Starrett 54553 A2 Tool Steel Flat Stock 1/8x4x36 in

Product Description

The STARRETT 54553 is an A2 air-hardening tool steel flat stock bar used in toolmaking, die work, and precision machining applications. Measuring 0.125 inches thick, 4 inches wide, and 36 inches long, it is ground to close tolerances on all faces. A2 tool steel offers good wear resistance and dimensional stability through the air-hardening process, making it a reliable choice for punches, dies, gauges, and similar toolroom components. At 5.86 pounds per piece, it is a full-length bar ready for layout and machining. Licensed machinists, tool and die makers, and industrial maintenance technicians work with this material regularly.

This flat stock is suited for job shops, maintenance departments, and toolrooms requiring precision-ground stock with tight dimensional control. The 36-inch length provides enough material for a range of part layouts without excessive waste. The 4-inch width accommodates larger die sections, fixture plates, and wear plates. A2 material is commonly selected when a good balance of toughness and wear resistance is needed and when distortion during heat treatment must be minimized.

Key Features

• A2 air-hardening tool steel per AISI specification — minimal distortion during heat treat
• Thickness tolerance of plus or minus 0.001 inches for consistent stock removal planning
• Width tolerance of plus 0.000 to 0.005 inches
• Length tolerance of plus 0.25 inches
• Square tolerance of plus or minus 0.001 inches with edge squareness of 0.003 per inch
• Ground flat stock format — suitable for immediate layout and machining

Compatibility

Designed as a standard AISI A2 air-hardening tool steel flat stock for use in general toolroom, die-making, and precision fabrication applications requiring ground flat bar stock.

Installation Notes

Cutting and machining of tool steel flat stock should be performed with tooling rated for hardened or semi-hard ferrous materials. Heat treatment should be carried out by a qualified heat treater following AISI A2 recommended austenitizing and air-quench procedures. Deburr all cut edges before handling or layout work. Follow applicable shop safety practices when sawing, grinding, or milling tool steel.