Starrett 54534 O1 Tool Steel Flat Stock 1.5x4x36 in

Product Description

The STARRETT 54534 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die making, and precision machining applications. Measuring 1.5 inches thick, 4 inches wide, and 36 inches long, this flat stock is manufactured to close dimensional tolerances, making it suitable for applications where precise stock sizing reduces secondary machining time. The material conforms to AISI Type O1 oil-hardening tool steel specification, a widely used grade known for its good machinability in the annealed state and predictable hardening response when quenched in oil. The piece weighs approximately 61.2 pounds.

This flat stock is intended for use by toolmakers, machinists, and die shops fabricating punches, dies, gauges, jigs, and fixtures. It ships in annealed condition, allowing cutting, milling, drilling, and grinding before hardening. The 36-inch length provides a full working blank for most standard toolroom applications. Squareness is held to 0.003 inches per inch on all edges, supporting accurate layout and machining from the as-received bar.

Key Features

• AISI Type O1 oil-hardening tool steel for predictable heat treat response
• Thickness tolerance of plus or minus 0.001 inches for close stock sizing
• Width tolerance of 0.000 to minus 0.005 inches
• Length tolerance of plus 0.015 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 hardening

Compatibility

Designed as a general-purpose O1 oil-hardening tool steel flat stock suitable for toolroom, die shop, and precision fabrication applications requiring AISI Type O1 material in flat bar form.

Installation Notes

Cutting and machining of tool steel flat stock should be performed with appropriate metalworking equipment by qualified machinists or toolmakers. Use proper cutting fluids and tooling rated for tool steel. Heat treating and oil quenching operations must follow established metallurgical procedures and applicable shop safety protocols. Handle with care due to significant piece weight of 61.2 pounds.