Starrett 57206 A2 Tool Steel Flat Stock 5/8 X 3/4 X 18 in

Product Description

The STARRETT 57206 is an A2 air-hardening tool steel flat stock bar measuring 0.625 inches thick, 0.75 inches wide, and 18 inches long. A2 tool steel is a versatile cold-work die steel known for its excellent dimensional stability during heat treatment and good wear resistance after hardening. This flat stock is precision-ground to close tolerances, making it suitable for fabricating punches, dies, gauges, and cutting tools. It is intended for use by tool and die makers, machinists, and metal fabrication shops that require a reliable, heat-treatable steel bar in a ready-to-machine condition.

This flat stock is used in tool room and production machining environments where tight dimensional control is required before and after heat treatment. Typical applications include the manufacture of blanking dies, form punches, and precision fixtures. The air-hardening characteristic of A2 steel reduces distortion compared to oil-hardening grades, making it well-suited for complex tooling components. The 18-inch length provides a workable blank for most standard tooling fabrication tasks in both job shop and production settings.

Key Features

• A2 air-hardening tool steel with minimal distortion during heat treatment
• Thickness: 0.625 inches with a tolerance of +0.010 to 0.015 inches
• Width: 0.75 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
• AISI Type A2 material specification for traceability and heat-treat consistency

Compatibility

Designed as a standard-format A2 tool steel flat bar suitable for general tool room use in applications requiring AISI A2 cold-work die steel in flat stock form.

Installation Notes

Machining and heat treatment of A2 tool steel should be performed by qualified tool and die makers or machinists familiar with cold-work die steels. Follow the steel manufacturer's recommended austenitizing and tempering temperatures for A2 to achieve the desired hardness. Always use appropriate personal protective equipment when cutting, grinding, or machining tool steel. Secure the workpiece firmly before any cutting operations to prevent movement and ensure dimensional accuracy.