Starrett 55004 Low Carbon Steel Flat Stock Aisi C1018

Product Description

The STARRETT 55004 is a low carbon steel flat stock bar made to AISI Type C1018 material specification. It measures 24 inches in length, 1-1/4 inches in width, and 5/8 inches in thickness, with a finished weight of 5.3 pounds. C1018 is a mild, low carbon steel widely used in machining, fabrication, and toolmaking applications where moderate strength and good machinability are required. This flat stock is held to tight tolerances: thickness and squareness are controlled to plus or minus 0.001 inches, width tolerance runs plus 0.000 to 0.005 inches, and length tolerance is plus 0.625 inches. It is stocked in single-piece quantities and suited for trade shops, maintenance machinists, and fabricators.

This flat stock is used in general metalworking, fixture building, jig fabrication, and maintenance repair operations. It is appropriate for both job shops and field fabrication environments where C1018 cold-drawn or turned flat bar is specified. Typical applications include brackets, spacers, wear plates, guide rails, and custom tooling components. The consistent dimensional tolerances make it well suited for applications requiring close-fit assembly without additional surface grinding.

Key Features

• AISI Type C1018 low carbon steel — good machinability and weldability
• Thickness tolerance: plus or minus 0.001 inches for close-fit applications
• Width tolerance: plus 0.000 to 0.005 inches
• Length tolerance: plus 0.625 inches
• Squareness tolerance: plus or minus 0.001 inches
• Single-piece packaging with no minimum order multiplier beyond one unit

Compatibility

Designed as a standard AISI C1018 low carbon steel flat stock suitable for general metalworking, fabrication, and machining operations where this material grade and size are specified.

Installation Notes

Cutting, drilling, or welding should be performed by qualified machinists or fabricators using tools rated for steel stock. Always wear appropriate PPE including eye protection and gloves when cutting or grinding. Deburr all cut edges before assembly to avoid fitment interference or injury. When welding C1018 steel, follow applicable AWS guidelines for filler metal selection.