Starrett 54412 O1 Tool Steel Flat Stock 3/8x1-3/4x36 in

Product Description

The STARRETT 54412 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die work, and precision machining applications. Manufactured to AISI Type O1 specification, this flat stock measures 3/8 inches thick, 1-3/4 inches wide, and 36 inches long, with a weight of 6.69 pounds. Thickness tolerance is held to plus or minus 0.001 inches, making this material suitable for applications where dimensional accuracy before hardening is critical. Machinists, tool and die makers, and industrial maintenance professionals use O1 flat stock as a starting material for punches, dies, gauges, and cutting tools that require oil-quench hardening to reach final hardness.

O1 tool steel flat stock in this size is a common choice for low-to-medium production tooling in job shops, maintenance departments, and fabrication facilities. The 36-inch bar length allows for multiple pieces to be cut from a single bar, reducing waste on smaller tool blanks. This material is appropriate for applications where the finished part will undergo oil quenching and tempering to achieve desired hardness, and where good machinability in the annealed state is required prior to heat treatment.

Key Features

• AISI Type O1 oil-hardening tool steel for consistent heat-treat response
• Thickness held to plus or minus 0.001 inches for precise pre-machining stock
• Width tolerance of 0.000 to minus 0.005 inches
• Length tolerance of plus 0.015 inches
• Edge squareness: all edges within 0.003 inches per inch
• Single 36-inch bar per package, sold individually

Compatibility

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

Installation Notes

Cutting, grinding, and machining should be performed while the material is in the annealed state before heat treatment. O1 tool steel is oil-quench hardened and should be processed by a qualified heat treater or machinist familiar with tool steel hardening procedures. Appropriate personal protective equipment and machine guarding are required when sawing or grinding flat stock. Follow applicable shop safety standards and equipment manufacturer guidelines when cutting to final dimensions.