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Does 321 Stainless Steel Rust?
Stainless steel 321 offers excellent intergranular corrosion resistance. 321 stainless steel is stabilized against chromium carbide formation by adding titanium. As stainless steel does not rust and has excellent corrosion resistance, it is suitable for applications requiring short-time heating or welding. It is suitable for high-temperature applications since it also has amazing mechanical properties. SS321 provides high creep as well as stress rupture properties compared to other stainless steel grades.Applications
Common type of applications that uses stainless steel 321 is furnace parts, heat exchangers, expansion joints, welded screens, heating element tubing, burner pipes, aircraft exhaust manifolds, etc.
Corrosion Resistance
Stainless steel 321 provides resistance to overall and general corrosion. It is mainly developed for applications where other types of stainless steel, such as unstabilized chromium-nickel steels, do not have intergranular corrosion-resistant power.
What is Grade 321 Stainless Steel?
Stainless steel is available in different specifications and grades based on different industrial needs. 321 stainless steel is no different and comes into the category of austenitic stainless steel as it is a stabilized form of titanium steel which is highly resistant to corrosion. Intergranular corrosion mainly occurs at adjacent zones or grain boundaries with no attack or little attack on the grain. Stainless steel grade 321 is known for intergranular corrosion resistance along with high temperature and resistance nature; therefore, it is an ideal choice for industries like heat exchangers and chemical and power plant industries. The high creep as stress rupture properties of the stainless steel grade 321 benefit boilers and pressure vessels the most. Because of its intergranular corrosion resistance and high-temperature corrosion resistance, it is used in the following industries
Aircraft Petrochemical Oil and Gas Mining Defense Construction Heat Exchangers Nuclear Power Plants etc.
How is Stainless Steel 321 Made?
Stainless steel 321 grade cannot be hardened by heat treatment, and cold working only works for this grade, and post-weld annealing is not required for grade 321. It is ductile and can be formed easily. SS 321 pipes cannot be hardened or rolled by giving heat treatment, and cold treatment can be used only for manufacturing 321 pipes The best thing about stainless steel 321 grade is that it works in severe or extreme conditions. Still, it is not ideal to use in a situation where chloride material is present.
Properties of the Stainless Steel Grade 321
This grade also comprises excellent low-temperature toughness and resists oxidation to high temperatures up to 1500 degrees Fahrenheit. 321 stainless steel grade is an excellent choice for food processing storage and equipment since it is rust-free, environmentally friendly, and provides flavor protection. It has intergranular corrosion resistance, the capacity to withstand high temperatures, and results in ease of cleaning. So it is an ideal choice for food processing equipment and storage. This grade is used in areas that require sanitation. 321 stainless steel plate has a massive film that protects the surface against bacterial growth and contamination. The structural integrity of 321 stainless steel grade is maintained because of its high intergranular corrosion-resistant nature. It can withstand high oxidation and temperature along with creep and rupture properties. It is an ideal metal for industries like food processing equipment and storage, where high temperature and sanitation are the key.