Starrett 57207 A2 Tool Steel Flat Stock 5/8x1x18 Inch

Product Description

The STARRETT 57207 is an A2 air-hardening tool steel flat stock bar intended for toolmakers, die makers, machinists, and metalworking professionals who require a precision-ground blank ready for further machining, hardening, and finishing. This bar measures 0.625 inches thick, 1 inch wide, and 18 inches long. It is manufactured from AISI Type A2 tool steel, a versatile air-hardening grade known for its good dimensional stability during heat treatment, moderate toughness, and strong wear resistance. The 57207 ships in the annealed condition and is suitable for cutting tools, punches, dies, gauges, and similar toolroom applications where controlled tolerances are essential.

A2 tool steel flat stock is used across toolroom, die shop, and production machining environments in both job shop and manufacturing settings. The bar stock format allows machinists to rough machine to shape before hardening, then finish grind to final dimensions. Typical applications include blanking dies, form punches, trim dies, mold components, and precision gauging elements. This size is a common general-purpose toolroom blank well suited to moderate-production tooling requirements.

Key Features

• AISI Type A2 air-hardening tool steel for good dimensional stability during heat treat
• Thickness: 0.625 inches with a tolerance of +0.010 to +0.015 inches
• Width: 1 inch 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
• Ships in annealed condition for ease of machining prior to hardening

Compatibility

Designed as a standard toolroom flat stock blank compatible with general die, punch, and gauge fabrication applications requiring AISI A2 air-hardening tool steel in a 0.625 inch by 1 inch cross-section profile.

Installation Notes

Machining and heat treatment of A2 tool steel flat stock should be performed by qualified toolmakers or machinists familiar with tool steel handling procedures. Rough machine to near-net shape before hardening to minimize post-heat-treat grinding. Air-hardening steels must be brought to proper austenitizing temperature in a controlled atmosphere or salt bath furnace to prevent decarburization; consult the material specification or a metallurgical reference for the correct heat treat cycle. Always wear appropriate PPE when cutting, grinding, or handling tool steel bar stock.