Drill Rod Tool Steels 81175572 4142 Alloy Flat Stock

Product Description

The DRILL ROD TOOL STEELS 81175572 is a pre hardened alloy steel flat stock bar cut to 36 inches long, 1-3/4 inches wide, and 3/16 inch thick. Manufactured to AISI/SAE Type 4142 specification, this chromium-molybdenum alloy steel is supplied in a pre hardened condition, meaning it arrives ready for machining, grinding, or fabrication without additional heat treatment. The piece weighs 3.33 pounds and holds tight dimensional tolerances throughout: plus 0.250 inches on length, plus 0.005 inches on width, plus 0.001 inches on thickness, and 0.003 inches square tolerance. Machinists, tool and die makers, and industrial fabricators use this stock for tooling, fixtures, and structural components that demand consistent hardness and dimensional control.

This flat stock is suited for general industrial and manufacturing applications where pre hardened chromium-molybdenum alloy steel is required. Common uses include die components, machine parts, structural supports, jigs, and fixture plates. The AISI/SAE 4142 grade is well established in tool and die shops, maintenance and repair operations, and production machining environments. Individual pieces ship at a minimum order quantity of one, making it practical for single-part jobs or prototype work as well as production runs.

Key Features

• AISI/SAE Type 4142 chromium-molybdenum alloy steel for reliable hardness and toughness
• Pre hardened condition - no additional heat treatment required before machining or grinding
• Tight thickness tolerance of plus 0.001 inches for precise fitment in tooling applications
• Width tolerance of plus 0.005 inches and square tolerance of 0.003 inches for dimensional consistency
• 36 inch length provides full bar stock for layout and cutting to finished dimensions
• Single-piece minimum order quantity for flexibility on small jobs

Compatibility

Designed as a standard AISI/SAE Type 4142 pre hardened alloy steel flat bar suitable for general tool and die, fixture, and machine component fabrication across industrial and manufacturing applications.

Installation Notes

Cutting, drilling, or grinding pre hardened alloy steel requires tooling rated for hardened materials - standard high-speed steel tooling may wear prematurely. Carbide-tipped or cobalt tooling is commonly used for machining 4142 pre hardened stock. Always wear appropriate personal protective equipment when cutting or grinding steel bar stock. Consult applicable shop safety standards and employer procedures before beginning any cutting or fabrication operation.