Advantages And Uses Of SUS321

Advantage:

High Temperature Stability: SUS321 contains titanium (Ti) which gives it excellent performance at high temperatures. The presence of titanium stabilises grain boundaries, reducing the risk of sensitisation and grain boundary corrosion at high temperatures. This makes SUS321 very suitable for applications in high temperature environments.

Resistance to sensitisation: The addition of titanium makes SUS321 less susceptible to sensitisation, which is key to avoiding grain boundary corrosion at high temperatures. This stability is critical to maintaining the corrosion resistance of the material during welding and machining.

Corrosion Resistance: Similar to other austenitic stainless steels, SUS321 has good corrosion resistance. This makes it suitable for a range of corrosive environments, and it particularly excels in mild corrosive environments.

Uses:

Heat exchangers: Due to its high temperature stability and corrosion resistance, SUS321 is used in heat exchangers, which are required to operate at high temperatures and in corrosive media.

Aircraft components: SUS321 is used in components such as exhaust systems of aircraft engines where high temperatures and corrosive gases are present.

High Temperature Processing: Chemical, petrochemical and power generation industries choose SUS321 stainless steel when they need to use equipment in high temperature and potentially corrosive environments.

Welding Applications: The titanium stability of SUS321 helps prevent sensitisation during welding and reduces the risk of grain boundary corrosion in welds.

Food Processing Equipment: SUS321 is used in food and beverage processing equipment where both corrosion resistance and high temperature stability are required.

Automotive applications: SUS321 is also used in automotive applications involving high temperature exhaust systems.