Drill Rod Tool Steels 81174476 Flat Stock 4142 Alloy

Product Description

The DRILL ROD TOOL STEELS 81174476 is a pre-hardened alloy steel flat stock bar conforming to AISI/SAE Type 4142 specification. This piece measures 18 inches long by 14 inches wide by 0.375 inches thick and weighs 26.65 pounds. Type 4142 chromium-molybdenum steel is supplied in a pre-hardened condition, delivering improved strength, toughness, and wear resistance compared to mild steel flat bar. It is ready for secondary machining, grinding, or fabrication without requiring additional heat treatment for most tooling and structural applications. Machinists, tool and die makers, and fabricators work with this material in job shops and industrial manufacturing environments.

This flat stock is suited for applications demanding higher strength than standard low-carbon steel, including die plates, fixture components, machine parts, jigs, and structural tooling inserts. The pre-hardened condition makes it appropriate for short-run tooling, wear plates, and precision machined components where dimensional consistency is critical. The piece is sold as a single unit and is intended for professional machining and fabrication use.

Key Features

• AISI/SAE Type 4142 chromium-molybdenum alloy steel, pre-hardened for improved strength and toughness
• Ready for machining and grinding without additional heat treatment for most applications
• Length tolerance of plus 0.125 inches ensures consistent minimum length
• Width tolerance of plus 0.005 inches for predictable stock allowance during machining
• Thickness tolerance of plus 0.001 inches for tight dimensional control
• Square tolerance of 0.003 inches supports precise layout and fixturing

Compatibility

Designed as a general-purpose pre-hardened alloy steel flat stock for tooling, die making, and fabrication applications requiring AISI/SAE Type 4142 chromium-molybdenum material specification.

Installation Notes

This material is intended for use by qualified machinists and fabricators familiar with alloy steel cutting, grinding, and milling operations. Always use appropriate cutting fluids and tooling rated for pre-hardened alloy steel to avoid premature tool wear. Secure the workpiece properly in a vise or fixture before any machining operation. Personal protective equipment including eye protection and gloves is required when cutting or grinding steel stock.