Starrett 57557 A2 Tool Steel Flat Stock 0.125x10x18 in

Product Description

The STARRETT 57557 is an A2 air-hardening tool steel flat stock blank used in toolmaking, die making, and precision machining applications. Measuring 0.125 inches thick, 10 inches wide, and 18 inches long, this piece is supplied in an annealed condition ready for machining, grinding, and subsequent heat treatment. A2 tool steel offers good toughness combined with moderate wear resistance and minimal distortion during air-hardening, making it a reliable choice for punches, dies, forming tools, and gauges. The flat stock ships at 6.38 pounds. Machinists, tool-and-die makers, and industrial tradespeople work with this material in both job shop and production environments.

This flat stock is suited for fabricating precision cutting tools, blanking dies, trim dies, forming dies, and other tooling components where dimensional stability after heat treatment is critical. The air-hardening characteristic of A2 steel reduces warping and cracking risk compared to oil-hardening grades, making it appropriate for larger or complex cross-section tools. It is commonly processed in machine shops, toolrooms, and industrial maintenance departments that require reliable, consistent tool steel in standard flat bar form.

Key Features

• A2 air-hardening tool steel for minimal distortion during hardening
• Thickness tolerance of plus 0.010 to 0.015 inches for predictable stock allowance
• Width tolerance of plus 0.010 to 0.015 inches
• Length tolerance of plus 0.25 inches
• Square tolerance of plus 0.010 to 0.015 inches
• Supplied in annealed condition, ready for machining and finishing before heat treat

Compatibility

Designed as a standard A2 tool steel flat stock blank suitable for toolmaking, die making, and precision machining applications requiring air-hardening tool steel in flat bar form.

Installation Notes

Cutting and machining of tool steel flat stock should be performed by qualified machinists or tool-and-die makers using appropriate tooling and coolant. Always follow established heat treatment procedures for A2 tool steel, including proper soak temperatures and air-cooling protocols, as specified by a qualified metallurgical reference or heat treater. Wear appropriate PPE when cutting, grinding, or handling sharp-edged stock. Do not attempt hardening operations without proper furnace equipment and temperature controls.