0.375in x 1in 1018 Cold Rolled Carbon Steel Rectangle Bar - 72in Cut

In this review of the 0.375in x 1in 1018 Cold Rolled ASTM A108 Carbon Steel Rectangle Bar, the bottom line is simple: this bar is for fabricators and machinists who need a stable, easy-to-machine rectangular stock in a ready-to-use 72in cut length. The reviewer found the material strikes a practical balance between strength and workability, offering a smooth finish and predictable behavior during machining and welding. For projects that require flat surfaces, tight tolerance corners, and consistent feedthrough on lathes or mills, this bar is a reliable, no-frills choice.

Key Features

• MATERIAL COMPOSITION: 1018 cold rolled ASTM A108 carbon steel provides low-carbon, general-purpose properties suited to moderate strength applications.
• VERSATILE APPLICATIONS: The rectangular shape and material work well for machining, welding, cold forming, and a variety of general fabrication tasks.
• MECHANICAL PROPERTIES: Excellent ductility and consistent machinability make the bar predictable under cutting, drilling, and forming operations.
• SHAPE SPECIFICATIONS: Rectangular bar format supplies flat faces and sharp corners for accurate fixturing and dimension control in assemblies.
• MACHINING CHARACTERISTICS: Good weldability and the ability to case harden allow for enhanced wear resistance when needed.
• SURFACE FINISH: Cold-rolled smooth finish reduces prep work before finishing or plating, saving time in production.

Who It's For

This bar is aimed at small shops, prototypers, and hobby machinists who need consistent, mill-ready rectangular stock that machines predictably and welds well. It is also appropriate for production runs of brackets, pins, shafts, and other mechanical components where moderate strength and good surface quality matter.

Those who require high alloy steels, very high hardness out of the box, or tight corrosive-environment specifications should look elsewhere. If extreme tensile strength or stainless corrosion resistance are primary concerns, select a different grade.

Pros & Cons

Pros

• Consistent cold-rolled surface finish reduces initial preparation time before machining or coating.
• Good ductility and machinability make cutting, drilling, and forming straightforward for most shop tooling.
• Rectangular shape with tight tolerance edges enables accurate fixturing and repeatable part geometry.
• Weldable and can be case hardened for improved wear resistance when required.

Cons

• As a low-carbon general-purpose steel, it does not provide high hardness or corrosion resistance without additional treatment.
• Limited to moderate strength applications; not suitable when high-strength alloyed steel is required.

Specifications

Our Verdict

The 0.375in x 1in 1018 cold rolled rectangle bar is a solid, cost-effective choice for machinists and fabricators who need reliable, easy-to-machine rectangular stock in a 72in length. Its smooth finish and predictable behavior make it good value for general-purpose components, fixtures, and small structural parts, provided your project does not demand high alloy strength or intrinsic corrosion resistance.

Frequently Asked Questions

Can this bar be welded?
Yes. 1018 cold rolled steel offers good weldability for typical fabrication processes.

Is the surface ready for machining?
The cold-rolled smooth finish reduces prep work and is well suited for direct machining and finishing.

Can it be hardened for wear resistance?
Yes. The material can be case hardened to improve surface wear resistance after fabrication.