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Molten gray iron being poured.

Gray Iron Fundamentals

Gray Iron Fundamentals introduces the learner to the world of cast irons, including the properties, processes, and terminology associated with gray iron production. Ready to take the next step? Explore the course details and see everything we’ve packed into this program!

Learning Hours: 2.5

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Course Description

Gray Iron Fundamentals introduces the learner to the world of cast irons, including the properties, processes, and terminology associated with gray iron production. This course also includes defect analysis of the manufactured product. Presented in THORS’ highly visual and interactive learning format, this course will help foundry employees become familiar with the important equipment processing steps associated with their profession.

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Who will benefit from this Gray Iron course?

Companies, individuals, or educational institutions that require knowledge about the properties of cast gray iron to design and manufacture components.

Course Classification

This manufacturing course by THORS eLearning Solutions covers identification of key terms and understanding of key concepts.

*THORS uses the Bloom’s Taxonomy Methodology for our course development.

Certificate Awarded for Gray Iron Fundamentals

Example of certificate awarded upon successful completion of the course.

*upon successful completion

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Learning Objectives

  1. Understand the composition of cast irons.
  2. Understand the role of the various alloying elements in gray iron production.
  3. Examine the mechanical properties and thermophysical properties of gray iron.
  4. Differentiate between carbide dissolution and matrix adjustment.
  5. Identify common defects that occur during the production of gray iron castings.
  6. Recognize the grading systems used by ASTM and SAE.
The general stages of gray iron casting include melting, casting, shakeout, finishing, inspection, and shipping.
Gray Iron Fundamentals

Table of Contents

  1. Gray Iron Properties
    1. Mechanical Properties
      1. Ultimate Tensile Strength
      2. Compression Strength
      3. Hardness
      4. Density
      5. Damping Capacity
    2. Thermophysical Properties
      1. Specific Heat
      2. Thermal Conductivity
      3. Coefficient of Thermal Expansion
      4. Electrical Resistivity
    3. Gray Iron Chemistry
      1. Microstructure of Iron
        1. Phases of Iron
        2. Phase Diagram
        3. Graphite Morphology
      2. Cast Iron Composition
        1. Iron
        2. Carbon
          1. Carbon Equivalent
        3. Silicon
        4. Phosphorus
        5. Sulfur
      3. Recarburizers
    4. Grade Specifications
      1. ASTM Grades
      2. SAE Grades
  2. Gray Iron Processing and Defects
    1. Gray Iron Processing
      1. Inoculation
      2. Alloying
        1. Copper
        2. Nickel
        3. Tin
        4. Molybdenum
        5. Manganese
      3. Undercooling
      4. Carbide Dissolution
      5. Matrix Adjustment
    2. Gray Iron Defects
      1. Carbides
      2. Pinholes
      3. Shrinkage Porosity
      4. Slag and Dross

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