AISI 317 is Austenitic Stainless Steel whose performance in corrosion resistance and strength at enhanced temperatures is simply exceptional. Usually its chemical composition contains Chromium, Nickel, Molybdenum, and other important factors producing its extraordinary performance under various harsh conditions- environmental or physical. Its chemical composition which is comprised of approximately 18% chromium, 11% nickel, and 3% molybdenum provides AISI 317 a remarkable corrosion resistance, especially in acidic or chloride-concentrated environments. This level has numerous practical uses and are adopted extensively by industries such as chemical processing, pharmaceutical, food processing, and marine engineering. Tables, charts and PDFs of AISI 317's properties, grades and specifications are commonly used by engineers and designers in selecting the appropriate material for the applications they are developing. With such careful choices, long lasting and reliable performance is guaranteed, even in the most adverse conditions.
AISI 317 is a well-known austenitic stainless steel alloy exhibiting outstanding corrosion resistance in a wide spectrum of environments. They have a chemical composition of chromium, nickel, molybdenum, and other elements such as nitrogen and manganese. The approximate ranges of composition are about 18-20% chromium, 11-15% nickel,3-4% molybdenum, including small percentages of other components. Such a combination gives AISI 317 a superior ability to withstand corrosive chemicals and high temperatures, thus, it can be used for chemical and pulp and paper processing as well as food processing equipment.
Elements | Fe | Cr | Ni | Mo | Mn | Si | N | C | P | S |
---|---|---|---|---|---|---|---|---|---|---|
Min (%) | 58 | 18 | 11 | 3.0 | - | - | - | - | - | - |
Max (%) | 68 | 20 | 15 | 4.0 | 2.0 | 0.75 | 0.1 | 0.080 | 0.045 | 0.030 |
Advantages:
Excellent Corrosion Resistance: AISI 317 is a kind of stainless steel, which has great performance in resisting corrosion in various environments of severe acidic or chloride subjection.
High Temperature Strength: This steel, therefore, will offer mechanical properties at the required high temperatures, making it ideal for applications that require high strength at high temperatures.
Ease of Fabrication: AISI 317 has good formability and weldability, and so it is suitable to be made into different parts or structures that requires forming without having to degrade the material.
Low Carbon Content: Due to the lower carbon component in AISI 317, the material is less affected by sensitization and intergranular corrosion, improving its corrosion resistance.
Hygienic Properties: Due to its non-glossy surface and strong anti-corrosiveness, AISI 317 is ideal for industries that are confined to high sanitary standards like the food processing industries and the pharmacy industries.
Disadvantages:
Cost: For example this AISI 317 stainless steel may be costly more than other stainless steel materials depending on the project size and design or even when compared to 304, 316A, B etc.
Magnetic Properties: Although AISI 317 does not possess magnetic characteristics when in the annealed states, it can be found to possess certain level of magnetization when subjected to cold working or some certain process of fabrication.
Limited Availability: AISI 317 may not be as commonly stocked as other types of stainless steels and thus might entail more time to source or add extra costs in some countries.
Sulfur Sensitivity: AISI 317 stainless steel is susceptible to germs of hydrogen and sulfur which may allow localized corrosion in processes.
Chloride Stress Corrosion Cracking: AISI 317 steel is well resistant to chloride corrosion but remains susceptible to stress induced corrosion cracking in situations where chloride deposits exist particularly at high temperatures.
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AISI 317 stainless steel contains 18-20% chrome, 11-15% nickel, 3-4% molibdenum and other elements in minor quantities including carbon, manganese, silicon, phosphor, sulfur and nitrogen.
AISI 317 stainless steel is commonly found in ASTM A240, ASTM A276, ASTM A479 and other similar standards that outline its chemical make-up, mechanical characteristics, and proper usage.
The AISI 317stainless steel provides enhanced protection against corrosion in a broad range of environments, better tensile and creep strength at raised temperatures, and reasonable formability and weldability.
The AISI 317 stainless steel is typically applied in chemical processing, pulp and paper, food processing, pharmaceutical as well as the marine sectors because of its endurance of corrosive conditions.