What is a Super Duplex Steel

Due to their unique mix of strength, corrosion resistance, and cost-effectiveness, super duplex stainless steels are well-suited to the production of fasteners for industrial applications.

Duplex stainless steels combine the best qualities of austenitic and ferritic stainless steels, including high strength and toughness, ease of manufacture, and corrosion and stress corrosion cracking resistance.

Super Duplex pipeline supplies are suited for onshore and offshore oil and gas applications due to their strong corrosion resistance. For additional information on the consequences of Super Duplex pipes, please visit our industrial pages.

Is the Super Duplex different from Duplex 

Stainless steels are classified into different classes based on the microstructural phases in which they exist. While each class has its own microstructural phase, stainless steels in the duplex category have a microstructure that is comparable to those of two other classes: ferritic and austenitic stainless steels. The microstructure of duplex stainless steel is austenite and ferrite combined. Both of these crystalline structures have an equivalent ratio, hence duplex steels have a 50/50 mix of austenite and ferrite. There are three more subcategories of duplex stainless steel, one of which being super duplex stainless steel.

Because of this, super duplex grades have a dual microstructure as well. The PREN, or pitting resistance equivalent number, values of duplex grades are extremely high. The range of these numbers is 22 to 45. The super duplex kind of stainless steel outperforms the other two duplex types in terms of corrosion resistance. PREN values for super duplex grades range from 38 to 45. The chemistry of these stainless steel grades is highly alloyed, much more so than any other stainless steel alloy, such as grade 304 or even 316. Because they are extensively alloyed, they have a higher level of corrosion resistance.

They have great mechanical strength as well. Although the highly alloyed nature of these stainless steel alloys provides strength and corrosion resistance, it also makes super duplex steel grades more complex to process. Furthermore, higher levels of elements like chromium, nickel, molybdenum, nitrogen, and even tungsten make the creation of intermetallic phases much easier. The impact resistance of the super duplex stainless steel variant is drastically reduced as a result of these intermetallic phases. This is why customers should work with manufacturers or suppliers who are not just knowledgeable but also capable of delivering high-quality goods. When either stainless steel grade is made incorrectly, the ultimate product will perform poorly.  

Super Duplex Steel S32750 / S32760 Fasteners

Prashaant Steel and Alloys’ Super Duplex steel Fasteners are a commonly utilized product with a very broad platform. To service the client, we offer the goods while maintaining the highest level of quality. We also created a very cost-effective product that can compete in both domestic and foreign markets. These kinds of super Duplex stainless steel fasteners are utilized when applications require excellent corrosion resistance and strength. They are made of nitrogen, molybdenum, and chromium, and provide excellent resistance to crevice corrosion and chloride pitting. 

Super Duplex Steel S32750 / S32760 Fasteners have a metallurgical microstructure that is made up of a 50-50 combination of ferrite and austenite steels. Physical and superior mechanical features such as strong yield strength, outstanding tensile strength, high impact strength, and excellent corrosion resistance are some of the advantages of employing these fasteners. Because of its superior physical and mechanical features, Super Duplex Steel Fasteners have the ability to meet the high demands imposed by the gas, oil, and marine industries. It possesses the ideal ratio of molybdenum to chromium, making it very resistant to widespread corrosion. 

Our high-grade Fasteners are made up of a variety of metals and qualities that are necessary for each application. Chromium, nickel, and molybdenum are all included in Super Duplex S32750/S32760. These metals are resistant to corrosion in crevices, oxidation, and chloride pitting. This alloy can be used in a variety of acidic conditions. Great tensile strength, exceptional finish, outstanding resistance to pitting and crevice resistance, high workability, and durability are all features of our high-grade Super Duplex Steel Fasteners. 


To ensure quality and long service life, Prashaant Steel and Alloys fabricates Super Duplex S32750/S32760 Fasteners from pure alloys. To avoid flaws and errors, our team of expert professionals thoroughly inspects and tests the entire manufacturing process. Fasteners are inspected at every stage of production, ensuring attributes such as yield and tensile strength, strong weldability, robust construction, low maintenance, and long service life. Visit our website for more details.

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