Starrett 57650 A2 Tool Steel Flat Stock 1x4x18 Inches

Product Description

The STARRETT 57650 is an A2 air-hardening tool steel flat stock bar used in toolmaking, die-making, and precision machining applications. Measuring 1 inch thick, 4 inches wide, and 18 inches long, this flat stock ships in a pre-cut, ready-to-use form suitable for annealed stock removal and subsequent heat treatment. A2 tool steel offers good wear resistance, moderate toughness, and low distortion during air-hardening heat treat cycles, making it a common choice for blanking dies, punches, form tools, and gauges. Machinists, tool and die makers, and industrial fabricators work with this material regularly.

This flat stock is suited for shop fabrication of tooling components in both prototype and production environments. The 1-inch thickness and 4-inch width provide sufficient cross-section for most medium-duty die and punch blanks without requiring further breakdown from larger bar stock. The 18-inch length allows for multiple tool blanks to be cut from a single piece. Thickness, width, and square tolerances are held to plus 0.010 to 0.015 inches, with a length tolerance of plus 0.25 inches, supporting direct layout and rough machining without additional straightening.

Key Features

• A2 air-hardening tool steel per AISI material specification A2
• Dimensions: 1 inch thick x 4 inches wide x 18 inches long
• Thickness tolerance: plus 0.010 to 0.015 inches
• Width tolerance: plus 0.010 to 0.015 inches
• Square tolerance: plus 0.010 to 0.015 inches
• Length tolerance: plus 0.25 inches
• Low distortion air-hardening grade suitable for dies, punches, and precision tooling blanks

Compatibility

Designed as a standard AISI A2 air-hardening tool steel flat stock for use in general toolmaking and die-making applications requiring low-distortion heat treatment and moderate wear resistance.

Installation Notes

A2 tool steel flat stock is worked by qualified machinists and tool and die makers using conventional milling, grinding, and EDM equipment. Material should be machined in the annealed condition before heat treatment. Follow established metallurgical procedures for austenitizing temperature, soak time, and air-quench cooling specific to A2 tool steel when hardening. Always use appropriate PPE and machine guarding during cutting and grinding operations.