Starrett 54509 O1 Tool Steel Flat Stock 1x5x36 in

Product Description

The STARRETT 54509 is an O1 oil-hardening tool steel flat stock bar measuring 1 inch thick, 5 inches wide, and 36 inches long. O1 tool steel is a general-purpose, oil-quench grade known for its good machinability in the annealed state and its ability to hold a sharp edge after hardening. This flat stock ships in the soft, annealed condition and is sized for use by tool and die makers, machinists, and metalworking shops that need reliable dimensional stock for custom tooling, jigs, fixtures, gauges, and cutting tools. At 51 pounds per piece, this is a substantial bar suited for heavy-duty tooling applications.

This flat bar is appropriate for job shops, tool rooms, and industrial facilities requiring precision-ground tool steel stock. It is commonly used to fabricate punches, dies, blanking tools, forming tools, and gauging components. The 36-inch length allows multiple blanks to be cut from a single piece. The annealed condition makes it workable with conventional machining equipment before hardening and tempering to the desired final hardness.

Key Features

• AISI Type O1 oil-hardening tool steel for predictable heat-treat response
• Thickness tolerance of plus or minus 0.001 inches for tight dimensional control
• Length tolerance of plus 0.015 inches, minus 0 inches
• Width tolerance of 0.000 to minus 0.005 inches
• Squareness: edge all 0.003 inches per inch
• Ships annealed and ready for machining prior to hardening

Compatibility

Designed as a standard O1 oil-hardening tool steel flat stock for general tool room and metalworking applications requiring AISI Type O1 material specification.

Installation Notes

Cutting, grinding, and machining of tool steel flat stock should be performed by qualified machinists using appropriate tooling and coolant. Heat treatment, including hardening and tempering, should follow established metallurgical procedures for AISI O1 tool steel and must be performed with proper equipment to achieve target hardness. Always use appropriate personal protective equipment when cutting or grinding steel bar stock. Consult material safety data sheets for handling and disposal guidance.