Starrett 54690 A2 Tool Steel Flat Stock 3/4x4x36 in

Product Description

The STARRETT 54690 is an A2 air-hardening tool steel flat stock bar intended for toolmakers, machinists, and die makers who require tight dimensional tolerances and predictable heat-treat response. Measuring 0.75 inches thick, 4 inches wide, and 36 inches long, this flat stock is held to a thickness tolerance of plus or minus 0.001 inches, a width tolerance of plus 0.000 to 0.005 inches, and a length tolerance of plus 0.25 inches. A2 tool steel offers good wear resistance and minimal distortion during air-hardening, making it a reliable choice for dies, punches, gauges, and precision tooling components.

This flat stock is suited for job shops, tool-and-die operations, and maintenance machining environments where stock must be cut, ground, or machined to final dimensions before hardening. The 36-inch bar length provides enough material for multiple blanks from a single piece. Typical end uses include blanking dies, forming tools, cutting blades, and precision fixture components where dimensional stability through the hardening process is critical.

Key Features

• AISI A2 air-hardening tool steel with minimal distortion during heat treat
• Thickness tolerance of plus or minus 0.001 inches for precision stock removal planning
• Width tolerance of plus 0.000 to 0.005 inches
• Length tolerance of plus 0.25 inches
• Squareness held to edge all 0.003 inches per inch
• Square tolerance of plus or minus 0.001 inches

Compatibility

Designed as a general-purpose A2 air-hardening tool steel flat stock suitable for toolmaking, die making, and precision machining applications where AISI A2 material specification is required.

Installation Notes

Cutting, grinding, and machining of tool steel flat stock should be performed by qualified machinists or toolmakers using appropriate metalworking equipment. Always use proper personal protective equipment when cutting or grinding steel bar stock. Heat treatment of A2 tool steel should follow the material manufacturer's hardening and tempering guidelines and is typically performed by a qualified heat treater. Handle bars of this weight, approximately 35 pounds, with appropriate lifting precautions to avoid injury.