AISI 8645 Alloy Steel Chemical Properties, Grades, Table and PDF Online

AISI 8645 is a low-alloy steel with excellent strength in the entire strength range up to 86 ksi. The chemical composition of a quality raw steel consists of a balanced mix of carbon, manganese, silicon, chromium, nickel, and molybdenum, which serve to give it strength and resilience against wearing out. The grades within the AISI 8645 welding offer customized applications for sectors like the automotive, defense, and medical. Changling Quality in Engineering and Manufacturing, this alloy offers high strength and easy-machining properties for critical components including gears, shafts, and axles. Wide range of tables about its mechanical properties, recommendations for thermo treatment, and relevant grades as well as this information can be uploaded on the Internet for powerful tools of engineers and hobbyists. Table, chart and PDF documents become the source papers which are accessible to anyone who needs to base the decisions on alloy steel selection and application.

AISI 8645 Alloy Steel Chemical Composition And Grade Table

AISI 8645 happens to be a low carbon steel which is known for its exceptional strength and toughness. Therefore, the chemical composition of steels often consists of elements like carbon, manganese, silicon, chromium, nickel, molybdenum, and in some cases also vanadium. They are in charge of these characteristics that are responsible for its great mechanical properties which make it be interesting for those applications which demand high tensile strength and wear resistance. The designation AISI 8645 is most often a context for the structural parts with a principal application in the gear, shaft and axle manufacture in the machinery and automotive industries. It is an alloy steel, which achieves a balance between strength, wear resistance, and machinability.

AISI 8645 Alloy Steel Composition Table
Elements Iron, Fe Manganese, Mn Carbon, C Nickel, Ni Chromium, Cr Silicon, Si Molybdenum, Mo Sulfur, S Phosphorous, P
Min (%) 96.595 0.75 0.43 0.4 0.4 0.15 0.15 - -
Max (%) 97.72 1 0.48 0.7 0.6 0.3 0.25 ≤0.040 ≤0.035

Advantages and Disadvantages of AISI 8645 Alloy Steel

    Advantages:

  • Versatile: Suitable for a wide range of applications due to its moderate elemental qualities.

  • High Strength: Offers excellent strength and tough characteristics.

  • Machinability: Has good machinability, especially when heat treated.

  • Cost-effective: Relatively low cost compared to high-performance alloys.

    Disadvantages:

  • Limited Hardenability: May have limitations in achieving desired hardness depths.

  • Weldability Issues: Can be difficult to weld if proper safety measures are not observed.

  • Corrosion Resistance: Moderately resistant to corrosion, but susceptible in harsh environments without surface protection.

  • Specific Heat Treatment Required: Requires precise heat treatment for optimal mechanical properties.

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