Starrett 57312 A2 Tool Steel Flat Stock 3/32x1x36 in

Product Description

The STARRETT 57312 is an AISI A2 air-hardening tool steel flat stock bar used in toolmaking, die work, and precision machining applications. It measures 3/32 inches thick by 1 inch wide by 36 inches long and ships at a weight of 1.1 pounds. A2 tool steel offers good dimensional stability during heat treatment and high wear resistance after hardening, making it a go-to choice for punches, dies, gauges, and fixture components. Machinists and tool-and-die makers rely on this grade for work that demands tight tolerances in the annealed state before hardening.

This flat stock is suited for fabrication shops, tool rooms, and maintenance departments that work with precision tooling or custom fixtures. The 36-inch length provides enough material for most single-part applications without requiring additional cutting from a full bar. A2 air-hardening steel is commonly chosen when distortion control during heat treatment is critical, especially on thin cross-sections like this 3/32-inch thickness. It is appropriate for both one-off tool repairs and short-run production of hardened components.

Key Features

• AISI A2 air-hardening tool steel for controlled distortion during hardening
• Thickness tolerance of plus or minus 0.001 inches for close-tolerance tooling work
• Width tolerance of plus 0.000 to 0.005 inches
• Length tolerance of plus 0.25 inches
• Squareness held to 0.003 inches per inch on all edges
• Annealed condition for machining prior to heat treat

Compatibility

Designed as a standard A2 tool steel flat stock suitable for use in toolmaking, die making, punch fabrication, and precision fixture work where air-hardening steel is specified.

Installation Notes

Cutting, grinding, and machining of tool steel flat stock should be performed by qualified machinists or tool-and-die makers using appropriate cutting fluids and carbide or high-speed tooling. Secure the workpiece firmly before machining to avoid deflection on thin cross-sections. Heat treatment should be performed by a qualified heat treater following established procedures for A2 tool steel; improper hardening or tempering can result in cracking or inadequate hardness. Always wear appropriate personal protective equipment when cutting or grinding tool steel.