Starrett 57584 A2 Tool Steel Flat Stock 0.25x3.5x18 in

Product Description

The STARRETT 57584 is an A2 air-hardening tool steel flat stock bar intended for toolmakers, machinists, and die makers who need a dimensionally consistent steel blank for fabricating punches, dies, gauges, and cutting tools. This flat stock measures 0.25 inches thick, 3.5 inches wide, and 18 inches long, with a shipping weight of 4.46 pounds. Thickness, width, and square tolerances are held to a tight +0.010 to 0.015 inches, and length tolerance is held to +0.25 inches. A2 tool steel is prized for its stable, low-distortion air-hardening characteristics, making it a reliable choice when dimensional accuracy after heat treatment is critical.

This flat stock is suited for job shop, toolroom, and production environments where a ready-to-machine A2 blank reduces prep time. Typical applications include die sections, forming tools, trim dies, stripper plates, and precision gauging components. The 18-inch length provides enough stock for multiple shorter workpieces, and the 3.5-inch width accommodates a wide range of die and punch geometries without additional jointing or welding. It is sold as an individual piece with a minimum order quantity of one.

Key Features

• A2 air-hardening tool steel construction for low distortion during heat treatment
• Tight thickness, width, and square tolerances of +0.010 to 0.015 inches for consistent machining stock
• Length tolerance of +0.25 inches allows predictable cutoff planning
• 0.25 inches thick by 3.5 inches wide by 18 inches long — ready-to-machine flat bar profile
• AISI Type A2 material specification meets standard toolroom requirements
• Sold individually with no multi-piece minimum requirement

Compatibility

Designed as a standard AISI A2 air-hardening tool steel flat stock suitable for general toolroom and die-making applications where A2 material specification is required.

Installation Notes

Machining and heat treatment of A2 tool steel should be performed by qualified toolmakers or machinists familiar with tool steel handling procedures. Follow the material supplier and shop safety guidelines when cutting, grinding, or hardening this stock. Proper personal protective equipment including eye protection and gloves is required during all machining operations. Heat treatment should be performed according to AISI A2 specifications for austenitizing temperature, quench method, and tempering cycle to achieve the intended hardness and dimensional stability.