Starrett 57211 A2 Tool Steel Flat Stock 5/8 X 3 X 18 in

Product Description

The STARRETT 57211 is an A2 air-hardening tool steel flat stock bar used in toolmaking, die work, and precision machining applications. Manufactured to AISI A2 material specification, this flat stock measures 5/8 inch thick, 3 inches wide, and 18 inches long. A2 tool steel offers excellent dimensional stability during heat treatment and good wear resistance after hardening, making it a reliable choice for punches, dies, gauges, and similar toolroom components. Thickness, width, and squareness tolerances are held to plus 0.010 to 0.015 inches, with a length tolerance of plus 0.25 inches. Machinists, tool and die makers, and metalworking professionals work with this stock in job shop and industrial toolroom settings.

This flat stock is well suited for fabricating cutting tools, blanking dies, forming tools, and precision fixtures where air-hardening steel is specified. The oversized tolerance on all dimensions allows material for final grinding to finished size after rough machining. At 9.56 pounds per piece, the 5/8 x 3 x 18 inch bar provides enough material for medium-sized tooling components without excessive stock removal. It is commonly ordered one piece at a time for custom toolroom jobs.

Key Features

• AISI A2 air-hardening tool steel for stable, low-distortion heat treatment
• Dimensions: 5/8 inch thick x 3 inches wide x 18 inches long
• Thickness, width, and squareness tolerances of plus 0.010 to 0.015 inches allow finish grinding to size
• Length tolerance of plus 0.25 inches provides facing stock on both ends
• Suitable for dies, punches, gauges, and precision toolroom components
• Single-piece minimum order quantity supports low-volume toolroom use

Compatibility

Designed as an OEM-style flat stock bar for use in general toolmaking, die making, and precision metalworking applications requiring AISI A2 air-hardening tool steel.

Installation Notes

A2 tool steel flat stock is worked by qualified machinists and tool and die makers using conventional milling, turning, grinding, and EDM equipment. Always perform rough machining before heat treatment, then finish grind to final dimensions after hardening and tempering. Follow the material supplier heat treatment guidelines for A2 steel regarding austenitizing temperature, quench method, and temper cycle. Wear appropriate PPE when cutting or grinding tool steel.