Starrett 57175 A2 Tool Steel Flat Stock 0.25x4x18 in

Product Description

The STARRETT 57175 is an A2 air-hardening tool steel flat stock blank used in toolmaking, die making, and precision machining applications. Measuring 0.25 inches thick, 4 inches wide, and 18 inches long, this flat stock is manufactured to tight dimensional tolerances: thickness tolerance of +0.010 to 0.015 inches, width tolerance of +0.010 to 0.015 inches, length tolerance of +0.25 inches, and square tolerance of +0.010 to 0.015 inches. A2 tool steel offers good wear resistance and toughness with low distortion during air hardening, making it a preferred choice for punches, dies, gauges, and similar precision tooling components. Weighing approximately 5.1 pounds, this piece is ready for machining and heat treatment by qualified tool and die makers.

This flat stock is suited for toolrooms, machine shops, and fabrication facilities requiring precision-ground or precision-tolerance A2 tool steel in manageable flat bar form. Common applications include cutting dies, forming tools, press brake tooling, and gauging fixtures where dimensional stability through heat treatment is critical. The 18-inch length provides sufficient stock for most single-piece tool fabrication jobs without excessive material waste. This material is typically worked by experienced tool and die makers or machinists operating conventional or CNC equipment.

Key Features

• AISI A2 air-hardening tool steel — low distortion during heat treatment compared to oil-hardening grades
• Thickness: 0.25 inches with tolerance of +0.010 to 0.015 inches
• Width: 4 inches with tolerance of +0.010 to 0.015 inches
• Length: 18 inches with tolerance of +0.25 inches
• Square tolerance held to +0.010 to 0.015 inches for consistent stock alignment
• Ships as a single flat bar piece — no minimum order beyond one unit

Compatibility

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

Installation Notes

Machining and heat treatment of A2 tool steel should be performed by qualified tool and die makers or machinists familiar with the handling of hardening-grade tool steels. Follow the material manufacturer's recommended heat treatment cycle for A2 steel, including proper preheating and air-quench hardening procedures. Use appropriate personal protective equipment when grinding or machining tool steel stock. Consult applicable shop safety standards and codes before cutting or heat-treating this material.