Drill Rod Tool Steels 81175036 Alloy Steel Flat Stock

Product Description

The DRILL ROD TOOL STEELS 81175036 is a pre-hardened alloy steel flat stock bar conforming to AISI/SAE Type 4142 specification. This bar measures 18 inches long by 8 inches wide by 0.75 inches thick and weighs approximately 30.46 pounds. Pre-hardened 4142 chromoly alloy steel offers a balance of toughness and wear resistance straight from the supplier, eliminating the need for additional heat treatment in most tooling and fixture applications. Machinists, tool and die makers, and fabrication shops rely on this material for jigs, fixtures, dies, and structural tooling components that require dimensional stability and consistent mechanical properties.

This flat stock is suited for general machining, milling, and fabrication applications in job shop, production machining, and industrial manufacturing environments. The pre-hardened condition makes it ready for machining to final dimensions without a separate hardening step. Typical end uses include die plates, mold bases, fixture plates, support blocks, and wear pads. The 8-inch width and 18-inch length provide sufficient stock for a wide range of medium-scale tooling blanks. Both commercial and industrial fabrication shops use this material wherever close-tolerance flat stock is required.

Key Features

• AISI/SAE Type 4142 chromoly alloy steel in pre-hardened condition for immediate machining use
• Nominal dimensions: 18 inches long x 8 inches wide x 0.75 inches thick
• Length tolerance: plus 0.125 inches, ensuring stock is never undersized in length
• Width tolerance: plus 0.005 inches for consistent stock width
• Thickness tolerance: plus 0.001 inches for close-tolerance flatness applications
• Square tolerance: 0.003 inches for reliable perpendicularity across faces

Compatibility

Designed as a general-purpose pre-hardened flat bar for tooling, die making, fixture fabrication, and structural machining applications requiring AISI/SAE 4142 alloy steel specification compliance.

Installation Notes

Handling and machining of alloy steel flat stock should be performed by qualified machinists or fabricators using appropriate cutting tools rated for hardened steel. Secure workpieces properly in a vise or fixture before any cutting, milling, or drilling operation to prevent movement. Use appropriate personal protective equipment including eye protection and cut-resistant gloves when handling raw stock edges. Consult applicable shop safety standards and material safety data for 4142 alloy steel before grinding or welding operations.