Starrett 57518 A2 Tool Steel Flat Stock 3/16x1/2x18 in

Product Description

The STARRETT 57518 is an A2 air-hardening tool steel flat stock bar used in toolmaking, die work, and precision machining applications. This flat stock measures 3/16 inch thick, 1/2 inch wide, and 18 inches long, with tight tolerances throughout: thickness and squareness held to plus or minus 0.001 inch, width held to plus 0.000 to plus 0.005 inch, and length to plus 0.250 inch. AISI A2 tool steel offers good wear resistance and dimensional stability through the hardening process, making it a reliable choice for blanks, gauges, punches, and similar toolroom work. The piece weighs 0.48 pounds.

A2 air-hardening flat stock is used in job shops, toolrooms, and maintenance departments where machinists and tool-and-die makers need a ready-to-machine bar that holds its shape during heat treatment. The air-hardening characteristic of A2 reduces distortion compared to oil-hardening grades, which is important when final dimensions matter. This stock is suited for fabricating custom tooling, fixtures, blades, and wear parts in both production and repair environments.

Key Features

• AISI A2 air-hardening tool steel for reduced distortion during heat treatment
• Thickness tolerance of plus or minus 0.001 inch for precision fitment
• Width tolerance of plus 0.000 to plus 0.005 inch
• Squareness tolerance of plus or minus 0.001 inch
• Length tolerance of plus 0.250 inch
• Ready-to-machine bar stock requiring no additional preparation before use

Compatibility

Designed as a standard A2 tool steel flat stock blank suitable for toolroom, die-making, and general precision machining applications wherever AISI A2 air-hardening material is specified.

Installation Notes

Machining and heat treatment of A2 tool steel should be performed by qualified toolmakers or machinists familiar with tool steel handling procedures. Always wear appropriate personal protective equipment when cutting, grinding, or machining this material. Follow the steel supplier or heat treater recommendations for austenitizing temperature and air-quench procedures specific to A2 grade. Deburr all edges before handling finished parts.