Starrett 54766 A2 Tool Steel Flat Stock 0.625x6x18 in

Product Description

The STARRETT 54766 is an A2 air-hardening tool steel flat stock bar used in toolmaking, die making, and precision machining applications. It measures 0.625 inches thick, 6 inches wide, and 18 inches long, with a finished weight of 18.96 pounds. A2 tool steel offers good dimensional stability during heat treatment and strong wear resistance after hardening, making it a reliable choice for punches, dies, gauges, and similar toolroom components. Thickness tolerance is held to plus or minus 0.001 inches, and square tolerance matches at plus or minus 0.001 inches, supporting close-tolerance work straight from stock.

This flat stock is suited for job shops, tool and die shops, and maintenance machining operations where pre-sized bar stock reduces setup time. The 0.625 by 6 by 18 inch format provides enough material for medium-sized die plates, fixture bases, or blanks that will be further machined, ground, and heat treated on site. Width tolerance runs plus 0.000 to 0.005 inches and length tolerance is plus 0.250 inches, consistent with standard tool steel flat bar practice. A2 material specification per AISI designates this as an air-hardening grade, so it does not require oil or water quench, which reduces distortion risk during hardening cycles.

Key Features

• A2 air-hardening tool steel per AISI specification — reduced distortion versus oil-hardening grades
• Thickness held to plus or minus 0.001 inches for close-tolerance toolroom use
• Square tolerance of plus or minus 0.001 inches supports accurate layout and machining
• Pre-cut to 0.625 inches thick, 6 inches wide, 18 inches long — ready for immediate machining
• Width tolerance of plus 0.000 to 0.005 inches and length tolerance of plus 0.250 inches per standard flat bar practice

Compatibility

Designed as a standard-format A2 tool steel flat bar suitable for toolmaking, die making, and precision fixture fabrication applications requiring an air-hardening grade material.

Installation Notes

Machining and heat treatment of A2 tool steel should be performed by qualified tool and die makers or machinist tradespeople familiar with high-carbon alloy steels. Follow the material manufacturer recommendations for preheat, austenitizing temperature, and air-cool hardening cycles before any grinding or finish machining. Use appropriate personal protective equipment when cutting, grinding, or handling steel bar stock. Verify final dimensions after stress-relief operations, as minor movement may occur during thermal processing.