00Cr18Ni15Si4(Nb) physical properties

SUS321

SUS321 is a stainless steel type with a titanium component added to Type 304 to enhance its intergranular corrosion resistance. It is also called grade 321 stainless steel. It is basically a combination of two materials, one being 18 percent chromium and the other being 8 percent nickel. Addition of titanium further enhances its corrosion resistance qualities and makes it superior to Type 304.

physical properties

Melting point: 1454 °C

Density: 7.9 g/cm3

Youngs modulus: 205 GPa

Yield strength: 275 MPa

Tensile strength: 520-640 MPA

Elongation: 20-30%

Hardness: HV 350

SUS321 is an austenitic stainless steel with relatively high silicon content that prevents stability by sigma phase at around 550°C. Its superior intergranular corrosion resistance is enhanced by the addition of titanium, which is about 5 times that of Type 304 stainless steel. Its toughness and ductility means it has better formability than Type 304. It is commonly used for elevated temperature applications.

Applications

SUS321 is commonly used in the food and chemical industry due to its high corrosion resistance, especially in highly corrosive environments. It is also frequently used in medical and dental applications due to its high level of anti-microbial capability. It is also popular in the aerospace and automotive industries, thanks to its ability to maintain strength at higher temperatures and humidity levels.

Other uses of SUS321 include its use as a component in welded parts and in turbine blades. It is also used in petrochemical plants, oil refining, and in the manufacture of pharmaceutical and medical products.

Due to its high corrosion resistance, SUS321 can also be used for industrial and domestic water piping in highly corrosive environments.

Conclusion

SUS321 is a stainless steel type characterized by its superior corrosion resistance, toughness, and ductility. Its content features 18% chromium and 8% nickel, with titanium added for enhanced intergranular corrosion resistance. This makes SUS321 an ideal choice for applications where corrosion resistance is necessary, like the food processing and chemical industries. It is also used for aerospace and automotive components, as well as for petrochemical plant parts and components. Its ability to maintain its strength even at higher temperatures and humidity levels make it the perfect choice for such applications.

S30408( 0Cr18Ni15Si4 (Nb)) stainless steel is a highly alloyed austenitic stainless steel, which is mainly used in the refining industry, mainly used in the production of petrochemical equipment, such as petrochemical pipes, acid-holding tanks, reactors, and desalination systems, which require high corrosion resistance. Especially chloride stress corrosion cracking resistance.

The chemical composition of S30408 stainless steel is as follows: C≤0.08, Mn≤2.00, P≤0.045, S≤0.030, Si≤1.00, Cr17.00-19.00, Nb≤3.50, Ni and balance.

S30408 stainless steel has the following characteristics:

1.The corrosion resistance of S30408 stainless steel is highly superior to 304 stainless steel, and it is suitable for use in equipment and components that require high corrosion resistance in harsh and diverse environments.

2.The material has excellent metallurgical properties and weldability. It can be welded by ordinary materials and processes such as manual welding and automatic welding.

3. In addition to excellent corrosion resistance, S30408 stainless steel also has high temperature strength and oxidation resistance.

4.The material is suitable for use in hot and cold water systems, reactors and parts that require high corrosion resistance and high temperature resistance.

5.The low intergranular corrosion resistance of the material provides greater safety.

In conclusion, due to its strong corrosion resistance and excellent overall performance, S30408(0Cr18Ni15Si4 (Nb)) stainless steel is widely used in not only the petrochemical industry, but also in seawater desalination plants, industrial piping, papermaking and pharmaceutical applications.