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Heat Treatment, Microstructures and Performance of Carbon and Alloy Steels


Heat treated bar and forging steels remain the major material for parts (such as shafts, gears, bearing, fasteners, oil country tubulars, aircraft landing gear, tools of all sorts, and many other applications) manufactured for demanding applications that require high or ultra-high strength, high fatigue resistance, and /or high wear resistance, all combined with good levels of toughness and fracture resistance.

This course will review the phases that form in carbon and alloy steels and the modifications produced in the iron-carbon diagram by alloying and manufacture. Microstructures and the phase transformations by which they are produced in all phases of manufacture, from casting through quench and tempering, will be described and related to mechanical properties and performance, including fracture and potential embrittlement phenomena.

Steels: Processing, Structure and Performance, Second Edition A PDF of the text is included when taking this course.


  • Manufacturing personnel and engineers that specify steels and their heat treatment
  • Steel company operating personnel and sales engineers
  • Heat treatment managers
  • Heat treatment personnel
  • Heat treatment operators
  • Metallographers
  • Forensic laboratory personnel
  • Failure analysts and trouble shooters
  • Quality control personnel



Upon completion of this course, participants will be able to:

  • Recognize the microstructural components of heat treated steels, their formation, and how they determine mechanical properties and performance as a function of carbon and alloy content
  • Determine the effects of temperature during austenitizing and tempering and other heat treatment parameters on developing hardness and mechanical performance
  • Evaluate causes of cracking and low performance of heat treated steels
  • Enhance ability to select, manufacture, and heat treat steels for demanding applications



Previous participation in Metallurgy for the Non-Metallurgist™ or other Heat Treatment courses are helpful.

Course Outline

  • Introduction to Steels: Definitions, History, Primary Processing of Bar Steels
  • The Phases in Steels: Austenite, Ferrite, Cementite; Others depending on alloying
  • Fe-C Phase Diagram and Its Modifications
  • Ferritic, Pearlitic, Martensitic, Bainitic, and Austenitic Microstructures and Substructures
  • Review of Hardenability, Alloying, and Transformation  Diagrams
  • Effect of Primary Processing on Microstructure: Inclusions and Banding
  • Microalloyed Bar and Forging Steels
  • Quenched and Tempered Martensitic Microstructures
  • Hardness, Mechanical Properties, Deformation Behavior, and Fracture of Tempered Martensite
  • Quench Embrittlement, Tempered Martensite Embrittlement, Temper Embrittlement, Hydrogen Embrittlement


Refund Policy for Online and Self-Study Courses:

A refund will only be given for Online and/or Self-Study sales if requested in writing to ASM International’s Education Department at  within 30 days of purchasing the course(s). However, if ASM International records demonstrate that the student has accessed more than 2 lessons online  or opened the final exam within those 30 days then no refund will be issued.

Main Info


Members: $1870
Non Members: $1980



Heat Treatment, Microstructures and Performance of Carbon and Alloy Steels

Members: $1870
Non Members: $1980

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