Starrett 54579 A2 Tool Steel Flat Stock 1/4x1-1/2x36 in

Product Description

The STARRETT 54579 is an A2 air-hardening tool steel flat stock bar used in toolmaking, die work, and precision machining applications. Measuring 0.25 inches thick, 1.5 inches wide, and 36 inches long, this flat stock is ground to close tolerances, with a thickness tolerance of plus or minus 0.001 inches and a width tolerance of plus 0.000 to 0.005 inches. The squareness specification holds all edges to 0.003 per inch. Machinists, tool-and-die makers, and industrial maintenance technicians work with this material when fabricating punches, dies, gauges, and similar tooling components that require dimensional consistency before heat treatment.

A2 tool steel is an air-hardening alloy known for its stability during heat treatment and good wear resistance after hardening. This flat stock is suited for both light and moderate production tooling in job shops and manufacturing facilities. The 36-inch length allows for multiple parts to be cut from a single bar, reducing waste in short-run tooling jobs. Its ground surface finish and tight dimensional tolerances make it ready for layout and machining directly from stock.

Key Features

• AISI Type A2 air-hardening tool steel — stable during heat treat with minimal distortion
• Thickness tolerance of plus or minus 0.001 inches for precise fitment in close-tolerance tooling
• Width tolerance of plus 0.000 to 0.005 inches
• Length tolerance of plus 0.25 inches
• Squareness held to 0.003 per inch on all edges
• 36-inch bar length suitable for multiple part cutoffs

Compatibility

Designed as a standard A2 tool steel flat stock for toolmaking, die making, and precision machining applications where air-hardening alloy stock is specified.

Installation Notes

Cutting and machining of tool steel flat stock should be performed by qualified machinists or tool-and-die makers using appropriate cutting tools and coolant. Always use proper personal protective equipment when sawing or grinding tool steel. Heat treatment of A2 steel requires controlled atmosphere or vacuum furnace conditions and should be performed according to the material specification; consult the steel supplier or a qualified heat treater for cycle parameters. Secure the workpiece properly before any cutting or grinding operation to prevent movement.