Starrett 57499 A2 Tool Steel Flat Stock 3/32x3/4x18 in

Product Description

The STARRETT 57499 is an A2 air-hardening tool steel flat stock bar intended for toolmakers, die makers, and machinists who need a reliable, dimensionally consistent raw material for fabricating punches, dies, gauges, and custom tooling. Cut to 18 inches in length with a 3/32-inch thickness and 3/4-inch width, this flat stock ships ready for layout and machining. Tolerances are held tight across all three axes: thickness and square tolerance are both held to plus or minus 0.001 inches, width tolerance runs plus 0.000 to 0.005 inches, and length tolerance is plus 0.250 inches. A2 tool steel offers excellent dimensional stability during heat treatment, making it a standard choice where warping must be minimized.

This flat stock is suited to tool and die shops, precision machining operations, and maintenance departments that fabricate their own tooling components. Typical applications include blanking dies, trim dies, form punches, stripper plates, and custom fixture components. The 18-inch length provides sufficient material for most single-piece tooling applications without requiring initial cutoff. A2 air-hardening grade is appropriate where oil-hardening grades introduce too much distortion risk on thin cross-sections like 3/32-inch stock.

Key Features

• A2 air-hardening tool steel for minimal distortion during heat treat
• Thickness and square tolerance held to plus or minus 0.001 inches for precise fitment
• Width tolerance of plus 0.000 to 0.005 inches allows predictable finish grinding
• 3/32-inch thickness suits thin punch and die sections
• 18-inch length ready for direct layout and machining without preliminary sawing in most applications

Compatibility

Designed as a general-purpose A2 tool steel flat stock suitable for fabrication of dies, punches, gauges, and tooling components requiring air-hardening grade material per AISI A2 specification.

Installation Notes

Machining and grinding should be performed by qualified toolmakers or machinists familiar with tool steel handling. Heat treatment should be carried out by a qualified heat treater following AISI A2 recommended austenitizing and air-quench procedures. Secure workpieces properly before machining to prevent movement on thin stock. Eye protection and appropriate guarding are required when cutting or grinding tool steel.