framing, supports, gates, racks, or furniture projects. Its standard 2in by 3in profile and 72in length make it easy to plan cuts and weld joints in common shop setups.

Those who require stainless resistance, precision cold-rolled finishes, or specialty alloys for corrosion-critical marine environments should look elsewhere. Also, if a thicker wall is needed for heavy industrial loadbearing, a heavier-gauge tube would be more appropriate.

Pros & Cons

Pros

• Good overall strength and predictable A36 performance for general structural tasks.
• Well received by customers for weldability and arriving clean with little surface rust.
• Value oriented - common, low-cost material suitable for many builds and repairs.
• Convenient standard length (72in) reduces the need for multiple splices on many projects.

Cons

• Hot rolled finish and A36 chemistry are not corrosion resistant like painted or stainless alternatives.
• At 0.083in wall thickness, it is lightweight and may not suit heavy-duty loadbearing without additional reinforcement.

Specifications

Product type	Rectangular tubing
Material	Hot rolled carbon steel (A36)
Standards	Meets ASTM-A513; ASTM-A500 call for availability
Height	2in
Width	3in
Wall thickness	0.083in
Length	72in

Our Verdict

The OnlineMetals A500/A513 carbon steel rectangular tubing is a sensible, cost-effective choice for common structural and fabrication needs where A36 performance and weldability are sufficient. It is best for contractors and hobbyists who want a standard-sized, easy-to-weld tube that offers good value; it is not intended for corrosion-critical or heavy industrial applications without additional protection or heavier gauge material.

Frequently Asked Questions

Is this tubing weldable?
Yes. The hot rolled A36 chemistry is commonly welded with standard shop processes and customers report good welded quality.

Does it come pre-finished against rust?
The tube is hot rolled A36 and typically arrives clean, but it is not stainless or painted; surface protection is recommended for long-term outdoor use.

Is ASTM-A500 guaranteed?
The product meets ASTM-A513 and ASTM-A500 is available on request, so contact the supplier for availability and specific certification if A500 is required.