Starrett 54667 A2 Tool Steel Flat Stock 0.5x4x36 in

Product Description

The STARRETT 54667 is an A2 air-hardening tool steel flat stock bar intended for toolmakers, die makers, and machinists who need a dimensionally consistent, weldable blank ready for custom fabrication or heat treatment. It measures 0.5 inches thick, 4 inches wide, and 36 inches long, with a thickness tolerance of plus or minus 0.001 inches and a width tolerance of plus 0.000 to 0.005 inches. The bar ships in an annealed condition, making it machinable before hardening. A2 tool steel offers a balanced combination of wear resistance and toughness after heat treatment, making it a standard choice for punches, dies, gauges, and precision tooling components.

This flat stock is suited for industrial and job-shop environments where close-tolerance blanks are required for secondary operations such as milling, grinding, EDM, and hardening. Typical applications include blanchard-ground die plates, wear plates, cutting tools, and form punches. The 36-inch length supports full-length tooling layouts without the need for additional stock splicing. This material is handled primarily by tool and die makers, machinists, and metalworking professionals in manufacturing and maintenance settings.

Key Features

• A2 air-hardening tool steel — good dimensional stability during heat treatment with reduced distortion compared to oil-hardening grades
• Thickness tolerance of plus or minus 0.001 inches for consistent stock removal calculations
• Width tolerance of plus 0.000 to 0.005 inches
• Length tolerance of plus 0.25 inches
• Squareness tolerance of plus or minus 0.001 inches; edge squareness held to 0.003 inches per inch
• Supplied in annealed condition — ready for machining prior to hardening cycle

Compatibility

Designed as a standard-profile A2 tool steel flat stock suitable for use in tool and die, punch press, gauging, and precision machining applications requiring air-hardening material per AISI A2 specification.

Installation Notes

Cutting, grinding, and machining of tool steel flat stock should be performed using appropriate metalworking equipment with coolant to prevent heat buildup in the workpiece. Heat treatment of A2 steel should be carried out by a qualified heat treater following established austenitizing, quench, and temper cycles for AISI A2; do not attempt air hardening without proper temperature-controlled equipment. Always wear appropriate PPE including eye protection and cut-resistant gloves when handling and cutting flat stock. Verify final dimensions after stress relief or heat treatment, as some movement is possible.