Starrett 54154 O1 Tool Steel Flat Stock 0.5x2.5x18 in

Product Description

The STARRETT 54154 is an O1 oil-hardening tool steel flat stock bar intended for tool and die makers, machinists, and metalworking professionals who need precise, heat-treatable stock material. Manufactured to AISI Type O1 specifications, this flat bar measures 0.5 inches thick, 2.5 inches wide, and 18 inches long. Thickness and squareness tolerances are held to plus or minus 0.001 inches, making it suitable for applications where dimensional accuracy before and after hardening is critical. At 6.38 pounds, the bar provides substantial material for custom tooling, punches, dies, gauges, and similar components.

O1 tool steel flat stock is used in job shops, tool rooms, and manufacturing facilities for producing custom cutting tools, blanking dies, forming punches, and precision fixtures. The oil-hardening grade is well suited for applications requiring a good balance of toughness and wear resistance after heat treatment. This bar ships in a single piece at 18 inches, giving machinists and toolmakers a workable starting length for most bench and mill operations.

Key Features

• AISI Type O1 oil-hardening tool steel for consistent heat-treat response
• Thickness tolerance of plus or minus 0.001 inches for precise starting dimensions
• Width tolerance of 0.000 to minus 0.005 inches
• Length tolerance of plus 0.25 inches, minus 0 inches
• Edge squareness held to 0.003 inches per inch on all edges
• Ready for machining, grinding, and subsequent oil-quench hardening

Compatibility

Designed as a standard O1 oil-hardening tool steel flat stock for general tool room and metalworking applications requiring AISI Type O1 material in 0.5 inch by 2.5 inch cross-section.

Installation Notes

Tool steel flat stock is worked by machinists and tool and die makers using standard milling, sawing, and surface grinding equipment. Follow your shop safety plan and applicable OSHA standards when cutting or grinding tool steel. Heat treatment should be performed by qualified personnel following established procedures for AISI O1 tool steel, including proper preheat, austenitizing temperature, and oil quench sequence. Always allow the bar to reach ambient temperature before taking final measurements.