Starrett 57620 A2 Tool Steel Flat Stock 0.625x4x18 in

Product Description

The STARRETT 57620 is an A2 air-hardening tool steel flat stock bar intended for toolmakers, machinists, and die makers who require a dimensionally consistent, pre-sized blank ready for heat treatment. The piece measures 0.625 inches thick, 4 inches wide, and 18 inches long. Thickness, width, and squareness tolerances are held to +0.010 to 0.015 inches, with a length tolerance of +0.250 inches. A2 tool steel offers good dimensional stability through the air-hardening process, making it a practical choice for punches, dies, gauges, and similar precision tooling applications.

This flat stock is suited for job shops, tool and die operations, and maintenance departments that fabricate or refurbish cutting tools, forming dies, and wear components. The 18-inch length provides a useful starting blank for multiple smaller parts or a single medium-sized tool body. Because it ships in an annealed or near-annealed condition, it can be machined to final dimensions before hardening. Professionals in metal fabrication, aerospace tooling, and general manufacturing commonly work with this stock type.

Key Features

• A2 air-hardening tool steel construction for stable heat treatment and minimal distortion
• Thickness of 0.625 inches with a +0.010 to 0.015 inch tolerance
• Width of 4 inches with a +0.010 to 0.015 inch tolerance
• Length of 18 inches with a +0.250 inch tolerance
• Squareness tolerance held to +0.010 to 0.015 inches for consistent blank geometry
• Single-piece package quantity suitable for low-volume toolroom use

Compatibility

Designed as a standard A2 air-hardening tool steel flat blank compatible with conventional toolroom machining, grinding, and heat-treatment processes per AISI A2 material specifications.

Installation Notes

Machining and heat treatment of A2 tool steel should be performed by qualified toolmakers or machinists familiar with AISI tool steel specifications. Follow the material supplier's recommended austenitizing, quench, and temper procedures for A2 steel to achieve target hardness. Always use appropriate personal protective equipment when cutting, grinding, or heat-treating tool steel. Consult applicable shop safety codes and equipment manufacturer guidelines before beginning work.