Starrett 57547 A2 Tool Steel Flat Stock 0.125x1.75x18 in

Product Description

The STARRETT 57547 is an A2 air-hardening tool steel flat stock bar used in toolmaking, die making, and precision machining applications. Manufactured from AISI Type A2 tool steel, this flat stock measures 0.125 inches thick, 1.75 inches wide, and 18 inches long, with a shipping weight of 1.12 pounds. A2 tool steel offers good dimensional stability during heat treatment, moderate toughness, and high wear resistance, making it a reliable choice for punches, dies, gauges, and similar toolroom components. Machinists, tool and die makers, and maintenance professionals use this stock as a starting blank for custom tooling fabrication.

This flat stock is suited for job shops, toolrooms, and maintenance departments that require precision-ground blanks ready for layout, machining, and subsequent heat treatment. The air-hardening characteristic of A2 steel reduces distortion compared to oil-hardening grades, which is important when tight final dimensions are required after hardening. The 18-inch length provides a practical working blank for a range of die and punch applications.

Key Features

• AISI Type A2 air-hardening tool steel for reduced distortion during heat treat
• Thickness: 0.125 inches with a tolerance of +0.010 to 0.015 inches
• Width: 1.75 inches with a tolerance of +0.010 to 0.015 inches
• Length: 18 inches with a tolerance of +0.25 inches
• Square tolerance of +0.010 to 0.015 inches for consistent cross-section geometry
• Single-piece quantity — no minimum bundle requirement

Compatibility

Designed as a general-purpose A2 tool steel flat stock blank suitable for toolroom fabrication of punches, dies, gauges, and precision components requiring air-hardening tool steel material.

Installation Notes

Cutting, grinding, and machining of tool steel should be performed by qualified machinists or tool and die makers using appropriate cutting fluids and tooling rated for high-alloy steels. Heat treatment of A2 tool steel requires controlled atmosphere or vacuum furnace equipment to achieve specified hardness; follow the material supplier hardening guidelines for austenitizing temperature and quench method. Always allow the stock to reach ambient temperature before precise layout or measurement. Use appropriate personal protective equipment when cutting or grinding hardened or unhardened tool steel.