Starrett 54540 O1 Tool Steel Flat Stock 2x3x36 in

Product Description

The STARRETT 54540 is an O1 oil-hardening tool steel flat stock bar used in precision toolmaking, die making, and machining applications. Measuring 2 inches thick, 3 inches wide, and 36 inches long, this flat stock is manufactured to tight dimensional tolerances, making it suitable for applications where accurate stock removal and final grinding are required. The material specification is AISI Type O1 Oil Hardening tool steel, a widely used cold-work grade known for its machinability in the annealed condition and its ability to achieve high hardness after oil quench heat treatment. At 61.2 pounds per bar, this is a substantial piece of stock suited for heavy tooling work.

This flat stock is intended for machine shops, tool and die shops, and industrial maintenance operations that require a reliable, pre-dimensioned bar of O1 tool steel. Typical applications include fabrication of punches, dies, gauges, jigs, fixtures, and cutting tools. It is supplied in the annealed condition, ready for machining prior to heat treatment. Licensed machinists, tool and die makers, and industrial maintenance technicians are the primary users of this material.

Key Features

• AISI Type O1 Oil Hardening tool steel — well-suited for dies, gauges, and precision tooling
• Tight thickness tolerance of plus or minus 0.001 inches for consistent stock removal
• Width tolerance of 0 to minus 0.005 inches for predictable fit in tooling layouts
• Length tolerance of plus 0.015 inches
• Edge squareness held to 0.003 inches per inch on all edges
• Supplied in annealed condition, ready for machining and subsequent heat treatment

Compatibility

Designed as a standard O1 oil-hardening tool steel flat stock suitable for general toolmaking, die making, and precision machining applications requiring AISI Type O1 material specification.

Installation Notes

Handling and machining of tool steel flat stock should be performed by qualified machinists or tool and die makers using appropriate metalworking equipment. Material should be machined in the annealed condition prior to heat treatment. Follow established shop safety practices when cutting, grinding, or drilling. Heat treatment processes including oil quenching should be performed by qualified personnel following applicable metallurgical procedures for O1 tool steel.