Starrett 57537 A2 Tool Steel Air-hardening Flat Stock

Product Description

The STARRETT 57537 is an A2 air-hardening tool steel flat stock bar intended for toolmakers, machinists, and die makers who require a precision-ground blank ready for heat treatment. The bar measures 0.5 inches thick, 1.5 inches wide, and 18 inches long, and weighs 3.83 pounds. A2 tool steel offers a good balance of wear resistance and toughness, with lower distortion during air hardening compared to oil-hardening grades. This makes it a reliable choice for punches, dies, gauges, and other precision tooling applications where dimensional stability through heat treat is critical.

This flat stock is used in job shops, tool and die facilities, and maintenance departments where custom tooling is fabricated in-house. The bar ships in an annealed, machinable condition and is sized for direct use as a die blank, punch blank, or fixture component. Tradespeople and machinists working with stamping dies, blanking dies, and forming tooling will find this bar ready to machine to final print dimensions before hardening.

Key Features

• AISI A2 air-hardening tool steel construction for reduced distortion during heat treatment
• Thickness tolerance of plus or minus 0.001 inches for precision fitment
• Width tolerance of plus 0.000 to 0.005 inches
• Length tolerance of plus 0.250 inches
• Square tolerance of plus or minus 0.001 inches
• Annealed condition allows direct machining prior to hardening

Compatibility

Designed as a standard A2 air-hardening tool steel flat stock blank suitable for fabrication of punches, dies, gauges, and precision fixture components in tool and die applications.

Installation Notes

Machining should be completed in the annealed condition before heat treatment. Air hardening should be performed by a qualified heat treater following AISI A2 tool steel specifications. Appropriate personal protective equipment and ventilation are required during grinding and machining operations. Follow all applicable shop safety standards when cutting, grinding, or heat treating tool steel.