Starrett 54591 A2 Tool Steel Flat Stock 0.125x1.5x18 in

Product Description

The STARRETT 54591 is an A2 air-hardening tool steel flat stock bar used in toolmaking, die work, and precision machining applications. It measures 0.125 inches thick, 1.5 inches wide, and 18 inches long, with a weight of 0.96 pounds. Manufactured to AISI A2 material specification, this flat stock is held to tight tolerances: plus or minus 0.001 inches on thickness, plus or minus 0.001 inches on squareness, plus 0.000 to 0.005 inches on width, and plus 0.250 inches on length. A2 tool steel is known for its dimensional stability during air hardening, making it a reliable choice for punches, dies, gauges, and cutting tools where precise geometry after heat treatment is critical.

This flat stock is suited for tool and die shops, machine shops, and maintenance facilities that fabricate or repair tooling in-house. It ships in a single-piece quantity and is ready to be cut, machined, and heat treated to final hardness. A2 air-hardening steel is commonly used where intermediate toughness and wear resistance are needed without the distortion risk associated with oil- or water-hardening grades. It is appropriate for both light-production tooling and prototype work requiring close tolerances.

Key Features

• AISI A2 air-hardening tool steel for minimal distortion during heat treatment
• Thickness tolerance of plus or minus 0.001 inches for precise fit in tooling applications
• Width tolerance of plus 0.000 to 0.005 inches maintains consistent stock dimensions
• Squareness tolerance of plus or minus 0.001 inches supports accurate layout and machining
• Length tolerance of plus 0.250 inches provides usable material for facing or squaring cuts
• Single-piece packaging with no minimum order requirement beyond one unit

Compatibility

Designed as a standard AISI A2 air-hardening flat tool steel bar suitable for general toolmaking, die fabrication, and precision component manufacture where A2 material specification is required.

Installation Notes

Machining and heat treatment of A2 tool steel should be performed by qualified tool and die makers or machinists familiar with air-hardening steel procedures. Follow the material supplier recommendations for preheat, austenitizing temperature, and air-cool quench sequence to achieve target hardness without cracking. Always use appropriate personal protective equipment when grinding or cutting tool steel. Verify final dimensions after heat treatment before committing to finish grinding.