Starrett 57350 A2 Tool Steel Air-hardening Flat Stock

Product Description

The STARRETT 57350 is an A2 air-hardening tool steel flat stock bar intended for use in tool and die fabrication, jig and fixture building, gauges, and precision machining applications. It measures 0.5 inches thick, 1.75 inches wide, and 36 inches long, and ships at approximately 10.26 pounds. A2 tool steel offers good wear resistance, moderate toughness, and predictable dimensional stability through the air-hardening process, making it a reliable choice for shops that need consistent, close-tolerance stock. Thickness tolerance is held to plus or minus 0.001 inches, and squareness is maintained to 0.003 inches per inch on all edges.

This flat stock is suited for tool rooms, machine shops, and production environments requiring tight-tolerance raw material. It is appropriate for fabricating punches, dies, cutting tools, wear plates, and precision fixtures. The air-hardening characteristic of A2 allows for reduced distortion during heat treatment compared to oil-hardening grades, which is useful when final dimensions must be held close after hardening. Machinists, tool and die makers, and precision fabricators typically work with this material in both pre-hardened and annealed conditions.

Key Features

• AISI A2 air-hardening tool steel for reduced distortion during heat treatment
• Thickness tolerance of plus or minus 0.001 inches for precision fitment
• 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
• 36-inch length provides standard working stock for most tool room applications

Compatibility

Designed as a standard AISI A2 air-hardening tool steel flat bar suitable for general tool room and precision machining applications requiring close-tolerance raw stock.

Installation Notes

Cutting, grinding, and machining of tool steel should be performed with appropriate tooling rated for hardened or semi-hardened steel stock. Follow standard shop safety practices including eye and hand protection when sawing or grinding. Heat treatment should be performed by qualified personnel following established A2 austenitizing and air-quench procedures. Consult applicable shop standards and material data sheets before hardening to verify final dimensional allowances.