Starrett 54316 O1 Tool Steel Flat Stock 1/8x12x36

Product Description

The STARRETT 54316 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die making, and precision machining applications. It is supplied in an annealed (soft) condition, ready for machining and finishing before heat treatment. This flat stock measures 1/8 inch thick, 12 inches wide, and 36 inches long, with a thickness tolerance of plus or minus 0.001 inches. The AISI Type O1 designation indicates an oil-hardening grade known for dimensional stability during heat treat and good wear resistance after hardening. Machinists, toolmakers, and die makers are the primary users of this material.

This flat stock is suited for fabricating punches, dies, gauges, cutting tools, fixtures, and other precision toolroom components where close tolerances and predictable heat treat response are required. The 12-inch width and 36-inch length provide substantial stock for layout and cutting multiple workpieces from a single piece. At 15.31 pounds, this is a full-size flat that typically requires bench or saw handling rather than hand cutting.

Key Features

• AISI Type O1 oil-hardening tool steel for predictable hardening response and dimensional stability
• Thickness tolerance of plus or minus 0.001 inches for precision fitment without additional surface grinding
• Length tolerance of plus 0.015 inches, minus 0 inches — always full length or slightly over
• Width tolerance of 0.0000 to 0.015 inches — no undersize material
• Edge squareness held to 0.003 inches per inch across all edges
• Supplied annealed for easy machining prior to heat treatment

Compatibility

Designed as a general-purpose O1 oil-hardening tool steel flat stock for toolroom and die shop use. No specific equipment or system compatibility applies to this raw material form.

Installation Notes

Cutting and machining of tool steel flat stock should be performed by a qualified machinist using appropriate metalworking equipment such as a surface grinder, milling machine, or bandsaw rated for tool steel. Secure the workpiece firmly before any cutting or grinding operation. Heat treatment of O1 steel requires controlled quench in oil and should be performed according to the material supplier heat treat specifications and applicable shop safety procedures. Allow the material to reach a stable temperature before measuring for final tolerance verification.