A500/A513 Carbon Steel Rectangular Tubing 2in x 3in x 36in - Durable

In this review the OnlineMetals A500/A513 carbon steel rectangular tubing is judged primarily on its suitability for structural and fabrication projects; the bottom line is that hobbyists and professionals who need a low-cost, weldable, and sturdy tube will find it reliable. The reviewer found the tubing to be true to size, with a solid hot-rolled feel and good weight that communicates quality. For anyone needing a simple, ready-to-weld rectangular section for frames, supports, or repair work, this tubing delivers straightforward performance without unnecessary finish or pretension.

Key Features

• Material quality: A500/A513 hot-rolled carbon steel offers reliable strength and is well suited to structural and fabrication tasks that require weldability.
• Dimensions: The 2in height by 3in width with a 0.12in wall and 36in length gives a predictable geometry for making frames, supports, and cross-members.
• Industry standard: Meets ASTM A513 specifications, which helps ensure consistent composition and mechanical properties for engineering use.
• Weldability: The steel is straightforward to weld and machine, making it practical for custom assemblies and on-site modifications.
• Value: The tubing offers a low-cost raw material option without sacrificing basic strength or functional quality for many projects.

Who It's For

The tubing is best for metal fabricators, small contractors, home workshop users, and hobbyists who need a sturdy, weldable rectangular section for projects such as light structural framing, automotive brackets, appliance parts, or fencing components. Its hot-rolled finish and ASTM compliance make it useful where dimensional consistency and predictable mechanical behavior matter.

Those needing finished, corrosion-resistant, or architectural-grade polished tubing should look elsewhere; this product arrives with a hot-rolled surface and is intended as raw material that may require coating or painting for outdoor use in corrosive environments.

Pros & Cons

Pros

• Good strength-to-cost ratio makes it economical for structural builds and repairs.
• Customers report clean deliveries with no visible rust and well-executed welds, validating the material quality.
• The 2in x 3in x 36in size with 0.12in wall thickness is versatile for many framing and fabrication tasks.

Cons

• Hot-rolled finish is not decorative and will require painting or coating for exposed or aesthetic applications.

Specifications

Our Verdict

The OnlineMetals A500/A513 rectangular tubing is a practical, no-frills choice for builders and fabricators who need dependable structural steel at a reasonable price. Its weldability, accurate dimensions, and ASTM compliance make it a good value for functional applications; buy it when you need solid, work-ready raw tubing rather than finished, decorative metalwork.

Frequently Asked Questions

Is this tubing ready to weld?
Yes. The A500/A513 carbon steel is hot-rolled and suitable for common welding processes, though surface prep is recommended.

Will it rust in outdoor use?
The tubing can rust if left uncoated; apply paint or a protective finish for long-term outdoor exposure.

Are the dimensions accurate for fabrication?
Customers report the dimensions are as specified (2in x 3in x 36in with 0.12in wall), making it reliable for measured cuts and assemblies.