Starrett 57533 A2 Tool Steel Flat Stock 3/8x3/4x18 in

Product Description

The STARRETT 57533 is an A2 air-hardening tool steel flat stock bar used in toolmaking, die making, and precision machining applications. Measuring 0.375 inches thick, 0.75 inches wide, and 18 inches long, this flat stock is ground to close tolerances on all faces, making it ready for layout, machining, or heat treatment. The AISI A2 designation indicates an air-hardening, medium-alloy cold-work tool steel with good dimensional stability during hardening. This material is a common choice for punches, dies, gauges, and other tooling components where tight dimensional control is required before and after heat treat. Weighing 1.44 pounds, it ships as a single piece.

A2 tool steel flat stock is used in job shops, tool and die shops, and maintenance departments across manufacturing industries. It is appropriate for both roughing and finish grinding to final dimensions. The 18-inch length provides enough material for a range of medium-size tooling projects without the waste of longer bar stock. Machinists and tool and die makers typically work this material in the annealed condition before sending it out for heat treatment and subsequent finish grinding.

Key Features

• AISI A2 air-hardening cold-work tool steel for good dimensional stability during heat treatment
• Thickness: 0.375 inches with a tolerance of plus or minus 0.001 inches
• Width: 0.75 inches with a tolerance of plus 0.000 to 0.005 inches
• Length: 18 inches with a tolerance of plus 0.250 inches
• Square tolerance of plus or minus 0.001 inches for consistent right-angle geometry
• Ground flat stock finish suitable for direct use in tooling and die applications

Compatibility

Designed as a standard A2 air-hardening tool steel flat stock bar suitable for general toolmaking, die making, punch fabrication, and gauge construction where AISI A2 material specification is required.

Installation Notes

Machining and grinding of A2 tool steel should be performed by qualified machinists or tool and die makers using appropriate cutting fluids and grinding wheels rated for tool steel. Heat treatment, including hardening and tempering, should be carried out by a qualified heat treater following the material manufacturer recommendations for A2 steel. Always inspect dimensions after heat treatment, as some movement may occur even with air-hardening grades. Proper personal protective equipment including eye protection and cut-resistant gloves should be used when handling and machining flat stock.