Starrett 57209 A2 Tool Steel Flat Stock 5/8x2x18 Inch

Product Description

The STARRETT 57209 is an A2 air-hardening tool steel flat stock bar used in tool and die making, jig fabrication, punch and die sets, and precision machining applications. Manufactured from AISI Type A2 tool steel, this flat stock measures 0.625 inches thick, 2 inches wide, and 18 inches long. A2 tool steel is known for its excellent dimensional stability during heat treatment and good wear resistance after hardening, making it a reliable choice for toolroom stock. This bar ships ready to cut, grind, or machine to final dimensions before heat treat. Machinists, toolmakers, and die makers are the primary end users.

This flat stock is suited for fabricating cutting tools, forming dies, blanking punches, gauges, and wear plates in both production and job-shop environments. The 18-inch length provides practical working stock for most toolroom applications. The annealed condition allows full machining prior to hardening. Thickness tolerances of plus 0.010 to 0.015 inches, width tolerances of plus 0.010 to 0.015 inches, and a length tolerance of plus 0.25 inches are held at the mill, reducing prep time at the bench.

Key Features

• AISI Type A2 air-hardening tool steel for stable, low-distortion heat treatment
• Flat stock profile: 0.625 inches thick by 2 inches wide by 18 inches long
• Thickness tolerance held at plus 0.010 to 0.015 inches for consistent stock removal
• Width tolerance of plus 0.010 to 0.015 inches and length tolerance of plus 0.25 inches
• Square tolerance of plus 0.010 to 0.015 inches for accurate layout and fixturing
• Supplied in annealed condition, ready for machining before hardening

Compatibility

Designed as standard AISI A2 air-hardening tool steel flat stock for use in toolroom, die shop, and precision machining applications requiring a medium-alloy, air-hardening grade.

Installation Notes

Machining and grinding of A2 tool steel should be performed in the annealed condition prior to heat treatment. Heat treating, hardening, and tempering operations should be carried out by a qualified heat treat technician following established metallurgical procedures for AISI A2 tool steel. Always use appropriate personal protective equipment when cutting, grinding, or handling tool steel stock. Verify final dimensions after rough machining and before hardening, as stock may require a finish grind after heat treat to reach final tolerance.