Starrett 57189 A2 Tool Steel Flat Stock 3/8x2-1/2x18 in

Product Description

The STARRETT 57189 is an A2 air-hardening tool steel flat stock bar measuring 3/8 inch thick, 2-1/2 inches wide, and 18 inches long. A2 tool steel is a cold-work, air-hardening alloy known for its dimensional stability during heat treatment and its good balance of toughness and wear resistance. This flat stock is used as raw material for fabricating dies, punches, gauges, blades, and other precision tooling components. Machinists, tool-and-die makers, and metalworking shops work with this material in its annealed state before final heat treatment to working hardness. Weight is approximately 4.78 pounds per piece.

This flat stock is suited for tool room and production environments where controlled heat treatment and tight dimensional tolerances are required. Typical applications include die-making, punch fabrication, jig construction, and custom gauge blanks. The 18-inch length provides a practical working blank for most bench and machine tool operations. It ships in the annealed, machinable condition and is intended for post-machining heat treatment by qualified personnel.

Key Features

• AISI A2 air-hardening tool steel — dimensionally stable during heat treat, reduced distortion vs. oil-hardening grades
• Thickness: 3/8 inch with a tolerance of +0.010 to 0.015 inches
• Width: 2-1/2 inches with a tolerance of +0.010 to 0.015 inches
• Length: 18 inches with a tolerance of +0.25 inches
• Square tolerance: +0.010 to 0.015 inches
• Supplied in annealed condition, ready for machining prior to hardening

Compatibility

Designed as a general-purpose A2 tool steel flat stock blank for use in tool room, die shop, and precision metalworking applications requiring an air-hardening cold-work steel.

Installation Notes

Machining and heat treatment of A2 tool steel should be performed by qualified machinists or tool-and-die makers familiar with cold-work tool steel processing. Material should be rough-machined, then finish-machined after normalizing if required, and hardened per the applicable heat treat specification for AISI A2. Always allow proper soak time at hardening temperature and air-cool in still air or with forced air as required by the heat treat procedure. Follow applicable shop safety practices for handling and storing tool steel stock.