Starrett 54627 A2 Tool Steel Flat Stock 0.25x4x18 in

Product Description

The STARRETT 54627 is an A2 air-hardening tool steel flat stock bar used in toolmaking, die work, and precision machining applications. Measuring 0.25 inches thick, 4 inches wide, and 18 inches long, this flat stock is held to tight dimensional tolerances: plus or minus 0.001 inches on thickness, plus or minus 0.001 inches on squareness, plus 0.000 to 0.005 inches on width, and plus 0.250 inches on length. A2 tool steel offers good wear resistance and dimensional stability through the air-hardening process, making it a reliable choice for fabricating punches, dies, gauges, and similar tooling components. Machinists, tool and die makers, and precision fabricators work with this material regularly.

This flat stock is suited for tool and die shops, maintenance machining operations, and prototype fabrication environments. A2 air-hardening tool steel is commonly specified when oil-hardening grades would introduce distortion risk or when a balance of toughness and wear resistance is required. The 0.25-inch by 4-inch by 18-inch blank provides enough material for medium-sized die plates, fixture components, or custom cutting tools that require finishing and heat treatment on-site. The stock ships in annealed condition, ready for machining before hardening.

Key Features

• A2 air-hardening tool steel per AISI specification — offers low distortion during heat treatment
• Thickness tolerance of plus or minus 0.001 inches supports precise material removal planning
• Width tolerance of plus 0.000 to 0.005 inches ensures consistent blank sizing
• Squareness tolerance of plus or minus 0.001 inches reduces setup time on the mill or surface grinder
• Annealed flat stock format ready for machining prior to hardening and tempering
• Weighs 4.91 pounds — manageable single-piece blank for bench or VMC work

Compatibility

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

Installation Notes

Machining of A2 tool steel flat stock should be performed in the annealed condition before heat treatment. Hardening, quenching, and tempering of tool steel should be carried out by a qualified heat treater or tool and die professional following established metallurgical procedures for AISI A2. Secure the workpiece properly in a milling vise or fixture before cutting operations to maintain dimensional accuracy. Always use appropriate personal protective equipment when sawing, grinding, or machining tool steel stock.