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AISI 308 Stainless Steel Chemical Properties, Grades, Charts and PDF Online

AISI 308, an austenitic steele that is commonly known for its highest resistance to corrosion and heat strength in high temperatures. Made up primarily by iron, chromium and nickel with some trace amount of manganese, silicon, phosphorous, sulfur and carbon as well. The balanced interest among these elements makes up an ideal welding material, which has multiple applications such as those of furnace parts and heat exchangers in the industry industries and the chemical processing tools. The AISI 308 offers exceptional protection against oxidation and scaling while sustains thermal exposure in the harsh environments, thus, ensures durability in demanding circumstances. It remains proof of high-quality and reliability but meets internationally recognized standards. Flow charts and PDFs supply the engineers and manufacturers with the detailed chemical composition which enables their precise material selection and application worth checking their expected durability, consequently, strengthening the performance and quality of the products.

AISI 308 Austenitic Stainless Steel Chemical Composition And Grade Table

AISI 308 is a chosen austenitic stainless steel that can be recommended as an option due to the fact that it has both excellent corrosion resistance and high strength at high temperatures. Usually chromium amounts to approximately 20% and nickel 10% in addition to a small amount of manganese, silicon, carbon, phosphorus, sulfur, and iron. This alloy belongs to the group 308 stainless steels with the broadest application options throughout the automotive, aerospace and constructions sectors. This table of grades shows vital data needed by engineers and manufacturers to choose the correct material for their products.

AISI 308 Austenitic Stainless Steel
Elements Fe Cr Ni Mn Si C P S
Min (%) 64.1 19 10 - - - - -
Max (%) 71 21 12 2.0 0.75 0.080 0.045 0.030

The Advantages and Disadvantages of AISI 308 Austenitic Stainless Steel

    Advantages:

  • Corrosion Resistance: Being endowed with an extraordinary resistance to corrosion, AISI 308 can be well fitted for be applied in number of atmospheres where it can get in touch with chemical reagents and sea water.

  • High Temperature Resistance: It can keep its stable and undamaged at highly elevated temperatures so it may be used in applications that need to withstand the heat.

  • Weldability: AISI 308 has good weldability characteristics, making it easy to use fabrication and welding methods while retaining its mechanical properties.

  • Formability: Use this grade of stainless steel, it is an acolyte for the industry, able to shape it for all these complex geometry and structures with absolute ease.

  • Ductility: AISI 308 displays high ductility thus being a good candidate for applications that require bending and shaping due to the fact that it can undergo elongation without the risk of fracture.

    Disadvantages:

  • Sensitization: AISI 308 has the potential of sensitization, which makes it vulnerable to intergranular corrosion in some regions, especially when heated. The process takes place after exposure to high temperatures.

  • Lower Strength: Compared to some other stainless steel grades, AISI 308 does not offer a higher mechanical property and consequently, may not be used in applications that require high strength.

  • Cost: Austenitic stainless steels, which include AISI 308 type steel, have a higher cost than other types of steel, so this may affect the overall budget of a project.

  • Magnetism: It showed low magnetic permeability which could be a problem in the applications where magnetic characteristics are of particular interest.

  • Surface Finish: Getting a perfect surface finish with AISI 308 may prove difficult given the fact that the surface can work-harden during machining processes. to maintain the surface from defects during machining you have to be very careful.

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