Starrett 57512 A2 Tool Steel Flat Stock 0.125x12x18 in

Product Description

The STARRETT 57512 is an A2 air-hardening tool steel flat stock blank used in toolmaking, die making, and precision machining applications. Measuring 0.125 inches thick, 12 inches wide, and 18 inches long, this flat stock is produced to tight dimensional tolerances: plus or minus 0.001 inches on thickness and squareness, plus 0.000 to 0.015 inches on width, and plus 0.250 inches on length. A2 tool steel offers good wear resistance, dimensional stability during heat treatment, and machinability in the annealed state. Machinists, tool-and-die makers, and industrial maintenance technicians work with this material to fabricate punches, dies, gauges, and custom tooling components.

This flat stock is suited for job shops, tool rooms, and maintenance departments requiring a readily workable blank that can be machined to final dimensions before hardening. The air-hardening characteristic of A2 minimizes distortion during the hardening cycle compared to oil-hardening grades, making it a common choice when close dimensional control of the finished part is required. The 12-inch by 18-inch face provides adequate material for a wide range of tooling layouts, and the stock thickness of 0.125 inches is appropriate for thin die plates, shim stock, and flat tooling components.

Key Features

• A2 air-hardening tool steel for reduced distortion during heat treatment
• Thickness of 0.125 inches held to plus or minus 0.001 inch tolerance
• Width of 12 inches held to plus 0.000 to 0.015 inch tolerance
• Length of 18 inches with plus 0.250 inch length tolerance
• Squareness tolerance of plus or minus 0.001 inch
• Supplied in annealed condition for machining prior to hardening

Compatibility

Designed as a standard A2 tool steel flat stock blank for use in tool-and-die, punch press, and precision machining applications requiring air-hardening material per AISI A2 specification.

Installation Notes

Machining and heat treatment of tool steel should be performed by qualified tool-and-die makers or machinists familiar with A2 steel processing. Rough machine to near-net shape before hardening to take advantage of A2 dimensional stability during the air-quench cycle. All grinding, EDM, and finishing operations should follow established shop practices and applicable safety standards for metal cutting and heat treating. Allow stock to reach ambient temperature before taking final measurements.