AISI 8620 Alloy Steel Chemical Properties, Grade, Charts and Online Pdf

AISI 8620 alloy steel is a very adaptive material that is highly regarded for its remarkable strength and enduring toughness. In the composition of its chemical components, there is a presence of such elements like carbon, manganese, chromium, nickel, and molybdenum among others, it has the ability to provide a longer and hard all along the carburization of the steel in the spheres of the surface and wear resistance. This carbon steel with high tensile strength refers to alloy steel and is mainly applicable for cases, where high rigidity is needed and teeth are involved, such as gears, shafts, and automotive parts. The material's welding behavior and easy machinability promote it as the one-stop-solution in manufacturing industry. More detailed charts and online PDFs or guides could be made available, providing information on its mechanical properties, heat treatment advices and application fields. Due to this, AISI 8620 alloy steel will be incorporated into production engineering reports and producers will be able to work out the optimum operational parameters.

AISI 8620 Alloy Steel Chemical Composition And Grade Table

Alloy 8620 steel, with unmatched carburizing properties, can well serve as an ideal material for the engine block which is engineered for automotive, aviation and machinery purposes. The chemical make-up of steel is mainly constituted by carbon, manganese, silicon, phosphorus, sulfur, chromium, nickel, molybdenum along with traces of other elements being present in lesser quantities. However, the particular combination of abrasion resistance, low friction coefficient, and toughness makes those requisites of high quality coatings hard to meet. In the grade table, AISI 8620 is normally referred to as a low alloy steel, having a good response to heat treatment, as well as good machine ability, when corrected by heat treatment. Its versatility and reliability in multiple performance factors make it a favorite choice for the engineering assemblies.

AISI 8620 Alloy Steel Composition Table
Elements Iron, Fe Manganese, Mn Nickel, Ni Chromium, Cr Carbon, C Silicon, Si Molybdenum, Mo Sulfur, S Phosphorous, P
Min (%) 96.895 0.7 0.4 0.4 0.18 0.15 0.15 - -
Max (%) 98.02 0.9 0.7 0.6 0.23 0.35 0.25 ≤ 0.0400 ≤ 0.0350

Advantages and Disadvantages of AISI 8620 Alloy Steel


  • Good Weldability: Can be welded with appropriate measures to protect the surface.

  • Machinability: Offers good machining qualities, especially when properly annealed.

  • Strength and Toughness: Provides good strength and toughness after heat treatment.

  • Cost-effective: Reasonably priced compared to some other alloy steels.


  • Limited Hardenability: Cannot be hardened to high levels across large areas.

  • Surface Hardness: Requires good control during heat treatment to achieve desired surface hardness.

  • Susceptible to Decarburization: Surface scaling can affect properties if heat treatment is inadequate.

  • Impact on Weld Quality: Weld quality depends on welding process and control.

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