Drill Rod Tool Steels 81176455 4142 Alloy Steel Flat Stock

Product Description

The DRILL ROD TOOL STEELS 81176455 is a pre hardened alloy steel flat stock bar conforming to AISI/SAE Type 4142 specification. It measures 36 inches long, 7/8 inch wide, and 1/2 inch thick, and weighs 4.44 pounds. Pre hardened 4142 chromium-molybdenum alloy steel offers excellent toughness, fatigue resistance, and strength compared to standard carbon steel bar stock. Machinists, tool and die makers, and industrial maintenance professionals use this flat stock for jigs, fixtures, tooling components, and wear-resistant parts where heat-treating in the field is not practical. Tight mill tolerances are held on all four dimensions, making this stock ready to machine to final dimensions without additional heat treatment.

This flat stock is suited for fabrication shops, machine shops, and maintenance departments requiring a reliable pre hardened alloy steel in a fractional flat bar profile. Typical applications include fabricating guide rails, support blocks, brackets, wear plates, and custom tooling inserts. The 36-inch length provides a full usable bar that can be cut to required lengths on a horizontal band saw or cold saw. The 7/8-inch width and 1/2-inch thickness make this bar compatible with standard milling vises and fixturing setups without additional stock removal.

Key Features

• AISI/SAE Type 4142 chromium-molybdenum alloy steel, supplied in pre hardened condition
• 36 inches long x 7/8 inch wide x 1/2 inch thick nominal dimensions
• Length tolerance: +0.250 inch / -0.000 inch
• Width tolerance: +0.005 inch / -0.000 inch
• Thickness tolerance: +0.001 inch / -0.000 inch
• Squareness tolerance: 0.003 inch

Compatibility

Designed as a standard pre hardened alloy flat bar for general machining, tooling, and fabrication applications requiring AISI/SAE Type 4142 alloy steel in a fractional flat stock profile.

Installation Notes

Cutting and machining of pre hardened 4142 alloy steel should be performed by a qualified machinist using appropriate tooling rated for hardened alloy steels. Carbide cutting tools are typically recommended for milling and turning operations. Wear appropriate PPE including eye protection and gloves when cutting or grinding. Welding pre hardened alloy steel may require preheat and post-weld heat treatment per applicable fabrication codes to avoid cracking.