Starrett 54012 O1 Tool Steel Flat Stock 1/8x5x18 Inch

Product Description

The STARRETT 54012 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die making, punch fabrication, and precision machining applications. Manufactured to AISI Type O1 specifications, this flat stock measures 1/8 inch thick, 5 inches wide, and 18 inches long, with a weight of 3.19 pounds. Thickness tolerance is held to plus or minus 0.001 inches, and edge squareness is maintained at 0.003 inches per inch across all edges. O1 tool steel offers excellent machinability in the annealed state and responds well to oil-quench hardening, making it a reliable choice for precision tooling blanks and wear components.

This flat stock is suited for machine shops, tool and die operations, and maintenance departments that fabricate custom tooling, gauges, jigs, fixtures, or cutting blades. It is supplied in the annealed condition, ready for machining prior to hardening. The 18-inch length and 5-inch width provide sufficient material for a wide range of tooling blank applications in both production and job-shop environments. Professionals working in metalworking trades will find this stock appropriate wherever tight dimensional tolerances and consistent material quality are required.

Key Features

• AISI Type O1 oil-hardening tool steel for consistent heat-treat response
• Thickness held to plus or minus 0.001 inches for tight-tolerance tooling work
• Edge squareness maintained at 0.003 inches per inch on all edges
• Width tolerance of 0.000 to 0.005 inches under nominal
• Length tolerance of plus 0.250 inches, minus 0 inches
• Supplied in annealed condition for ease of machining before hardening

Compatibility

Designed as a general-purpose O1 tool steel flat stock suitable for toolmaking, die making, and precision fabrication applications requiring oil-hardening material in annealed flat bar form.

Installation Notes

Machining and hardening of O1 tool steel should be performed by qualified machinists or tool and die makers using appropriate cutting tools rated for tool steel. Heat treatment, including austenitizing temperature and oil-quench procedure, should follow established metallurgical guidelines for AISI O1. Always wear appropriate PPE when grinding or machining tool steel. Allow material to reach ambient temperature before taking final dimensional measurements after any thermal operation.