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AISI 308L Stainless Steel Chemical Properties, Grade, Charts and Document

AISI 308L is the austenitic stainless steel known as, an alloy, which distinguishes itself as very resistant to corrosion, making it suitable for numerous industrial applications. Chromium, nickel, and a low carbon content of about 0.03% form its chemical composition with a headcount of around 18% and up to 10%. Such coating protects metallic items in aggressive environments, for instance, those with corrosive elements and high temperature fluctuations. AISI 308L is commonly used in an area which the welding ability and corrosion resistance are targets. A wide range of application sectors like chemical processing equipment, heat exchangers and furnace parts are the most common examples of this use. Its quality is controlled by the American Iron and Steel Institute (AISI) with all grades continously tested and checked to confirm that is maintains uniform performance. Chart and PDF outlining the relevant characteristics and specifications are in the appendix for reference purposes and for the purpose of giving help how to use it.

AISI 308L Austenitic Stainless Steel Chemical Composition And Grade Table

AISI 308L is a special steel austenitic in nature which is considered very well for corrosion resistance. As such, it is suitable for many usages in the fields of chemical industry, petrochemical industry and food processing. Its chemical constitution comprises approximately 18% chromium and 10% nickel with the low carbon content enhancing weldability and preventing sensitization as well. The metal alloy of this grade is characterised by superior oxidation and scaling resistance at temperatures above tempeature, as well as acceptable mechanical characteristics. AISI 308L is a representative of the austenitic stable class that is frequently used in welding applications for its low risk of intergranular corrosion and excellent performance in the aggressive environments.

AISI 308L Austenitic Stainless Steel
Elements Fe Cr Ni Mn Si C P S
Min (%) 63.8 19.5 9.0 1.0 0.25 - - -
Max (%) 70.5 22 11 2.5 0.6 0.080 0.030 0.030

The Advantages and Disadvantages of AISI 308L Austenitic Stainless Steel

    Advantages:

  • Corrosion Resistance: Has good resistance to corrosion, in particular in acids and chloride environments.

  • Weldability: Featuring ease of joining allocates it for different production methods.

  • High Temperature Performance: Keeps its mechanical characteristics unchanged at raised temperatures and so is a good fit for high temperature applications.

  • Formability: Exhibits a good capability for formability, making it possible to mold and manufacture different shaped products.

  • Stability: Austenitic form remains even after exposure to extreme temperatures still ensures the long-term durability of the material.

    Disadvantages:

  • Cost: Generally the expensive one among other stainless steels that include a higher nickel content.

  • Sensitization: Can be sensitized in some conditions due to the loss of passivity and reduced corrosion resistance.

  • Lower Strength: As opposed to other stainless steel alloys specifically AISI 308L may exhibit relatively lower strength properties.

  • Limited Hardness: Not suitable in the applications which have hung the demand for hardness or wear resistance.

  • Potential for Intergranular Corrosion: May be susceptible to intergranular corrosion in some specific conditions that are not treated or used wisely.

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