Drill Rod Tool Steels 81176331 4142 Alloy Steel Flat Stock

Product Description

The DRILL ROD TOOL STEELS 81176331 is a pre-hardened alloy steel flat stock bar conforming to AISI/SAE Type 4142 specification. Measuring 36 inches long, 4.5 inches wide, and 0.375 inches thick, this flat stock is supplied in a ready-to-use hardened condition, eliminating the need for additional heat treatment before use. Machinists, toolmakers, and metalworking professionals use 4142 pre-hardened flat stock for tooling fixtures, jigs, dies, wear plates, and structural components where higher strength and hardness than mild steel are required. The stock ships as a single piece per package.

This flat stock is suited for industrial machining shops, fabrication facilities, and toolroom applications. AISI/SAE 4142 is a chromium-molybdenum alloy steel known for its good toughness, fatigue resistance, and machinability in the pre-hardened condition. It is commonly used to produce fixtures, machine components, and wear-resistant parts in both light industrial and heavy manufacturing environments. At 17.13 pounds, this bar is substantial enough for structural tooling work while remaining manageable for single-operator handling on a machining setup.

Key Features

• AISI/SAE Type 4142 chromium-molybdenum alloy steel for enhanced strength and toughness
• Pre-hardened condition - no additional heat treatment required prior to use
• 36 inches long x 4.5 inches wide x 0.375 inches thick nominal dimensions
• Close tolerances: length +0.250 inches, width +0.005 inches, thickness +0.001 inches, square 0.003 inches
• Single piece per package with a minimum order quantity of one

Compatibility

Designed as a standard AISI/SAE Type 4142 pre-hardened alloy steel flat stock suitable for general toolroom, fixture, jig, and die fabrication applications where chromium-molybdenum alloy steel flat bar stock is specified.

Installation Notes

Cutting, drilling, and machining of pre-hardened 4142 alloy steel requires carbide tooling or equivalent hardened tooling - standard high-speed steel tooling will dull rapidly. Secure the workpiece firmly in a vise or fixture before machining operations. Welding pre-hardened 4142 is possible but requires preheat and post-weld stress relief per established welding procedures for alloy steels; consult applicable AWS standards. Wear appropriate PPE including eye protection and gloves when handling and cutting steel bar stock.