SUS 321 is a stainless steel material whose chemical composition mainly includes iron (Fe), chromium (Cr), nickel (Ni), titanium (Ti) and a small amount of other elements. Here is a detailed analysis of these elements:
Iron (Fe): As the main component of SUS 321, the mass proportion of iron is usually between 60-75%.
Chromium (Cr): Chromium is the second largest component of SUS 321, and its mass proportion is between 17-20%. The presence of chromium enhances the corrosion resistance of stainless steel, especially in high temperature and strong acid environments.
Nickel (Ni): Nickel is another important component in SUS 321, its mass proportion is between 9-13%. The addition of nickel not only enhances its heat resistance but also improves its oxidation resistance.
Titanium (Ti): Titanium is one of the key components of SUS 321, and its mass proportion is between 0.4-0.6%. Titanium exists as a stabilizing element, effectively controlling the formation of chromium carbide, giving SUS 321 better resistance to intergranular corrosion and high temperature strength.
In addition, SUS 321 also contains small amounts of elements such as silicon (Si), manganese (Mn), phosphorus (P), sulfur (S) and carbon (C). The contents of these elements are controlled within a certain range to ensure the performance and stability of SUS 321 stainless steel.
SUS321 stainless steel has good strength performance, and its yield strength range is generally between 205MPa and 515MPa. Specifically, its tensile strength σb ≥ 520Mpa and yield strength σ0.2 ≥ 205Mpa. These strength properties allow SUS321 stainless steel to perform well in a variety of application scenarios, such as the manufacture of wear-resistant acid vessels, linings for wear-resistant equipment, and transportation pipelines.
SUS321 stainless steel is widely used in many fields due to its excellent heat resistance, corrosion resistance and high strength. The following are some main application scenarios:
Energy field: Due to its excellent heat resistance and corrosion resistance, SUS321 stainless steel is widely used in nuclear power, petroleum, chemical industry and other fields. In these fields, it can be used to manufacture key equipment such as nuclear reactor pressure vessels, oil pipelines, and chemical reactors.
Aerospace field: The heat resistance, corrosion resistance and high strength of SUS321 stainless steel make it extremely important in high temperature and high pressure environments. For example, it is often used to manufacture parts for high-performance equipment such as aircraft engine exhaust systems, turbine blades, and rocket engines.
Medical field: The high-temperature strength of SUS321 stainless steel can ensure long-term stable mechanical properties without causing adverse reactions, so it has important applications in medical device manufacturing. It is often used in the manufacture of medical equipment and instruments such as surgical instruments and artificial joints.
Construction field: In the construction industry, SUS321 stainless steel can be used to manufacture structural parts and decorative parts of bridges and high-rise buildings. Its corrosion resistance can effectively resist corrosion in harsh environments and ensure the stability and safety of building structures.
Food processing field: Due to its easy cleaning and corrosion resistance, SUS321 stainless steel is also widely used in the food processing field. It can be used to manufacture food processing equipment and containers to ensure hygiene and safety during food production.
In addition, SUS321 stainless steel also has broad application prospects in other high-end fields, such as nuclear magnetic resonance systems, semiconductor manufacturing equipment, high-end automotive parts, etc.