Tool Steel Drill Rod O1

Tool Steel Drill Rod O1 is a general purpose oil-hardening tool and die steel. Normal care in heat treatment gives good results in hardening and produces small dimensional changes. O1 has good abrasion resistance and sufficient toughness for a wide variety of tool and die applications.

• Wear Resistance: Fair
• Machinability: Good
• Forming: Good
• Weldability: Fair
• Cold Working: Fair

• Blanking Dies
• Bushings
• Forming Dies
• Master Tools
• Forming Rolls
• Gauges
• Trim Dies

• Melting Point: 2590°F
• Density: 0.283 lb/in³
• Ultimate Tensile Strength: 245,000 psi
• Yield Tensile Strength: 218,000 psi
• Modulus of Elasticity: 31,000 ksi
• Shear Modulus: 11,900 ksi
• Poisson Ratio: 0.3

Common Uses for O1 Drill Rod

O1 works especially well for smaller tools and round components that benefit from a precise starting diameter and controlled heat-treatment response.

Punches, Pins, and Bushings

Punches, pins, and bushings are a natural fit for O1 steel rod because the round, ground starting shape is already close to the finished part. These components can be machined before hardening, then ground to final size when tighter tolerances are required.

Blanking and Forming Tools

O1 is also used for blanking dies, forming dies, trim dies, forming rolls, die buttons, and round punch components. It is well suited to smaller tooling where a balance of toughness, wear resistance, and machinability matters.

Gauges and Shop Fixtures

O1 tool steel rod is used for plug gauges, setting pins, locating pins, master tools, and fixture components where dimensional stability matters. These parts are often left slightly oversize before heat treatment and finished afterward to reach final tolerance.