Starrett 57311 A2 Tool Steel Flat Stock 3/32x3/4x36 in

Product Description

The STARRETT 57311 is an A2 air-hardening tool steel flat stock bar intended for toolmakers, machinists, and die makers who need a precision-ground blank for punches, dies, gauges, and similar tooling applications. The bar measures 3/32 inch thick, 3/4 inch wide, and 36 inches long, with a thickness tolerance of plus or minus 0.001 inch and a width tolerance of plus 0.000 to 0.005 inch. Length tolerance is plus 0.25 inch. These tight tolerances reduce layout and grinding time before heat treatment. A2 tool steel responds well to air-hardening, making it a practical choice where dimensional stability during heat treat is a priority.

This flat stock is suited for job shops, tool-and-die operations, and maintenance departments that fabricate or repair tooling in-house. The 36-inch length allows a single bar to yield multiple blanks for small- to medium-run tooling components. The 3/32-inch thickness is commonly used for thin punches, wear plates, and small forming tools. Typical users include tool and die makers, precision machinists, and industrial maintenance technicians working in both production and prototype environments.

Key Features

• AISI A2 air-hardening tool steel for dimensional stability during heat treatment
• Thickness tolerance of plus or minus 0.001 inch for precise blank-to-print fitment
• Width tolerance of plus 0.000 to 0.005 inch
• Length tolerance of plus 0.25 inch
• Squareness held to 0.003 inch per inch on all edges
• Square tolerance of plus or minus 0.001 inch

Compatibility

Designed as a standard A2 air-hardening tool steel flat stock blank suitable for machining, grinding, and heat-treating applications in tool-and-die and general precision machining contexts.

Installation Notes

Cutting, grinding, and heat treatment of tool steel should be performed by qualified machinists or tool and die makers using appropriate personal protective equipment. Follow the material manufacturer and shop safety guidelines when machining or hardening A2 tool steel. Ensure all cutting and grinding equipment is properly guarded. Heat treatment should follow established A2 hardening and tempering procedures appropriate for the intended application.