AISI 3120 Nickel Chromium Steel Chemical Composition Properties, Grade, Table and Document

AISI 3120 is a nickel-chromium steel of low alloy content. It is particularly known for its high strength and excellent corrosion resistance. Its chemical pattern generally consists of 17-23% carbon, 66-80% iron, 2.5-3.5% manganese, 1-1.5% nickel, 1.5-2.5% chromium and small proportions of other elements including silicon and sulfur. This product is created out of a superior kind of mechanics which makes it eligible for use in several sectors such as aircraft and automobile. AISI 3120 is used in gear and shaft manufacture as well as components such as these must withstand high mechanical stress and abrasive wear. Tables and documents, in-depth, containing all grade specifications and properties, provide real and reliable guidance for engineering and manufacturing industries through material selection and optimal performance of applications in the production process.

AISI 3120 Alloy Steel Chemical Composition And Grade Table

AISI 3120 alloy steel is one of the most widely preferred material because of its top-notch strength and toughness and uses in so many places during different industries. Its chemical nature being made up by carbon, manganese, silicon, phosphorus, sulfur, chromium, nickel, molybdenum, and vanadium. The mixture has change in chemical constitution may be slightly different due to the manufacturing process and application. About the grading of AISI 3120 steel, it can be placed as one of the alloys steels in which these steels have properties such as mechanical ones that are very higher when compared to the metal carbon steels. It’s grade identify shows it’s specific composition and performance specification that are super spy on smartphone various and suitable personification with international standards.

AISI 3120 Alloy Steel Composition Table
Elements Fe Si S P Ni Mn Cr C
Min (%) - 0.2 - - 1.1 0.6 0.55 0.17
Max (%) Balance 0.35 0.04 0.04 1.4 0.8 0.75 0.22

Advantages and Disadvantages of AISI 3120 Nickel Chromium Steel


  • Good Hardenability: Capable of achieving high hardness through heat treatment.

  • High Strength: Very good strength properties across various applications.

  • Wear Resistance: Good resistance to wear and abrasion.

  • Machinability: Fairly good machinability compared to other alloy steels.


  • Susceptible to Corrosion: Requires proper care and maintenance to prevent corrosion.

  • Cost: May be higher priced than ordinary carbon steel.

  • Weldability Issues: May require preheating and/or post-weld heat treatment.

  • Complex Heat Treatment: Requires precise control during heat treatment processes.

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