Starrett 54198 O1 Tool Steel Flat Stock 0.75x6x18 in

Product Description

The STARRETT 54198 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 0.75 inches thick, 6 inches wide, and 18 inches long and weighs 22.95 pounds. Thickness tolerance is held to plus or minus 0.001 inches, and squareness across all edges is controlled to 0.003 inches per inch. O1 tool steel offers good machinability in the annealed state and responds well to oil-quench hardening, making it a reliable choice for toolroom stock that will be machined, heat treated, and finished to close tolerances.

This flat stock is suited for toolroom and machine shop use in the fabrication of punches, dies, gauges, fixtures, and similar precision components. Its large cross-section and length provide enough material for multiple parts or for a single large tool blank. Licensed machinists, toolmakers, and die makers working in job shops, production facilities, or maintenance departments are the typical end users. The annealed condition allows straightforward milling, grinding, or EDM operations prior to heat treatment.

Key Features

• AISI Type O1 oil-hardening tool steel for reliable heat-treat response
• Thickness tolerance of plus or minus 0.001 inches for precise stock removal planning
• Width tolerance of 0.000 to minus 0.005 inches
• Length tolerance of plus 0.250 inches, minus 0 inches
• Edge squareness controlled to 0.003 inches per inch across all edges
• Large flat stock format suitable for die blanks, fixture plates, and gauge stock

Compatibility

Designed as a general-purpose O1 oil-hardening tool steel flat stock suitable for standard toolroom machining and heat-treating operations where AISI Type O1 material specification is required.

Installation Notes

Cutting, milling, and grinding of tool steel flat stock should be performed by qualified machinists using appropriate coolant and tooling rated for hardened or semi-hard steel. Material should be handled and stored flat to prevent warping. Heat treatment, including hardening and tempering, should follow established procedures for AISI O1 tool steel and should be performed in a controlled environment by experienced personnel. Always use appropriate personal protective equipment when cutting or handling metal stock.