Starrett 54633 A2 Tool Steel Flat Stock 5/16x1-1/4x36in

Product Description

The STARRETT 54633 is an A2 air-hardening tool steel flat stock bar used in toolmaking, die work, and precision machining applications. Measuring 5/16 inches thick, 1-1/4 inches wide, and 36 inches long, this flat stock is ground to tight dimensional tolerances, making it suitable for fabricating punches, dies, gauges, and other precision tooling components. It weighs 4.58 pounds. A2 tool steel offers good wear resistance and dimensional stability during heat treatment, and the air-hardening characteristic reduces the risk of warping or distortion compared to oil-hardening grades. Machinists and tool-and-die makers select this stock for work that demands consistent geometry and reliable hardening response.

This flat stock is used in job shops, tool rooms, and industrial maintenance environments where custom tooling is fabricated in-house. Typical applications include cutting dies, form tools, fixture components, and wear plates. The 36-inch length provides sufficient stock for most bench-scale tooling projects and can be cut to length before or after hardening depending on application requirements. It is appropriate for both short-run production tooling and prototype work where dimensional accuracy is critical.

Key Features

• A2 air-hardening tool steel construction for dimensional stability during heat treat
• Thickness tolerance of plus or minus 0.001 inches for consistent stock removal in grinding operations
• Width tolerance of plus 0.000 to 0.005 inches
• Length tolerance of plus 0.25 inches
• Squareness tolerance of plus or minus 0.001 inches; edge squareness 0.003 per inch
• 36-inch bar length suitable for a wide range of tooling blanks

Compatibility

Designed as a standard A2 tool steel flat stock blank for use in general toolmaking, die fabrication, and precision machining applications where air-hardening cold-work tool steel is specified.

Installation Notes

Cutting and grinding of tool steel flat stock should be performed by a qualified machinist or tool-and-die maker using appropriate tooling and coolant. Heat treatment should follow the material specification for AISI A2 tool steel, including proper preheat, austenitizing, and air-quench procedures. Always allow the stock to cool fully before handling after hardening. Wear appropriate personal protective equipment when cutting or grinding.