Drill Rod Tool Steels 81175226 Flat Stock 4142 Alloy

Product Description

The DRILL ROD TOOL STEELS 81175226 is a pre-hardened alloy steel flat stock bar made to AISI/SAE Type 4142 specification. It measures 36 inches long, 0.25 inches wide, and 0.125 inches thick, and weighs approximately 0.32 pounds. Type 4142 is a chromium-molybdenum alloy steel known for its high strength, toughness, and good machinability in the pre-hardened condition. This flat stock is sold in single-piece quantity and is used by machinists, toolmakers, and fabricators who need tight-tolerance steel bar stock for tooling, fixtures, jigs, and structural components where precise fitment and consistent hardness are required.

This flat stock is suited for machine shops, maintenance facilities, and industrial fabrication environments. The pre-hardened condition eliminates the need for heat treatment before use in many tooling and fixturing applications. The 36-inch length provides a standard cut that works well for bench-length tooling projects or can be cut down to shorter lengths as needed. It is appropriate for both prototype and production use where AISI 4142 alloy steel properties are specified.

Key Features

• AISI/SAE Type 4142 chromium-molybdenum alloy steel in pre-hardened condition
• 36 inches long x 0.25 inches wide x 0.125 inches thick
• Length tolerance: +0.250 inches / -0.000 inches
• Width tolerance: +0.005 inches / -0.000 inches
• Thickness tolerance: +0.001 inches
• Square tolerance: 0.003 inches for consistent cross-section geometry

Compatibility

Designed as a standard AISI/SAE 4142 pre-hardened alloy steel flat stock for general tooling, fixturing, and fabrication applications where this material specification is required.

Installation Notes

Cutting and machining of hardened alloy steel requires appropriate tooling such as carbide-tipped or high-speed steel cutters rated for hardened stock. Always wear appropriate PPE including eye protection when cutting or grinding this material. Consult applicable shop safety standards and material handling guidelines before processing. Welding pre-hardened 4142 steel may require pre-heat and post-weld heat treatment to avoid cracking.