Starrett 54231 O1 Tool Steel Flat Stock 1-1/4x1-1/2x18 in

Product Description

The STARRETT 54231 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die-making, and precision machining applications. Manufactured to AISI Type O1 material specification, this flat stock measures 1-1/4 inches thick, 1-1/2 inches wide, and 18 inches long, and weighs 9.56 pounds. Thickness and squareness tolerances are held to plus or minus 0.001 inches, making it suitable for applications where dimensional consistency is critical before hardening. Machinists, tool-and-die makers, and industrial maintenance trades work with this material to fabricate punches, dies, gauges, and similar tooling components that will be oil-quench hardened after machining.

O1 tool steel flat stock is commonly used in job shop and production toolroom environments for fabricating custom cutting tools, form tools, and fixture components. The 18-inch length provides a practical working blank for a wide range of tooling layouts. The as-supplied annealed condition allows full machining prior to heat treatment. This stock is appropriate for both short-run prototype tooling and production die work where close dimensional control is required before final hardening and tempering.

Key Features

• AISI Type O1 oil-hardening tool steel material specification
• Thickness and squareness tolerance of plus or minus 0.001 inches for consistent pre-heat-treat dimensions
• Width tolerance of 0.000 to minus 0.005 inches
• Length tolerance of plus 0.250 inches, minus 0 inches
• Edge squareness held to 0.003 inches per inch on all edges
• Supplied in annealed condition, ready for machining prior to oil quench hardening

Compatibility

Designed as a standard O1 oil-hardening tool steel flat stock blank for use in toolroom, die-making, and precision machining applications requiring AISI Type O1 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. O1 tool steel must be properly annealed before machining and oil-quench hardened and tempered after final shaping — follow established heat treatment procedures for AISI O1. Wear appropriate PPE when cutting or grinding. Do not attempt to cold-bend or straighten hardened stock.