A500/A513 Carbon Steel Rectangular Tubing 2in x 4in x 0.25in - Solid

In this review of the A500/A513 Carbon Steel Rectangular Tubing the bottom line is clear: this hot rolled A36 steel tube is for builders, fabricators and hobbyists who need a sturdy, weldable structural tube without paying premium alloy prices. The reviewer found it delivers predictable strength and clean, rust-free arrival for straightforward fabrication work. If you need reliable structural tubing that meets common AMS specifications and is sized precisely at 2in by 4in with a 0.25in wall over a 36in length, this product is a practical, cost-conscious pick.

Key Features

• Structural grade: A500/A513 designation means the tubing is suitable for many structural applications where consistent mechanical performance is required.
• Hot rolled A36 steel: delivers solid strength and general-purpose durability for welding and fabrication projects without specialty material cost.
• Exact dimensions: 2in height, 4in width and a 0.25in wall thickness provide a predictable cross section for calculating loads and fits.
• 36in length: convenient one-piece length for small frames, supports and assemblies that reduces the need for splicing.
• Good weldability: customers report clean welded joints, making it suitable for typical shop welding processes.
• Specification compliance: meets AMS-QQ-A-200/9 which provides an added level of material traceability and acceptance criteria.

Who It's For

This tubing is aimed at fabricators, metalworkers and contractors who need a dependable, low-cost structural member for frames, rails, supports and general shop projects. It is a sensible choice for DIY builders making benches, small trailers, gates or architectural accents where standard carbon steel strength and straightforward welding are sufficient.

Those who need corrosion-resistant, finished or precision-ground tubing, or very thin-wall ornamental tube, should look elsewhere. Likewise, projects requiring alloy steels for elevated temperature or specialized mechanical properties will need a different material than this hot rolled A36 tubing.

Pros & Cons

Pros

• Heavy, substantial feel and consistent dimensions make layout and assembly easier.
• Good weldability and clean welded joints reported by customers for straightforward fabrication.
• Cost-effective structural material that meets AMS-QQ-A-200/9 for general acceptance.

Cons

• Hot rolled surface finish is not mill-scale-free like cold-finished steel, so final aesthetic finishing or paint prep may be required.

Specifications

Material	A500/A513 carbon steel (A36)
Finish	Hot rolled
Height	2in
Width	4in
Wall thickness	0.25in
Length	36in
Standards	Meets AMS-QQ-A-200/9

Our Verdict

The A500/A513 rectangular tubing is a practical, value-driven choice for anyone needing a dependable structural tube for welding and fabrication. It combines familiar A36 hot rolled strength, clear dimensional sizing and good weldability at a low cost, making it an excellent option for builders and shop fabricators who prioritize function and value over cosmetic finish.

Frequently Asked Questions

Is this tubing ready to weld?
Yes, the hot rolled A36 material is weldable and customers report good welded joints, though surface prep may be needed for paint or cosmetic finishes.

What are the exact external dimensions?
The tube measures 2in in height by 4in in width with a 0.25in wall and a 36in overall length.

Is this tubing suitable for structural use?
Yes, A500 is commonly used for structural tubing and this product meets AMS-QQ-A-200/9 for acceptance criteria.