AISI 321 Stainless Steel Bar SUS321 1.4541

Composition and Characteristics

321 stainless steel is formulated with a precise blend of elements that contribute to its excellent performance in high-temperature environments. The typical chemical composition includes:

Chromium (Cr):17-19%

Nickel (Ni):9-12%

Titanium (Ti):5x(C%+N%) min, typically around 0.7%

Carbon (C):0.08% max

Manganese (Mn):2% max

Silicon (Si):1% max

Phosphorus (P):0.045% max

Sulfur (S):0.03% max

The addition of titanium in 321 stainless steel prevents the formation of chromium carbides at high temperatures, which can lead to intergranular corrosion. This stabilization allows 321 stainless steel to maintain its corrosion resistance and mechanical properties even after being exposed to elevated temperatures for prolonged periods.

Key Properties

321 stainless steel bar offers several key properties that make it an ideal material for demanding applications:

Superior High-Temperature Resistance:321 stainless steel is engineered to withstand prolonged exposure to high temperatures, making it suitable for environments where other stainless steels might fail. It can operate at temperatures up to 900°C (1652°F) without losing its structural integrity.

Excellent Resistance to Intergranular Corrosion:The addition of titanium prevents the formation of chromium carbides during welding or high-temperature exposure, ensuring that 321 stainless steel remains resistant to intergranular corrosion, which can be a problem in unstabilized grades like 304.

Good Mechanical Strength:321 stainless steel maintains its mechanical strength even at elevated temperatures, providing durability and reliability in applications that require both heat resistance and strength.

Weldability:321 stainless steel is highly weldable, making it suitable for fabricating complex components that require strong, corrosion-resistant welds.

Non-Magnetic in Annealed Condition:Like other austenitic stainless steels, 321 stainless steel is non-magnetic when annealed, which can be beneficial in certain applications where magnetism is undesirable.

Applications of 321 Stainless Steel Bar

321 stainless steel bar is widely used in industries that require materials capable of withstanding high temperatures and corrosive environments. Some of the most common applications include:

Aerospace Industry:321 stainless steel is used in the aerospace industry for components such as exhaust manifolds, jet engine parts, and thermal barrier systems, where high-temperature resistance is critical.

Chemical Processing:The material is ideal for use in chemical processing equipment, including heat exchangers, reaction vessels, and piping systems, where resistance to corrosive chemicals and high temperatures is essential.

Automotive Industry:321 stainless steel is commonly used in automotive exhaust systems, especially in high-performance vehicles, where its ability to withstand extreme heat and corrosion is crucial.

Power Generation:321 stainless steel is employed in power generation equipment, such as superheater tubes, boiler components, and heat exchangers, where its resistance to oxidation and high-temperature strength are necessary.

Industrial Heating Equipment:The alloy is used in the construction of industrial furnaces, heating elements, and other thermal processing equipment, where consistent performance under extreme heat is required.

Advantages of Choosing 321 Stainless Steel Bar

When selecting a material for high-temperature or corrosive applications, 321 stainless steel bar offers several compelling advantages:

High-Temperature Performance:321 stainless steel is specifically designed to maintain its structural integrity and resist oxidation even at extreme temperatures, ensuring long-term reliability in challenging environments.

Corrosion Resistance:The alloy’s resistance to intergranular corrosion, particularly after welding, makes it an excellent choice for applications that involve exposure to corrosive chemicals and high heat.

Durability:The combination of high strength, heat resistance, and corrosion resistance ensures that components made from 321 stainless steel bar have a long service life, reducing maintenance costs and downtime.

Versatility:From aerospace to automotive applications, 321 stainless steel bar is suitable for a wide range of demanding industries, offering both performance and reliability.

Conclusion

321 stainless steel bar is a high-performance material that delivers exceptional strength, durability, and resistance to corrosion and high temperatures. Whether you are working in the aerospace, chemical processing, or automotive industries, 321 stainless steel bar provides the reliability and performance you need for the most demanding applications. Explore our range of 321 stainless steel bars today and find the perfect solution for your high-temperature and corrosion-resistant needs.

Common surfaces

Stainless Steel Standards Comparison Table

More Stainless Steel Standards