Drill Rod Tool Steels 81174393 Alloy Steel Flat Stock

Product Description

The DRILL ROD TOOL STEELS 81174393 is a pre-hardened alloy steel flat stock bar conforming to AISI/SAE Type 4142 specification. It measures 18 inches long by 4.5 inches wide by 0.375 inches thick and weighs 8.57 pounds. The 4142 chromoly alloy delivers a balance of toughness, wear resistance, and machinability in the pre-hardened condition, making it suitable for tooling, fixtures, die components, and structural machine parts. Machinists, toolmakers, and fabricators working in job shops and manufacturing facilities are the primary users of this material.

This flat stock is appropriate for applications requiring consistent cross-section geometry and tight dimensional tolerances. Typical uses include jig plates, fixture bases, wear plates, and precision machined components where pre-hardened stock eliminates a separate heat-treat step. The material ships to length and width tolerances that support direct layout and machining without excessive stock removal.

Key Features

• AISI/SAE Type 4142 chromoly alloy in pre-hardened condition for immediate machining or fabrication use
• Length tolerance of plus 0.125 inches ensures no undersize pieces
• Width tolerance of plus 0.005 inches for close-fit layout work
• Thickness tolerance of plus 0.001 inches supports precision stack and fixture applications
• Square tolerance of 0.003 inches maintains perpendicularity across the cross-section
• Single-piece minimum order quantity accommodates low-volume and prototype work

Compatibility

Designed as a standard flat bar replacement or raw stock for tooling, fixture, and die applications requiring AISI/SAE 4142 pre-hardened alloy steel in an 18 x 4.5 x 0.375 inch form factor.

Installation Notes

Cutting and machining of pre-hardened 4142 alloy steel requires carbide tooling; high-speed steel tooling will wear rapidly at typical hardness levels. Follow standard shop safety practices including eye protection, machine guarding, and chip management when sawing or milling this material. Welding pre-hardened 4142 is not recommended without proper preheat and post-weld heat treatment procedures per applicable welding codes. Consult material safety data and applicable OSHA standards for grinding or cutting operations that generate metallic dust or fumes.