Starrett 57515 A2 Tool Steel Flat Stock 5/32x1-3/4x18 in

Product Description

The STARRETT 57515 is an A2 air-hardening tool steel flat stock bar used in toolmaking, fixture building, die work, and precision machining applications. Measuring 5/32 inches thick by 1-3/4 inches wide by 18 inches long, this flat stock is ground to close tolerances on all faces. The AISI A2 tool steel composition offers good dimensional stability during heat treatment and strong wear resistance after hardening, making it a reliable choice for shops that need consistent, ready-to-machine stock. Machining contractors, tool and die makers, and industrial maintenance teams are the primary users of this material.

This flat stock is suited for fabricating punches, dies, gauges, fixtures, and cutting tools in both job shop and production environments. The 18-inch length provides a practical working blank for most bench and mill operations. Because A2 air-hardens rather than requiring a quench bath, distortion during heat treat is minimized, which is important when maintaining part geometry on thin cross-sections like the 5/32-inch thickness of this bar. Shops working to tight finished-part tolerances often prefer A2 for exactly this reason.

Key Features

• AISI A2 air-hardening tool steel for reduced distortion during heat treatment
• Thickness tolerance of plus or minus 0.001 inches for consistent stock removal calculations
• Width tolerance of plus 0.000 to plus 0.005 inches
• Length tolerance of plus 0.250 inches
• Square tolerance of plus or minus 0.001 inches ensures flat, parallel faces
• Ships as a single 18-inch bar ready for layout, machining, and heat treat

Compatibility

Designed as a general-purpose A2 tool steel flat stock blank compatible with standard toolroom milling, grinding, EDM, and bench operations wherever AISI A2 material specification is required.

Installation Notes

Cutting, grinding, and machining of tool steel flat stock is typically performed by machinists or tool and die makers using conventional or CNC milling equipment. Eye protection and appropriate chip guards are required when machining. Heat treatment to harden A2 tool steel should be performed by a qualified heat treater following the material manufacturer's recommended austenitizing and tempering parameters. Allow the bar to fully cool and stabilize before final grinding to finished dimension.