Drill Rod Tool Steels 81175861 Flat Stock 4142

Product Description

The DRILL ROD TOOL STEELS 81175861 is a pre hardened alloy steel flat stock bar conforming to AISI/SAE Type 4142 specification. Measuring 36 inches long, 4 inches wide, and 0.25 inches thick, this flat stock is supplied ready for machining or fabrication without the need for additional heat treating. The 4142 chromium-molybdenum alloy composition delivers high tensile strength, excellent toughness, and good fatigue resistance, making it well suited for tooling, dies, fixtures, and structural machine components. This piece ships at 10.15 pounds. Machinists, tool and die makers, and industrial fabricators typically work with this material in shop environments where tight dimensional tolerances are required.

This flat stock is used across a wide range of industrial and manufacturing applications including mold bases, clamp plates, wear plates, brackets, and custom tooling components. Its pre hardened condition makes it a practical choice when through-hardening is not feasible or when a ready-to-use material is needed for rapid prototyping and low-volume production. It is appropriate for both general fabrication shops and precision machine shops handling ferrous stock materials.

Key Features

• AISI/SAE Type 4142 chromium-molybdenum alloy construction for high strength and toughness
• Pre hardened condition eliminates the need for additional heat treating after cutting
• Tight length tolerance of plus 0.250 inches for consistent stock sizing
• Width tolerance of plus 0.005 inches and thickness tolerance of plus 0.001 inches for precision fitment
• Square tolerance of 0.003 inches ensures dimensional accuracy across the cross section
• Single-piece package quantity supports individual project sourcing with no minimum overstock

Compatibility

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

Installation Notes

Machining, drilling, or cutting of pre hardened 4142 alloy steel should be performed by qualified machinists using tooling rated for hardened ferrous materials. Secure workpieces firmly before cutting or grinding operations to prevent movement. Grinding operations on hardened steel may generate heat buildup at the surface, so appropriate coolant or cooling intervals should be used to avoid altering material properties. Follow applicable shop safety standards and wear appropriate PPE when working with ferrous flat stock.