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AISI 321 Stainless Steel Chemical Properties, Grades, Table and Online Pdf

AISI 321 Austenitic Stainless Steel is famous for its impeccable corrosion resistance and high-temperature strength as it is known as the choicest of materials for numerous industrial applications. It is made up primarily of iron, chromium, and nickel with additions of titanium. The material is considered to have a good resistance to the intergranular corrosion, oxidation and the carbide precipitation during welding. The chemical composition of it is said to be 17-19% chromium, 9-12% nickel and 0.08% carbon, on average. The Grade 321 produces better creep and stress rupture properties compared to 304 austenitic stainless steel and thus it can be used for the environments that involve elevated temperatures. Most engineers and manufacturers work with AISI 321 that involves the use of comprehensive charts and PDF documents that provide information such as properties and grades that aid in material selection and application-specific requirements.

AISI 321 Austenitic Stainless Steel Chemical Composition And Grade Table

AISI 321 is austenitic stainless steel alloy with a but little corrosion resistance even in the high-temperature operation. The chemical structure is seemingly made up a combination of elements, such as chromium, nickel, and titanium. In general, it consists of approximately 17% chromium, 9-12% nickel, and 0.08% carbon. Additionally, titanium is added in concentrations of 0.5 to 1%, which enables the material to be welded without going through sensitization. Due to the composition of AISI 321, it is resistant to intergranular corrosion and oxidation. Therefore, it is widely used in different industries, including spacecraft manufacturing, chemical processing, and motor vehicle building.

AISI 321 Austenitic Stainless Steel
Elements C Mn Si P S Cr Ni N Other
Min (%) - - - - - 17.0 9.0 - Ti=5(C+N)
Max (%) 0.08 2.00 0.75 0.045 0.030 19.0 12.0 0.10 0.70

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