Starrett 54155 O1 Tool Steel Flat Stock 1/2x3x18 in

Product Description

The STARRETT 54155 is an O1 oil-hardening tool steel flat stock blank used in toolmaking, die making, and precision machining applications. Measuring 0.5 inches thick, 3 inches wide, and 18 inches long, this flat stock is manufactured to tight dimensional tolerances, including a thickness tolerance of plus or minus 0.001 inches. The AISI Type O1 material designation indicates a low-alloy, oil-quench tool steel known for good machinability in the annealed state and consistent hardening response. This stock is handled and installed by tool and die makers, machinists, and maintenance professionals who require predictable material behavior through heat treatment.

O1 oil-hardening flat stock is used across job shops, maintenance repair operations, and production tool rooms for fabricating punches, dies, gauges, jigs, fixtures, and other precision tooling components. The 0.5 inch by 3 inch by 18 inch form factor suits applications where a thicker, wider blank is required before machining to net shape. Because the material is supplied in the annealed condition, it can be shaped, drilled, and ground prior to oil quenching and tempering to achieve the desired hardness. The 7.65-pound piece weight reflects the solid cross-section of this full-size flat stock blank.

Key Features

• AISI Type O1 oil-hardening tool steel for consistent heat-treat response
• Thickness tolerance of plus or minus 0.001 inches for close-tolerance work
• Width tolerance of 0.000 to minus 0.005 inches
• Length tolerance of plus 0.250 inches, minus 0 inches
• Squareness: edge squareness held to 0.003 inches per inch on all edges
• Supplied in annealed condition, ready for machining before hardening

Compatibility

Designed as a standard O1 oil-hardening tool steel flat stock blank suitable for general toolmaking, die making, and precision fixture fabrication where AISI Type O1 material is specified.

Installation Notes

Machining and grinding of O1 tool steel flat stock should be performed in the annealed state before heat treatment. Oil quenching and tempering operations should be carried out by qualified heat-treat personnel following established shop procedures and appropriate personal protective equipment protocols. Secure the workpiece properly during all machining operations to prevent movement. Consult applicable material safety data for handling and disposal of cutting fluids and heat-treat oils used with this material.