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A Complete Guide to Super Duplex Round Bar

A Complete Guide to Super Duplex Round Bar
When choosing the right material for your industrial or construction projects, super duplex round bars are one of the most popular choices, and rightly so. They offer resistance to corrosion, good mechanical properties, and high strength. However, choosing the right product for your application is challenging. This complete guide provides all the information you need to choose the right Super Duplex Round Bar for your application.

What is Super Duplex Round Bar?

Super duplex stainless steel is a type of stainless steel with a high level of chromium, molybdenum, and nitrogen content. It’s called “super” because it has better mechanical properties and higher corrosion resistance than a standard duplex. They are highly resistant to pitting and crevice corrosion in highly corrosive environments.

Types of Super Duplex Round Bar

The most commonly used super duplex round bar is S32750 or F53. It comprises 25% chromium, 7% nickel, and 3.5% molybdenum. Another popular type is S32760, which is also known as F55. It has a higher % chromium content, 25% nickel content of 9%, and 3.5% molybdenum.

Properties of Super Duplex Round Bar

The high chromium content gives excellent corrosion resistance against various environments, such as chloride-rich media and acidic conditions. It has an ultimate tensile strength that exceeds 1-1/2 times that of other grades, making it ideal for applications requiring extreme strength, such as downhole components in the oil and gas industry. They can be easily cold formed into complex shapes while maintaining good mechanical properties compared to standard austenitic grades. Typically welded without preheating owing to its low carbon content and high chromium content, they offers superior weldable characteristics over more conventional stainless steels with little or no risk of intergranular oxidation or cracking at the fusion line

Applications of Super Duplex Round Bar

Various industries, including oil and gas, chemical processing, marine, pulp and paper, and other industrial applications, use it. It is a common choice for producing pipelines, heat exchangers, flanges, valves, pumps, and other components. It is often used in the oil and gas industry for subsea components due to its excellent corrosion resistance. The aerospace industry also uses super duplex round bars to produce aircraft components because of their high strength and lightweight properties.


They are an excellent choice for applications that require high strength, excellent corrosion resistance, and good mechanical properties. Choosing the right product for your application can be challenging, but you can make an informed decision by understanding the types, properties, and applications of super duplex round bars. This guide has helped give you the information you need to choose the right super duplex round bar for your next project.


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