Starrett 54647 A2 Tool Steel Flat Stock 3/8x2.5x36 in

Product Description

The STARRETT 54647 is an A2 air-hardening tool steel flat stock bar intended for toolmakers, die makers, and machinists who need a precision-ground blank ready for heat treatment and finish machining. It measures 0.375 inches thick, 2.5 inches wide, and 36 inches long, and weighs approximately 10.99 pounds. A2 tool steel offers good wear resistance combined with moderate toughness, making it a common choice for punches, dies, gauges, and cutting tools that will be air-quenched after hardening. Thickness and squareness tolerances are held to plus or minus 0.001 inches, giving the technician a reliable starting dimension.

This flat stock is suited for job shops, tool and die operations, and maintenance departments that fabricate custom tooling in-house. The 36-inch bar length provides enough material to cut multiple blanks for punches, blades, or fixtures from a single piece. Width tolerance is held to plus 0.000 to 0.005 inches, and length is supplied to a plus 0.25-inch tolerance, consistent with standard stock allowances for finish grinding. Squareness is controlled to 0.003 inches per inch on all edges. A licensed machinist or toolmaker typically sources and machines this material; no special trade license is required for purchase.

Key Features

• AISI A2 air-hardening tool steel for good dimensional stability during heat treatment
• Thickness held to plus or minus 0.001 inches for consistent starting stock
• Width tolerance of plus 0.000 to 0.005 inches for predictable finish-grind allowance
• Squareness controlled to 0.003 inches per inch on all edges
• 36-inch bar length allows multiple blanks from a single piece
• Weighs approximately 10.99 pounds — suitable for benchtop handling

Compatibility

Designed as a standard A2 air-hardening tool steel flat stock for general toolmaking, die making, gauge fabrication, and similar machined-component applications requiring air-quench heat treatment.

Installation Notes

Cutting and machining should be performed with tooling rated for hardened or semi-hardened tool steel stock. Heat treatment must follow established A2 tool steel austenitizing and air-quench procedures — do not substitute oil or water quench media. Grind or machine to final dimensions before hardening whenever possible to minimize post-heat-treatment stock removal. Personal protective equipment including eye protection and appropriate gloves should be used when cutting or grinding.