Drill Rod Tool Steels 81174997 4142 Alloy Flat Stock

Product Description

The DRILL ROD TOOL STEELS 81174997 is a pre-hardened alloy steel flat stock bar cut to 18 inches long, 4.5 inches wide, and 0.75 inches thick. Manufactured to AISI/SAE Type 4142 specification, this chromium-molybdenum alloy delivers high strength and toughness in the pre-hardened condition, making it suitable for tooling, fixtures, mold bases, dies, and structural machine components. At 17.13 pounds per piece, this is a substantial bar section intended for machining operations where close-tolerance stock is required. Machinists, tool and die makers, and fabricators working in job shops or maintenance departments are the primary users of this material.

This flat stock is appropriate for applications requiring a tough, wear-resistant alloy that can be machined and then finish-ground or used as-supplied. Typical uses include jig plates, wear plates, holder blocks, die sets, and general tooling fixtures in both production and maintenance machining environments. The pre-hardened condition eliminates the need for a separate through-hardening heat treat cycle, saving processing time when moderate hardness is sufficient for the application.

Key Features

• AISI/SAE Type 4142 chromium-molybdenum alloy steel in the pre-hardened condition
• Nominal dimensions: 18 inches long, 4.5 inches wide, 0.75 inches thick
• Length tolerance: plus 0.125 inches, minus 0 inches
• Width tolerance: plus 0.005 inches, minus 0 inches
• Thickness tolerance: plus 0.001 inches
• Square tolerance: 0.003 inches

Compatibility

Designed as a standard pre-hardened flat bar for general tooling, fixture, and machine component fabrication applications requiring AISI/SAE 4142 alloy steel stock.

Installation Notes

Cutting, drilling, and milling operations on pre-hardened 4142 alloy steel require carbide or high-speed tooling rated for hardened stock. Secure workpiece firmly in a vise or fixture before any machining operation. Follow applicable shop safety practices for metal cutting, including eye protection and chip management. Consult material data sheet for specific hardness range and machinability guidance before specifying in a critical load-bearing application.