Starrett 54200 O1 Tool Steel Flat Stock 0.75x10x18 in

Product Description

The STARRETT 54200 is an O1 oil-hardening tool steel flat stock blank used in toolmaking, die making, and precision machining applications. Manufactured to AISI Type O1 specifications, this flat stock measures 0.75 inches thick, 10 inches wide, and 18 inches long. Thickness tolerance is held to plus or minus 0.001 inches, and squareness is maintained to 0.003 inches per inch on all edges. At 38.25 pounds, this is a substantial blank suited for demanding shop and production environments. It is typically worked by machinists, tool and die makers, and industrial maintenance professionals who require tight dimensional control before hardening.

O1 tool steel flat stock is used in the fabrication of dies, punches, gauges, bushings, and other tooling components requiring oil-hardening heat treatment. The 10-inch width and 18-inch length provide ample material for cutting multiple smaller blanks or for machining a single large component. This stock is appropriate for both job shop and production toolroom use where close-tolerance starting material reduces downstream grinding and finishing time.

Key Features

• AISI Type O1 oil-hardening tool steel for predictable heat treat response
• Thickness tolerance of plus or minus 0.001 inches for precise as-received fitment
• Width tolerance of 0.000 to minus 0.015 inches
• Length tolerance of plus 0.250 inches, minus 0 inches
• Squareness held to 0.003 inches per inch on all edges
• Large 10 inches by 18 inches face allows multiple blanks from a single piece

Compatibility

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

Installation Notes

Machining and heat treatment of tool steel flat stock should be performed by qualified machinists or tool and die makers familiar with O1 oil-hardening procedures. Appropriate personal protective equipment and machine guarding are required during all cutting, grinding, and milling operations. Oil-hardening heat treatment must follow established time-and-temperature cycles appropriate for AISI O1 steel and should be performed in a controlled atmosphere or properly equipped furnace to minimize decarburization. Always allow stock to reach ambient temperature before performing final precision measurements.