Starrett 54637 A2 Tool Steel Flat Stock 5/16x3x36 in

Product Description

The STARRETT 54637 is an A2 air-hardening tool steel flat stock bar designed for toolmakers, die makers, machinists, and maintenance professionals who require tight-tolerance stock for fabricating punches, dies, jigs, fixtures, and tooling components. This flat stock measures 5/16 inches thick, 3 inches wide, and 36 inches long. It is manufactured to AISI A2 tool steel specification, which offers excellent dimensional stability during heat treatment, good wear resistance, and moderate toughness. Thickness tolerance is held to plus or minus 0.001 inches, making it suitable for precision tooling applications where ground stock is not required but close control is.

A2 air-hardening flat stock is commonly used in job shops, tool rooms, and manufacturing facilities for producing blanks and components that will be machined, heat treated, and finished in-house. The 3-inch width and 36-inch length make this a versatile bar for medium-sized tooling blanks. AISI A2 is a preferred general-purpose tool steel where D2 may be too brittle and O1 lacks the dimensional stability needed during air-hardening cycles. Licensed machinists and tool and die makers are the primary users of this material.

Key Features

• AISI A2 air-hardening tool steel for dimensional stability during heat treat
• Thickness tolerance of plus or minus 0.001 inches for close-tolerance blanks
• Width tolerance of plus 0.000 to 0.005 inches
• Length tolerance of plus 0.25 inches
• Squareness held to 0.003 inches per inch on all edges
• Square tolerance of plus or minus 0.001 inches

Compatibility

Designed as a standard AISI A2 air-hardening tool steel flat stock for use in general tool room, die making, and precision machining applications requiring close-tolerance flat bar stock.

Installation Notes

Cutting, grinding, and machining of tool steel flat stock should be performed by qualified machinists using appropriate cutting fluids and tooling rated for hardened or semi-hardened steel. Heat treatment of A2 tool steel should follow the material manufacturer's guidelines and be performed by personnel familiar with air-hardening steel protocols. Always secure workpieces properly before machining to prevent movement and injury. Allow material to reach ambient temperature before taking final dimensional measurements.