Starrett 54599 A2 Tool Steel Flat Stock 1/8x6x18 in

Product Description

The STARRETT 54599 is an A2 air-hardening tool steel flat stock bar used in toolmaking, die making, and precision machining applications. Measuring 0.125 inches thick, 6 inches wide, and 18 inches long, this flat stock ships in an annealed condition ready for machining before hardening. AISI A2 tool steel offers good dimensional stability during heat treatment and high wear resistance after hardening, making it a reliable choice for punches, dies, gauges, and similar precision tooling components. Licensed machinists, tool and die makers, and industrial maintenance technicians are the primary installers and users of this material.

This flat stock is suited for both job shop and production toolroom environments. Its 6-inch width and 18-inch length provide a practical starting blank for a wide range of tooling layouts. The tight thickness tolerance of plus or minus 0.001 inches reduces the amount of surface grinding required before final fitting. A2 material is commonly specified where moderate toughness combined with good wear resistance is required, and where air-hardening simplifies the heat-treat process by reducing distortion risk compared to oil-hardening grades.

Key Features

• AISI A2 air-hardening tool steel — reduced distortion during heat treatment compared to oil-hardening grades
• Thickness tolerance of plus or minus 0.001 inches for precise stock removal planning
• Width tolerance of plus 0.000 to 0.005 inches
• Length tolerance of plus 0.250 inches
• Square tolerance of plus or minus 0.001 inches
• Annealed condition — ready for machining prior to hardening

Compatibility

Designed as a standard AISI A2 air-hardening tool steel flat stock suitable for general toolroom use including punch and die sets, gauges, fixtures, and precision cutting tools.

Installation Notes

Machining and heat treatment of A2 tool steel should be performed by qualified tool and die makers or machinists familiar with high-carbon alloy steels. Always follow the material manufacturer's recommended preheat, hardening, and tempering temperature ranges for AISI A2 during heat treatment. Use appropriate personal protective equipment when grinding or machining tool steel. De-burr all edges before handling finished blanks.