Starrett 54453 O1 Tool Steel Flat Stock 0.5x10x36 in

Product Description

The STARRETT 54453 is an O1 oil-hardening tool steel flat stock bar sized at 0.5 inches thick, 10 inches wide, and 36 inches long. O1 is a general-purpose tool steel known for consistent hardening response, good machinability in the annealed state, and excellent edge retention after heat treatment. This flat stock is supplied in annealed condition and is ready for machining, grinding, and subsequent oil-quench hardening. Thickness tolerance is held to plus or minus 0.001 inches, making it suitable for precision tooling, jigs, fixtures, dies, and gauges where tight dimensional control is required before hardening. At 51 pounds, this is a full-size bar intended for shop or industrial use by tool and die makers, machinists, and moldmakers.

O1 tool steel flat stock in this size range is used in tool rooms, die shops, and production machine shops. Common applications include blanking dies, forming dies, punches, drill jigs, fixture plates, and gauging components. The 10-inch width and 36-inch length provide ample stock for cutting multiple blanks from a single piece. This material is also appropriate for custom knife blanks and precision hand tools where a tough, hardenable steel is specified. Installation or use is carried out by machinists and tool and die makers in metal fabrication environments.

Key Features

• AISI Type O1 oil-hardening tool steel for predictable, controlled heat treatment response
• Thickness tolerance of plus or minus 0.001 inches for tight pre-machining dimensional accuracy
• Length tolerance of plus 0.015 inches, zero minus for consistent cut-to-length stock
• Width tolerance of 0.000 to 0.015 inches negative for reliable fit in fixtures
• Edge squareness held to 0.003 inches per inch across all edges
• Supplied in annealed condition for ease of machining prior to hardening

Compatibility

Designed as a standard AISI Type O1 oil-hardening tool steel flat bar suitable for general tool room and die shop applications requiring a hardenable, precision-tolerance steel flat stock.

Installation Notes

Machining and grinding should be completed while the material is in the annealed state before oil-quench hardening. Heat treatment should follow established AISI O1 austenitizing and quenching procedures performed by qualified personnel using appropriate equipment. Secure workholding is required during machining given the part size and weight. Post-hardening grinding to final dimensions is standard practice for critical tolerance surfaces.