Starrett 54532 O1 Tool Steel Flat Stock 1-1/2x3x36 in

Product Description

The STARRETT 54532 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die work, and precision machining applications. Manufactured to AISI Type O1 material specification, this flat stock measures 1.5 inches thick, 3 inches wide, and 36 inches long and weighs 45.9 pounds. O1 tool steel is a tungsten-alloyed oil-hardening grade known for its machinability in the annealed state and its ability to hold a fine edge after heat treatment. Thickness tolerance is held to plus or minus 0.001 inches, making this stock suitable for applications requiring tight dimensional control before finish grinding or hardening.

This flat stock is intended for tool and die shops, machine shops, and industrial fabrication environments where raw tool steel stock is cut, machined, and heat-treated into finished components. Typical applications include punches, dies, gauges, fixtures, and custom tooling. The 36-inch length provides a practical starting blank for multiple parts from a single bar. This material is supplied in the annealed condition and requires oil-quench heat treatment to achieve working hardness.

Key Features

• AISI Type O1 oil-hardening tool steel for excellent machinability before hardening
• Thickness tolerance of plus or minus 0.001 inches for precise stock allowance planning
• Length tolerance of plus 0.015 inches, zero minus for predictable cut yields
• Width tolerance of 0.000 to minus 0.005 inches
• Edge squareness held to 0.003 inches per inch on all edges
• Supplied in annealed condition, ready for machining prior to heat treatment

Compatibility

Designed as a standard AISI O1 oil-hardening tool steel flat stock for use in general toolmaking, die making, and precision machining applications requiring an oil-quench hardenable material.

Installation Notes

Cutting and machining of tool steel flat stock should be performed with appropriate metalworking equipment by qualified machinists or tool and die makers. Use proper workholding and cutting fluid when machining to maintain dimensional accuracy. Heat treatment to harden O1 tool steel requires oil quenching and must be performed according to established metallurgical procedures by qualified personnel. Always wear appropriate PPE when handling large steel bar stock of this weight.