Starrett 54018 O1 Tool Steel Flat Stock 0.125x14x18 in

Product Description

The STARRETT 54018 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die work, gauges, and precision machined components. Manufactured to AISI Type O1 specifications, this flat stock measures 0.125 inches thick, 14 inches wide, and 18 inches long. Thickness tolerance is held to plus or minus 0.001 inches, giving machinists and toolmakers a reliable starting blank with tight dimensional control. At 8.94 pounds, this is a substantial piece suited for shop floor use. O1 tool steel offers good machinability in the annealed state and responds well to oil-quench hardening, making it a standard choice for cutting tools, jigs, fixtures, and wear components.

This flat stock is suited for machine shops, tool and die operations, and maintenance departments that fabricate custom tooling or replacement wear parts. It is commonly used in applications requiring a hardenable steel with predictable dimensional stability. The 14-inch width and 18-inch length provide enough material for most small-to-medium tooling blanks without requiring further resizing. Machinists working on precision gauges, punches, forming dies, or flat tools will find this stock ready to machine and finish-grind before hardening and tempering to the required hardness.

Key Features

• AISI Type O1 oil-hardening tool steel for predictable heat treat response
• Thickness tolerance of plus or minus 0.001 inches for precise stock removal planning
• Length tolerance of plus 0.250 inches, 0 minus, ensuring full-length material
• Width tolerance of 0.000 to minus 0.015 inches for consistent fitment
• Edge squareness held to 0.003 inches per inch on all edges
• Good machinability in annealed condition prior to hardening

Compatibility

Designed as a general-purpose O1 oil-hardening tool steel flat stock blank suitable for toolmaking, die making, gauging, and precision fabrication applications requiring AISI Type O1 material.

Installation Notes

Machining and hardening of tool steel flat stock is performed by qualified machinists and tool and die makers. Material should be machined in the annealed state before heat treatment. Follow recognized heat treating procedures for AISI O1 tool steel including proper soak temperatures and oil quench technique. Always wear appropriate PPE when grinding, machining, or heat treating tool steel.