Drill Rod Tool Steels 81176620 4142 Alloy Steel Flat Stock

Product Description

The DRILL ROD TOOL STEELS 81176620 is an AISI/SAE Type 4142 alloy steel flat bar supplied in the pre-hardened condition. The stock measures 36 inches long by 12 inches wide by 0.5 inches thick and weighs approximately 60.91 pounds. Pre-hardening eliminates the need for additional heat treatment in most tooling and fixturing applications, saving time on the shop floor. Machinists, tool-and-die makers, and industrial fabricators work with this material when they need a high-strength, wear-resistant flat stock that is ready to machine to final dimensions without a separate hardening step.

This flat stock is suited for tooling plates, die blocks, jigs, fixtures, and structural machine components where consistent hardness and close dimensional tolerances are required. The 12-inch width and 36-inch length provide a large working blank for medium to large tooling projects. The pre-hardened condition is particularly useful in production environments where heat-treat distortion must be avoided after final machining.

Key Features

• AISI/SAE Type 4142 alloy steel for high strength and toughness in the pre-hardened state
• Pre-hardened condition - no post-machining heat treatment required for most applications
• Length tolerance of plus 0.25 inches ensures full usable stock length
• Width tolerance of plus 0.005 inches for consistent fit in precision setups
• Thickness tolerance of plus 0.001 inches supports tight stack-up requirements
• Square tolerance of 0.003 inches for reliable squareness across the section

Compatibility

Designed as a general-purpose pre-hardened flat stock for tooling, die-making, fixturing, and structural machine component fabrication applications requiring AISI/SAE Type 4142 alloy steel.

Installation Notes

Cutting and machining of pre-hardened alloy steel requires carbide tooling and appropriate feeds and speeds for hardened material. Always secure the workpiece firmly before sawing, milling, or grinding. Follow applicable shop safety standards including eye and hearing protection and proper chip-control practices. Consult material safety data for the alloy before grinding, as airborne metal dust requires respiratory controls.