Starrett 57578 A2 Tool Steel Flat Stock 3/16x8x18 in

Product Description

The STARRETT 57578 is an A2 air-hardening tool steel flat stock bar used in toolmaking, die making, and precision machining applications. Measuring 3/16 inches thick, 8 inches wide, and 18 inches long, this flat stock is manufactured to tight dimensional tolerances, with thickness, width, and square tolerances held to +0.010 to 0.015 inches and a length tolerance of +0.25 inches. A2 tool steel is known for its good wear resistance and dimensional stability during heat treatment, making it a reliable choice for punches, dies, gauges, and other precision tooling components. The piece weighs 7.68 pounds.

This flat stock is suited for machine shops, toolrooms, and fabrication environments where close-tolerance A2 tool steel is required in a ready-to-machine form. It is commonly worked by machinists and tool-and-die makers who require stock that can be heat treated to high hardness after rough machining. The 8-inch width and 18-inch length provide sufficient material for a range of medium-scale tooling and fixture applications without requiring further breakdown from larger mill stock.

Key Features

• A2 air-hardening tool steel per AISI designation, offering good toughness and wear resistance
• Thickness: 3/16 inches with +0.010 to 0.015 inches tolerance
• Width: 8 inches with +0.010 to 0.015 inches tolerance
• Length: 18 inches with +0.25 inches tolerance
• Square tolerance held to +0.010 to 0.015 inches for consistent right-angle geometry
• Ready-to-machine flat stock format minimizes prep time in the toolroom

Compatibility

Designed as a standard A2 air-hardening tool steel flat stock suitable for use in toolmaking, die making, punch fabrication, and precision fixture work where AISI A2 material specification is required.

Installation Notes

A2 tool steel flat stock is machined, ground, and heat treated by qualified tool-and-die makers or machinists. All grinding and machining should be completed before hardening unless otherwise specified by the application. Air-hardening process for A2 steel requires controlled furnace heat treatment followed by still-air cooling — consult your heat treater for specific cycle parameters. Proper eye and hand protection should be used during all cutting and grinding operations.