Starrett 57561 A2 Tool Steel Flat Stock 5/32x1x18 in

Product Description

The STARRETT 57561 is an A2 air-hardening tool steel flat stock bar used in toolmaking, die making, punch fabrication, and precision machining applications. It measures 5/32 inches thick, 1 inch wide, and 18 inches long, and is supplied in the annealed condition ready for machining before heat treatment. A2 tool steel offers good dimensional stability during air hardening, which reduces distortion compared to oil-hardening grades. This stock is held to tight dimensional tolerances and is suited for machinists, toolmakers, and die shops that require consistent, predictable stock for producing custom tooling, fixtures, and cutting components.

This flat stock is appropriate for both job shop and production tool room environments. It is commonly used to fabricate punches, dies, gauges, forming tools, and other precision components that require hardness after heat treatment. The 18-inch length makes it practical for a wide range of small-to-medium tool applications without significant material waste. A2 air-hardening steel is a standard choice where moderate toughness and good wear resistance are required after heat treatment.

Key Features

• AISI A2 air-hardening tool steel for dimensional stability during heat treatment
• Supplied annealed for easy machining prior to hardening
• Thickness tolerance of +0.010 to +0.015 inches for consistent stock sizing
• Width tolerance of +0.010 to +0.015 inches
• Length tolerance of +0.25 inches
• Square tolerance of +0.010 to +0.015 inches

Compatibility

Designed as a standard AISI A2 air-hardening tool steel flat bar suitable for general toolmaking, die making, and precision machining applications where A2-grade stock is specified.

Installation Notes

Machining and grinding should be performed in the annealed state before heat treatment. Heat treating A2 tool steel requires controlled atmosphere or vacuum furnace equipment and should be performed by a qualified heat treater following AISI A2 hardening and tempering guidelines. Always use appropriate personal protective equipment when cutting, grinding, or handling tool steel stock. Consult applicable shop safety and material handling standards before processing.