Drill Rod Tool Steels 81174500 Flat Stock 4142 Alloy

Product Description

The DRILL ROD TOOL STEELS 81174500 is a pre-hardened flat stock bar made from AISI/SAE Type 4142 chromium-molybdenum alloy steel. It measures 18 inches long, 0.75 inches wide, and 0.5 inches thick, with a weight of 1.9 pounds. Pre-hardened 4142 alloy steel offers significantly higher strength and wear resistance than mild steel or standard tool steel in the annealed condition, making it ready for machining into tooling, fixtures, dies, and structural components without additional heat treatment. Machinists, tool-and-die makers, and industrial fabricators typically work with this stock.

This flat stock is suited for applications requiring a tough, wear-resistant material that can be machined to close tolerances. Typical uses include jigs, fixtures, guides, spacers, and machine components where dimensional accuracy and material strength are priorities. The pre-hardened condition saves processing time in production environments. It is appropriate for both one-off toolroom work and short-run manufacturing where consistent material properties are required from piece to piece.

Key Features

• AISI/SAE Type 4142 chromium-molybdenum alloy steel for high strength and toughness
• Pre-hardened condition eliminates the need for additional heat treatment before use
• Length tolerance of +0.125 inches allows for cut-to-size stock without undersize risk
• Width tolerance of +0.005 inches supports close-tolerance machining applications
• Thickness tolerance of +0.001 inches for precise fitment in tool and die work
• Square tolerance of 0.003 inches ensures flat, square stock suitable for precision setups

Compatibility

Designed as a general-purpose pre-hardened flat bar for toolroom, fixture, and machine component fabrication where AISI/SAE Type 4142 alloy steel material specification is required.

Installation Notes

Cutting and machining of alloy steel flat stock should be performed by qualified machinists using appropriate tooling rated for hardened steel. Carbide tooling is typically recommended when machining pre-hardened 4142 material. Secure the workpiece firmly before cutting or milling to prevent movement. Grinding or EDM processes may be preferred over conventional machining when working to very tight final tolerances.