Black Steel Rectangle Tubing

3/8" Thick, 3" x 6" x 40', Black Steel A500

 is a heavy-duty structural steel product designed for strength, durability, and consistent performance in demanding applications. Manufactured to A500 standards, this steel is ideal for construction, fabrication, and industrial projects that require reliable, long-lasting materials.

This black steel is engineered for smooth cutting, welding, drilling, and forming. Its 3/8" thickness provides excellent resistance to bending and deformation, while the smooth mill finish ensures precise fabrication and professional results.

The 3/8" Thick, 3" x 6" x 40', Black Steel A500 is highly versatile and suitable for structural frames, load-bearing supports, base plates, machinery components, and custom metalwork projects. It performs reliably under heavy loads and repeated use.

This steel is also cost-effective, offering long service life and minimal maintenance.

Features

Heavy-duty 3/8" A500 structural steel
High load-bearing strength and rigidity
Smooth black mill finish
Excellent weldability and machinability
Resistant to warping and structural fatigue

Includes

Steel Plate – Cut to Size

Get yours now while they still last!