Starrett 57187 A2 Tool Steel Flat Stock 3/8x1.5x18 in

Product Description

The STARRETT 57187 is an A2 air-hardening tool steel flat stock bar used in toolmaking, die making, and precision machining applications. Manufactured to AISI A2 specification, this flat stock measures 0.375 inches thick, 1.5 inches wide, and 18 inches long, with a weight of 2.87 pounds. A2 tool steel is known for its dimensional stability during heat treatment and its ability to harden through air quenching, making it a reliable choice for punches, dies, gauges, and similar tooling components. Machinists, tool and die makers, and industrial maintenance professionals work with this material in job shops and production facilities.

This flat stock is suited for fabricating custom tooling components in both light industrial and heavy manufacturing environments. The annealed condition of A2 flat stock allows for conventional machining prior to heat treatment. It is appropriate for applications where moderate toughness and good wear resistance are required after hardening. This bar length works well for single-piece tooling blanks or can be cut to yield multiple smaller components depending on the application.

Key Features

• AISI A2 air-hardening tool steel — stable dimensions during heat treat cycle
• Thickness: 0.375 inches with tolerance of +0.010 to +0.015 inches
• Width: 1.5 inches with tolerance of +0.010 to +0.015 inches
• Length: 18 inches with tolerance of +0.25 inches
• Square tolerance: +0.010 to +0.015 inches
• Weight: 2.87 pounds per piece

Compatibility

Designed as a standard-profile A2 tool steel flat bar suitable for use in toolmaking, die making, fixture building, and general precision machining applications requiring air-hardening tool steel stock.

Installation Notes

Cutting, grinding, and machining of tool steel flat stock should be performed with equipment rated for hard ferrous materials. Heat treatment of A2 tool steel should be carried out by a qualified heat treater following established metallurgical procedures for austenitizing temperature and air quench cycles. Always allow the bar to reach ambient temperature before taking critical measurements. Wear appropriate PPE when cutting or grinding tool steel.