Starrett 54224 O1 Tool Steel Flat Stock 1x12x18 in

Product Description

The STARRETT 54224 is an O1 oil-hardening tool steel flat stock bar measuring 1 inch thick, 12 inches wide, and 18 inches long. O1 is an oil-hardening, cold-work tool steel known for its good machinability in the annealed state and its ability to hold a sharp edge after hardening. This flat stock is used by tool and die makers, machinists, and metalworking professionals as raw material for dies, punches, gauges, fixtures, and cutting tools. Thickness tolerance is held to plus or minus 0.001 inches, making this bar suitable for precision tool-making applications where tight dimensional control is required before hardening.

This flat stock is appropriate for job shop, tool room, and industrial maintenance applications where O1 tool steel is the specified material. It is supplied in the annealed condition and is intended to be machined to final shape before oil-hardening heat treatment. The 1 inch by 12 inch by 18 inch blank provides sufficient material for medium to large die plates, fixture bases, or multiple smaller tooling components cut from a single piece.

Key Features

• AISI Type O1 oil-hardening tool steel for predictable heat treatment response
• Thickness held to plus or minus 0.001 inches for precise starting dimensions
• Width tolerance of 0.000 to minus 0.015 inches ensures material is never oversized
• Length tolerance of plus 0.250 inches provides stock allowance for facing operations
• Edge squareness held to 0.003 inches per inch on all edges
• Supplied in annealed condition for machinability prior to hardening

Compatibility

Designed as a general-purpose O1 tool steel flat stock blank for use in tool and die making, fixture fabrication, and precision machining applications where AISI Type O1 oil-hardening tool steel is required.

Installation Notes

Machining and heat treatment of tool steel should be performed by qualified tool and die makers or machinists familiar with O1 steel handling procedures. Always follow established shop safety practices when cutting, grinding, or machining tool steel. Oil-hardening heat treatment requires controlled furnace equipment and appropriate quench media — consult the material specification before processing. Wear appropriate PPE when handling bar stock of this size and weight.