OnlineMetals A500/A513 Carbon Steel Rectangular Tubing 1.5in x 3in

In this review the OnlineMetals A500/A513 carbon steel rectangular tubing is evaluated for fabricators, hobbyists, and contractors who need a reliable structural tube. The bottom line: it is a straightforward, economical choice when strength and weldability matter most. Buyers who want a heavy, well-formed section for frames, supports, or general structural use will appreciate the combination of material grade and clean finish; the review focuses on real-world usability, weld quality, and the specific dimensions that make it suitable for many projects.

Key Features

• Material grade: A500/A513 carbon steel provides good strength and dependable structural performance for load-bearing applications.
• Weldability: The steel accepts common welding methods cleanly, making it practical for fabrication and repairs without special procedures.
• Dimensions: The 1.5in height, 3in width and 0.12in wall thickness give a balanced profile for light- to medium-duty frames and supports.
• Length: The 24in stock length is convenient for small builds and reduces waste compared with longer lengths when cutting is necessary.
• Standards: Meets ASTM-A513, which helps ensure consistent manufacture and predictable mechanical behavior for engineering use.

Who It's For

This tubing is aimed at metalworkers, builders, and DIYers who need a cost-effective structural tube that is easy to weld and sized for common small-structure tasks. It is a good fit for applications like equipment frames, braces, small gates, and prototypes where a sturdy rectangular section is required.

Those who need corrosion-resistant or finished surfaces for outdoor or decorative projects should consider a coated or stainless option instead, since this hot-rolled carbon steel is best for functional structural use rather than high-exposure exterior aesthetics.

Pros & Cons

Pros

• Good strength-to-cost ratio makes it an economical choice for structural work.
• Customers report clean, rust-free arrival and solid welded quality, indicating reliable manufacturing.
• The 1.5in x 3in profile with 0.12in wall offers useful rigidity for many small to medium projects.

Cons

• As hot-rolled carbon steel, it is not inherently corrosion resistant and may need protection for outdoor use.

Specifications

Product Type	Rectangular tubing
Material	A500/A513 carbon steel (ASTM-A513)
Height	1.5in
Width	3in
Wall Thickness	0.12in
Length	24in

Our Verdict

The OnlineMetals A500/A513 rectangular tubing is a sensible, value-focused option for anyone building functional steel frames or supports. Its good weldability, clean delivery, and standard dimensions make it practical for workshops and small contractors, though projects exposed to weather will need a protective finish for long-term durability.

Frequently Asked Questions

Is this tubing ready to weld out of the box?
Yes, the A500/A513 steel is commonly welded with standard methods and arrives in a clean condition suitable for welding.

Will this hold up outdoors without treatment?
Not long-term; as hot-rolled carbon steel it should be painted or otherwise protected for exterior exposure.

Is the length suitable for small projects?
Yes, the 24in length is convenient for many small builds and reduces the need for cutting longer stock.