Drill Rod Tool Steels 81174641 4142 Alloy Steel Flat Stock

Product Description

The DRILL ROD TOOL STEELS 81174641 is a pre hardened alloy steel flat stock bar made to AISI/SAE Type 4142 specification. It measures 18 inches long, 6 inches wide, and 0.5 inches thick, and weighs 15.23 pounds. Type 4142 is a chromium-molybdenum alloy steel widely used in tooling, fixturing, and structural applications where elevated hardness, toughness, and wear resistance are required straight off the shelf. Machinists, toolmakers, and fabricators use this material when a through-hardened flat bar is needed without additional heat treatment before use. Tight tolerances on all four dimensions make it suitable for precision fabrication work.

This flat stock is used across industrial and commercial fabrication shops for producing jigs, fixtures, mold bases, die components, machine parts, and structural supports. The pre hardened condition eliminates the need for in-house heat treating in most applications, saving time and reducing distortion risk. It is appropriate for general machining with carbide tooling and is commonly found in tool rooms, production shops, and maintenance departments handling high-stress component work.

Key Features

• AISI/SAE Type 4142 chromium-molybdenum alloy steel - pre hardened for immediate use
• 18 inches long with a length tolerance of +0.125 inches
• 6 inches wide with a width tolerance of +0.005 inches
• 0.5 inches thick with a thickness tolerance of +0.001 inches
• Square tolerance of 0.003 inches for consistent geometry
• Weighs 15.23 pounds - single piece per package

Compatibility

Designed as a general-purpose pre hardened alloy steel flat bar for use in tooling, fixturing, and structural fabrication applications requiring AISI/SAE Type 4142 material specification.

Installation Notes

Cutting and machining of pre hardened 4142 alloy steel should be performed with carbide tooling rated for hardened steel. Proper workholding and clamping should be verified before any machining operation. Always wear appropriate PPE when cutting or grinding alloy steel bar stock. Consult your shop safety plan and applicable OSHA standards when handling heavy stock material of this size and weight.