SUS 321H is a modified version of the standard SUS 321 alloy, with higher carbon content, which improves its high-temperature strength. SUS 321H Pipes are widely used in industries like chemical processing, petrochemical, power generation, and more, where both resistance to corrosion and high temperature stability are required.
SUS 321H consists primarily of iron, with chromium (17% - 19%) and nickel (9% - 12%) as its main alloying elements. The higher carbon content (up to 0.04% - 0.10%) compared to the standard 321 alloy provides enhanced resistance to carbide precipitation during welding, making it ideal for use in high-temperature conditions. The addition of titanium (5 times the carbon content) helps stabilize the alloy against sensitization and intergranular corrosion, which is a common issue in high-temperature applications. This unique composition makes SUS 321H one of the most reliable stainless steel alloys for resisting oxidation and scaling in elevated temperature environments.
SUS 321H pipes and tubes are known for their exceptional properties, making them ideal for critical industrial applications. Below are some of the standout features:
High-Temperature Resistance: SUS 321H has a high resistance to oxidation and scaling at temperatures up to 870°C (1600°F) in intermittent service and up to 925°C (1700°F) in continuous service.
Corrosion Resistance: SUS 321H exhibits excellent resistance to a variety of corrosive environments, including those found in high-temperature and acidic conditions. The alloy is highly resistant to sulfuric, phosphoric, and other organic acids, making it suitable for industries like chemical processing.
Mechanical Properties: SUS 321H offers high strength and good mechanical properties, even in elevated temperature environments. It has good tensile strength, high fatigue resistance, and can withstand pressure and stress over extended periods.
Weldability: Due to its titanium stabilization, SUS 321H is highly resistant to weld decay (sensitization), making it an excellent choice for welded components. This feature makes it suitable for the fabrication of pipes and tubes that require welding in high-temperature applications.
Formability: SUS 321H is easy to form and fabricate into pipes, tubes, and other shapes, thanks to its excellent ductility and workability. It can be rolled, drawn, and shaped into different forms, making it versatile for various industrial uses.
SUS 321H pipes are used in a variety of high-temperature and corrosive applications. Some of the most common sectors that rely on this alloy include:
Chemical and Petrochemical Industries: SUS 321H is used in heat exchangers, reactors, and other equipment where exposure to high temperatures and corrosive chemicals is common. Its resistance to oxidation and scaling is essential in these applications.
Power Generation: In power plants, SUS 321H pipes are used in boiler tubes, superheater tubes, and other parts of the plant that are exposed to high heat and pressure. The alloy's ability to maintain strength and resist corrosion under such conditions makes it a preferred choice.
Aerospace and Aviation: Due to its high strength and resistance to thermal expansion, SUS 321H is used in the aerospace industry for turbine engines, exhaust systems, and other parts that operate at high temperatures.
Food Processing: SUS 321H is used in the food industry for equipment that needs to withstand high temperatures and contact with acidic foods. Its corrosion resistance makes it a good choice for food handling and processing systems.
Automotive and Marine Industries: Exhaust systems, catalytic converters, and components exposed to high temperatures often make use of SUS 321H pipes and tubes for their excellent thermal stability and corrosion resistance.
For industries seeking reliable and high-quality SUS 321H pipes, Leoscor Alloy Pipes is one of the leading suppliers in India. Leoscor Alloy Pipes offers a wide range of SUS 321H pipes and tubes tailored to meet the demands of various industries. Leoscor Alloy Pipes is the leading SUS 321H Pipes Suppliers in India, that offers high quality products at best prices. The company specializes in providing stainless steel pipes that comply with international standards, ensuring excellent durability and reliability. Their pipes come with certifications, ensuring that they meet all the required specifications for high-temperature and corrosive environments.
Whether you require standard dimensions or customized sizes, Leoscor Alloy Pipes can cater to specific project needs and deliver on time. Their expertise in stainless steel pipe manufacturing, coupled with a commitment to quality and customer satisfaction, makes Leoscor Alloy Pipes a trusted name in the Indian market for SUS 321H pipes.
SUS 321H pipes are indispensable in industries requiring materials that can withstand high temperatures, corrosion, and mechanical stress. The unique composition of this alloy, combined with its high-temperature stability and corrosion resistance, makes it a top choice in critical applications such as chemical processing, power generation, and aerospace. In India, Leoscor Alloy Pipes stands out as a key supplier of SUS 321H pipes, offering reliable products that meet the highest standards. As industries across India continue to expand, the demand for high-performance materials like SUS 321H will only increase, making it a key player in the industrial supply chain.
Contact Leoscor Alloy Pipes for best prices for your project now.