Starrett 57183 A2 Tool Steel Flat Stock 5/16x4x18 Inch

Product Description

The STARRETT 57183 is an A2 air-hardening tool steel flat stock blank used in toolmaking, die making, and precision machining applications. Measuring 5/16 inch thick by 4 inches wide by 18 inches long, this piece ships in an oversize, ground condition that allows machinists and tool-and-die professionals to cut, shape, and heat-treat to final dimensions. A2 tool steel offers good toughness and wear resistance after hardening, making it a reliable choice for punches, dies, gauges, and similar tooling components. The material conforms to AISI Type A2 specification and arrives ready for layout and machining.

This flat stock is suited for job shops, toolrooms, and maintenance departments that fabricate or repair tooling in-house. The 18-inch length provides enough material for multiple small components or one larger tool blank. The pre-cut flat format reduces saw time and material waste compared to ordering bar stock. Machinists, tool-and-die makers, and maintenance machinists are the primary users for this type of stock.

Key Features

• AISI A2 air-hardening tool steel for good wear resistance and dimensional stability during heat treat
• Dimensions: 5/16 inch thick x 4 inches wide x 18 inches long
• Thickness tolerance: +0.010 to 0.015 inches
• Width tolerance: +0.010 to 0.015 inches
• Length tolerance: +0.25 inches
• Square tolerance: +0.010 to 0.015 inches

Compatibility

Designed as a standard A2 tool steel flat stock blank suitable for toolroom fabrication of punches, dies, gauges, and general tooling components requiring air-hardening steel.

Installation Notes

Machining and heat treatment of A2 tool steel should be performed by qualified machinists or tool-and-die makers familiar with air-hardening steel procedures. Follow the material supplier guidelines and applicable shop safety standards when cutting, grinding, or heat treating. Appropriate personal protective equipment including eye protection and heat-resistant gloves is required during heat treat operations. Always allow the workpiece to reach ambient temperature before final inspection or finishing.