Starrett 54146 O1 Tool Steel Flat Stock 7/16x6x18 in

Product Description

The STARRETT 54146 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die making, jig construction, and general machining applications. Conforming to AISI Type O1 material specification, this flat stock measures 7/16 inches thick, 6 inches wide, and 18 inches long, with a finished weight of 13.39 pounds. Thickness and squareness tolerances are held to plus or minus 0.001 inches, making this stock suitable for precision work where dimensional consistency matters before and after heat treatment. Licensed machinists, toolmakers, and metalworking shops are the primary users.

O1 tool steel flat stock is well suited for fabricating punches, dies, gauges, cutting tools, and fixtures in both job shop and production environments. The oil-hardening grade offers good machinability in the annealed state and hardens uniformly when quenched in oil, making it a reliable choice when close dimensional control through the hardening process is required. This piece is supplied in annealed condition, ready for machining prior to heat treatment.

Key Features

• AISI Type O1 oil-hardening tool steel for consistent hardenability
• Thickness tolerance of plus or minus 0.001 inches for precision fitment
• Width tolerance of 0.000 to minus 0.005 inches
• Length tolerance of plus 0.250 inches, minus 0 inches
• Squareness held to 0.003 inches per inch on all edges
• Supplied in annealed condition for easy pre-heat-treatment machining

Compatibility

Designed as a general-purpose O1 tool steel flat bar suitable for toolmaking, die making, and precision fixture fabrication where AISI Type O1 oil-hardening material is specified.

Installation Notes

Machining and heat treatment of tool steel should be performed by qualified toolmakers or machinists familiar with O1 grade handling procedures. Always follow appropriate shop safety practices when cutting, grinding, or heat treating tool steel, including the use of proper PPE. Oil quenching should be performed per established metallurgical procedures for AISI O1 to achieve target hardness without cracking. Consult material safety data and applicable shop standards before beginning heat treatment operations.