Starrett 57212 A2 Tool Steel Flat Stock 0.625x3.5x18 in

Product Description

The STARRETT 57212 is an A2 air-hardening tool steel flat stock bar sized at 0.625 inches thick, 3.5 inches wide, and 18 inches long. A2 tool steel is a cold-work die steel known for its dimensional stability during heat treatment and good wear resistance after hardening. This flat stock is supplied in the annealed condition, ready for machining, grinding, and subsequent heat treat by a tool and die maker, machinist, or toolroom technician. Weighing 11.16 pounds, the bar is well-suited for fabricating dies, punches, gauges, and similar tooling components where tight dimensional tolerances are required before and after hardening.

This flat stock is used in toolroom and industrial manufacturing environments where A2 air-hardening tool steel is specified. Typical applications include cutting dies, forming tools, blanking punches, and precision fixtures. The 18-inch length provides adequate stock for most single-component tooling blanks, and the 0.625-inch thickness suits moderate-section die components. Machinists and tool and die makers working in job shops, stamping operations, and maintenance toolrooms will find this bar appropriate for standard toolroom practice.

Key Features

• A2 air-hardening tool steel per AISI designation, offering low distortion during heat treatment
• Thickness: 0.625 inches with a tolerance of +0.010 to 0.015 inches
• Width: 3.5 inches with a tolerance of +0.010 to 0.015 inches
• Length: 18 inches with a tolerance of +0.25 inches
• Square tolerance held to +0.010 to 0.015 inches for consistent cross-section geometry
• Supplied in annealed flat stock form, ready for machining prior to hardening

Compatibility

Designed as a standard AISI A2 air-hardening tool steel flat stock for use in toolroom, die-making, and industrial machining applications where A2 material specification is required.

Installation Notes

Machining and heat treatment of A2 tool steel should be performed by qualified toolmakers or machinists familiar with tool steel processing procedures. All grinding and machining operations should be completed prior to hardening and tempering. Heat treatment, including austenitizing and air-quench hardening, should follow the material manufacturer's published parameters and applicable shop safety procedures. Personal protective equipment appropriate to machining and heat treat operations should be worn at all times.