Title

4140 Steel

Authors

Jacob Braselton, Mississippi State UniversityFollow

Files

Description

4140 steel is a high strength and tough steel used in many different applications, including oil and gas drill bits. In this application there is an additional requirement that further reduces the allowable amount of Sulfur in the material. This requirement was taken into account while developing a PSPP map for this material. Sulfur inclusions lead to reduced strength but increased ductility. In addition to the sulfur content, other process related variable are machining parameters, rolling parameters, treatment, and quenching methods. The structure section is comprised of grain size, grain boundaries, grain geometry, impurity dispersion, and dislocation density. The material properties include the surface integrity, wear resistance, strength, ductility, and hardness. All of these contribute the final performance of fatigue life, crack propagation, and first crack resistance.

Disciplines

Materials Science and Engineering | Mechanical Engineering | Metallurgy

College

James Worth Bagley College of Engineering

Department

Department of Mechanical Engineering

Recommended Citation

Braselton, Jacob, "4140 Steel" (2022). ME 4133/6133 Mechanical Metallurgy. 21.
https://scholarsjunction.msstate.edu/metallurgy/21