Starrett 54436 O1 Tool Steel Flat Stock 7/16x6x36 in

Product Description

The STARRETT 54436 is an O1 oil-hardening tool steel flat stock bar intended for toolmakers, machinists, and die makers who require a pre-sized, ready-to-machine blank. Conforming to AISI Type O1 specifications, this flat stock is supplied in an annealed condition suitable for machining, grinding, and subsequent oil-quench hardening. Key controlled dimensions are 7/16 inches thick, 6 inches wide, and 36 inches long, with a thickness tolerance of plus or minus 0.001 inches and a length tolerance of plus 0.015 inches. Weighing 26.77 pounds, it is heavy enough to require proper material handling during setup and fixturing.

This flat stock is used in tool and die shops, moldmaking operations, and precision machining environments where O1 tool steel is specified for punches, dies, gauges, fixtures, blades, and general tooling blanks. The 6-inch width and 36-inch length make it well suited as a starting blank for larger dies, parallels, or flat tooling components that are subsequently heat treated by oil quenching to achieve working hardness.

Key Features

• AISI Type O1 oil-hardening tool steel material specification
• Thickness tolerance of plus or minus 0.001 inches for close-tolerance machining
• Width tolerance of minus 0.000 to minus 0.005 inches
• Length tolerance of plus 0.015 inches
• Edge squareness held to 0.003 inches per inch on all edges
• Annealed condition allows full machining prior to heat treat

Compatibility

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

Installation Notes

Cutting, grinding, and machining of tool steel flat stock should be performed by qualified machinists using appropriate personal protective equipment and machine guarding. Oil quench hardening requires a controlled heat treat process typically performed by a qualified heat treater or in a properly equipped shop furnace — do not attempt hardening without proper equipment and thermal controls. Secure the bar firmly in a vise or fixture before sawing or milling operations. Follow applicable shop safety codes and material handling guidelines when moving stock of this weight.