Starrett 54570 A2 Tool Steel Flat Stock 3/16x2x36 in

Product Description

The STARRETT 54570 is an A2 air-hardening tool steel flat stock bar used in toolmaking, die work, punch fabrication, and precision machining applications. Measuring 3/16 inches thick, 2 inches wide, and 36 inches long, this flat stock is ground to tight dimensional tolerances, including a thickness tolerance of plus or minus 0.001 inches and a width tolerance of plus 0.000 to 0.005 inches. The length tolerance is plus 0.25 inches. A2 tool steel offers good wear resistance, dimensional stability during heat treatment, and moderate toughness, making it a common choice for cold-work tooling. This material is typically cut, machined, and heat treated by tool and die makers or precision machinists.

This flat stock suits shop environments where ground, close-tolerance tool steel stock is required for fabricating blanks, fixtures, gauges, or cutting tools. The A2 air-hardening designation means it reaches full hardness through still-air quench, reducing distortion risk during heat treat compared to oil-hardening grades. It is appropriate for both one-off toolroom applications and short-run production of tooling components.

Key Features

• A2 air-hardening tool steel for reduced distortion during heat treatment
• Thickness tolerance of plus or minus 0.001 inches for close-fit tooling applications
• Width tolerance of plus 0.000 to 0.005 inches
• Squareness held to 0.003 inches per inch on all edges
• Ground flat stock format ready for layout, machining, or heat treating
• 36-inch length provides full bar stock for cutting multiple blanks

Compatibility

Designed as a standard A2 air-hardening tool steel flat stock suitable for cold-work die and tooling fabrication applications requiring ground, close-tolerance steel bar in 3/16 inches by 2 inches cross-section.

Installation Notes

Cutting and machining of tool steel flat stock should be performed with tooling rated for hardened or semi-hardened steel; stock is typically supplied in the annealed condition and should be handled accordingly. Heat treatment to working hardness requires a controlled atmosphere or appropriate protective measures to prevent decarburization and should be performed by qualified personnel following established procedures for AISI A2 tool steel. Proper eye protection and secure workholding are required during sawing, grinding, or milling operations.