Drill Rod Tool Steels 81173924 4142 Alloy Flat Stock

Product Description

The DRILL ROD TOOL STEELS 81173924 is an AISI/SAE Type 4142 alloy steel pre-hardened flat stock bar measuring 18 inches long, 4 inches wide, and 0.25 inches thick. This chromium-molybdenum alloy steel is supplied in a pre-hardened condition, delivering elevated strength and wear resistance without requiring additional heat treatment before use. At 5.08 pounds, this flat stock is suited for machining, fabrication, and tooling applications where dimensional consistency and material toughness are critical. Machinists, tool and die makers, and metal fabricators working in industrial and manufacturing environments are the primary users of this stock.

This flat stock is used in industrial machining shops and fabrication facilities for producing fixtures, jigs, dies, mold components, and structural machine parts. The pre-hardened 4142 alloy is a common choice for applications demanding higher tensile strength than mild steel but where through-hardening of a finished component is not practical. It is appropriate for both light and heavy fabrication settings where close-tolerance blanks are needed as starting material for secondary machining operations.

Key Features

• AISI/SAE Type 4142 chromium-molybdenum alloy steel in pre-hardened condition
• Nominal dimensions: 18 inches long, 4 inches wide, 0.25 inches thick
• Length tolerance: plus 0.125 inches
• Width tolerance: plus 0.005 inches
• Thickness tolerance: plus 0.001 inches
• Square tolerance: 0.003 inches for consistent flatness and squareness

Compatibility

Designed as a standard AISI/SAE Type 4142 pre-hardened alloy steel flat stock for use in general industrial machining, tooling, and fabrication applications requiring close-tolerance chromium-molybdenum alloy bar stock.

Installation Notes

This material is intended for use by qualified machinists and metal fabricators using appropriate cutting, grinding, and machining equipment rated for hardened alloy steels. Carbide tooling is typically required for efficient machining of pre-hardened 4142 stock. Consult applicable shop safety standards and equipment manufacturer guidelines before beginning any cutting or grinding operations. Proper personal protective equipment, including eye and face protection, must be worn during all machining operations.