Starrett 54790 A2 Tool Steel Flat Stock 1x3x18 in

Product Description

The STARRETT 54790 is an A2 air-hardening tool steel flat stock bar intended for toolmakers, machinists, and die makers who require tight-tolerance raw stock for cutting tools, punches, dies, and precision fixtures. Measuring 1 inch thick by 3 inches wide by 18 inches long and weighing 15.12 pounds, this bar is produced to AISI A2 specification, which delivers excellent dimensional stability during heat treatment and strong wear resistance after hardening. Thickness tolerance is held to plus or minus 0.001 inch, squareness tolerance to plus or minus 0.001 inch, making it suitable for applications where pre-machined accuracy matters before hardening.

A2 tool steel flat stock is a standard raw material in precision tool and die shops, mold shops, and maintenance machining environments. It is well suited for fabricating blanking dies, form dies, gauges, and wear plates where air-hardening capability reduces distortion compared to oil-hardening grades. This bar ships at a nominal 1 inch by 3 inch by 18 inch size, giving machinists usable stock for medium-run tool applications in both job shop and production settings.

Key Features

• AISI A2 air-hardening tool steel for reduced distortion during heat treatment
• Thickness tolerance of plus or minus 0.001 inch for consistent pre-machine stock accuracy
• Width tolerance of plus 0.000 to 0.005 inch
• Length tolerance of plus 0.250 inch
• Squareness tolerance of plus or minus 0.001 inch
• Ready-to-machine flat stock at 1 inch thick by 3 inches wide by 18 inches long

Compatibility

Designed as a standard AISI A2 air-hardening tool steel flat bar suitable for use in precision tool and die fabrication, gauging, and wear-plate applications where air-hardening tool steel stock is specified.

Installation Notes

Machining and heat treatment of A2 tool steel should be performed by qualified toolmakers or machinists following recognized shop practices. Always wear appropriate PPE when cutting, grinding, or handling tool steel stock. Heat treatment, including hardening and tempering, should follow the material manufacturer's published cycle recommendations and be performed in properly controlled furnace equipment. Secure workpieces firmly before any machining operation to maintain the dimensional tolerances built into the bar.