Starrett 57335 A2 Tool Steel Flat Stock 0.25x0.25x36 in

Product Description

The STARRETT 57335 is an A2 air-hardening tool steel flat stock bar intended for toolmakers, machinists, and die makers who require tight-tolerance stock material for custom tooling, punches, dies, and fixture components. Measuring 0.25 inches thick, 0.25 inches wide, and 36 inches long, this piece ships as a single bar weighing 0.73 pounds. The A2 designation indicates an air-hardening cold-work tool steel alloy that offers good dimensional stability during heat treatment and solid wear resistance after hardening. Thickness and squareness tolerances are held to plus or minus 0.001 inches, making this stock suitable for applications where precise pre-hardened geometry matters before final grinding and finishing.

This flat stock is used in tool rooms and machine shops for fabricating custom cutting tools, gages, jigs, and fixture details. A2 tool steel is a common choice for cold-work applications such as blanking dies, forming dies, and trim tools operating at moderate production volumes. The 36-inch length allows for multiple parts to be cut from a single bar. The material arrives in the annealed condition and must be hardened and tempered by the end user or a commercial heat treater before use in a cutting or forming application.

Key Features

• AISI A2 air-hardening cold-work tool steel for good dimensional stability during heat treatment
• Thickness tolerance of plus or minus 0.001 inches for consistent pre-grind stock allowance
• Width tolerance of plus 0.000 to plus 0.005 inches
• Length tolerance of plus 0.25 inches
• Squareness held to all edges at 0.003 per inch
• Single bar quantity, 36 inches long, ready to cut to length

Compatibility

Designed as a standard-dimension A2 tool steel flat bar suitable for general tool room and machine shop fabrication applications requiring air-hardening cold-work steel stock.

Installation Notes

Cutting and machining of tool steel flat stock should be performed with appropriate metalworking equipment by qualified machinists or toolmakers. Material is supplied in the annealed condition and requires professional heat treatment to achieve working hardness before use in tooling applications. Always follow applicable shop safety practices when sawing, milling, or grinding tool steel, including use of proper personal protective equipment and machine guarding.