Starrett 54621 A2 Tool Steel Flat Stock 0.25x1.25x18 in

Product Description

The STARRETT 54621 is an A2 air-hardening tool steel flat stock bar used in toolmaking, die work, and precision machining applications. It measures 0.25 inches thick, 1.25 inches wide, and 18 inches long, with a weight of 1.6 pounds. Manufactured to AISI A2 tool steel specification, this flat stock holds tight dimensional 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 offers good wear resistance and dimensional stability through the air-hardening process, making it a reliable choice for blanks, punches, gauges, and similar toolroom components.

This flat stock is suited for machine shops, toolrooms, and die shops requiring a machinable blank that can be finish-ground and hardened in-house. The 18-inch length provides enough stock for multiple smaller workpieces or a single elongated component. A2 air-hardening steel is commonly selected when oil-hardening grades introduce distortion risk, as the air-quench cycle produces less movement through heat treatment. Machinists and toolmakers working in job shops or maintenance facilities will find this bar useful for replacement dies, wear plates, and fixture components.

Key Features

• AISI A2 air-hardening tool steel for reduced distortion during heat treatment
• Tight thickness tolerance of plus or minus 0.001 inches for precision fitment
• Width tolerance held to plus 0.000 to 0.005 inches for consistent stock removal
• Squareness tolerance of plus or minus 0.001 inches supports accurate layout and grinding
• 18-inch length with a plus 0.250-inch length tolerance provides usable overstock
• Ready-to-machine flat bar profile suitable for blanks, punches, wear plates, and gauges

Compatibility

Designed as a general-purpose A2 tool steel flat bar for toolroom and machine shop use where AISI A2 air-hardening material specification is required.

Installation Notes

Cutting and machining of tool steel flat stock should be performed by qualified machinists using appropriate carbide or high-speed tooling. All grinding, drilling, and heat-treating operations should follow standard toolroom practices and applicable shop safety procedures. Secure the workpiece properly before any machining operation to prevent movement. Heat treatment should be performed by a qualified heat treater following AISI A2 austenitizing and air-quench parameters.