Starrett 54250 O1 Tool Steel Flat Stock 2x2x18 in

Product Description

The STARRETT 54250 is an O1 oil-hardening tool steel flat stock bar intended for toolmakers, machinists, and die makers who need a precision-ground blank ready for heat treatment. It measures 2 inches thick by 2 inches wide by 18 inches long and is manufactured to AISI Type O1 material specification. Thickness and squareness tolerances are held to plus or minus 0.001 inches, making this stock suitable for applications where dimensional control before hardening is critical. At 20.4 pounds per piece, this is a substantial bar suited for fabricating punches, dies, gauges, and similar tooling components.

O1 tool steel flat stock is used across job shops, toolrooms, and maintenance-and-repair operations that produce or recondition tooling in-house. The 18-inch length provides enough material for multiple smaller tooling blanks or a single long form tool. Its oil-hardening characteristic means it responds well to controlled quench cycles, reducing the risk of distortion during heat treatment compared to water-hardening grades. This stock is appropriate for both production tooling environments and prototype work.

Key Features

• AISI Type O1 oil-hardening tool steel material specification
• Thickness tolerance of plus or minus 0.001 inches for precision fitment before heat treat
• Width tolerance of 0.000 to minus 0.005 inches
• Length tolerance of plus 0.250 inches, minus 0
• Edge squareness held to 0.003 inches per inch on all edges
• 20.4 pound bar weight suitable for substantial tooling blank applications

Compatibility

Designed as a general-purpose O1 oil-hardening tool steel flat stock blank for use in any toolroom or machining application requiring AISI O1 material in a 2 inch by 2 inch by 18 inch form factor.

Installation Notes

Machining and heat treatment of tool steel should be performed by qualified toolmakers or machinists familiar with O1 oil-hardening procedures. Always follow established shop safety practices when cutting, grinding, or heat-treating tool steel, including appropriate PPE and ventilation. Secure the bar properly in a vise or fixture before any cutting operation to prevent movement. Consult material data sheets for recommended heat treatment temperatures and quench media before processing.