Super duplex stainless steels

What is Duplex Stainless Steel?

Duplex Stainless Steel is a highly specialised material. It is named a “duplex alloy” because its microstructure combines two different types of grain structures – austenitic and ferritic.

It typically contains higher levels of chromium and molybdenum compared to standard stainless steel, along with additions of nitrogen. This special blend not only enhances its strength but also significantly improves its resistance to corrosion.

Duplex Stainless Steels Grades

Renowned for their remarkable combination of strength and corrosion resistance, with various grades offering distinct properties for specific applications.

Lean Duplex: This grade is known for its lower alloy content compared to other duplex steels. While it offers less corrosion resistance than the higher grades, it compensates with higher strength than standard austenitic stainless steels and excellent cost efficiency.

Standard Duplex: Representing a balance between cost, strength, and corrosion resistance, standard duplex stainless steels are well-suited for a variety of applications. They contain more alloying elements than lean duplex, providing better resistance to corrosion and greater strength.

Super Duplex: With even more chromium, molybdenum, and nitrogen than standard duplex, this grade offers excellent resistance to pitting and crevice corrosion, making it suitable for highly corrosive environments, such as those encountered in the marine and chemical processing industries.

Hyper Duplex (PREN Grade): The most advanced among the duplex grades, hyper duplex, has the highest levels of chromium, molybdenum, and nitrogen, leading to the highest pitting resistance equivalent number (PREN). This grade is designed for extreme environments where exceptional strength and outstanding corrosion resistance are essential, such as in deep-sea and highly acidic applications.

Your application will determine the type required. Browse our selection of Duplex Stainless Steels or get in touch for further advice and support.

Benefits of NeoNickel’s Duplex Stainless Steel:

✓ Superior Pitting Resistance: High chromium content ensures exceptional corrosion resistance, especially effective in chloride-rich environments, preventing stress corrosion cracking and crevice corrosion.

✓ High Yield Strength: Offers greater strength compared to traditional stainless steels, ensuring durability in demanding applications.

✓ Enhanced Conductivity: Exhibits better conductivity, advantageous in certain manufacturing and industrial processes.

✓ Performance in Low Temperatures: Retains strength and resists brittleness in low-temperature environments.

✓ Good Weldability and Ductility: Can be welded effectively, facilitating ease in fabrication and repair. Provides flexibility and resilience, making it ideal for applications requiring deformation without breaking.

✓ Controlled Thermal Expansion: Exhibits lower thermal expansion compared to austenitic stainless steels, maintaining structural integrity in varied temperatures.

Explore Our Duplex Stainless Steel Range

**UNS S32205 **

✓ Excellent Corrosion Resistance: Exceptionally effective against corrosion, particularly in chloride-rich environments.

✓ High Strength: Superior strength, exceeding that of conventional stainless steel grades.

✓ Ferritic-Austenitic Microstructure: Combines the best qualities of both steel types for enhanced performance.

✓ Ideal for Harsh Industries: Highly suitable for use in oil and gas industries, chemical processing, and marine engineering.

✓ Resilient to Stress Corrosion Cracking: Offers robust performance under extreme stress and corrosive conditions.

✓ Superb Weldability: Facilitates strong and reliable welding for various fabrications.

✓Durable and Reliable: Well-adapted for demanding and challenging operational conditions.

**UNS S31803/2205 **

✓ Optimal Corrosion Resistance: Highly effective against corrosion, particularly in high chloride environments.

✓ High Strength: Superior strength surpassing conventional stainless steel grades.

✓ Ferritic and Austenitic Microstructure: Offers the best qualities of both steel types, enhancing overall performance.

✓ Ideal for Demanding Industries: Perfectly suited for oil and gas, chemical processing, and marine engineering.

✓ Resistance to Stress Corrosion Cracking: Robust in facing extreme stress and corrosive conditions.

✓ Excellent Weldability: Facilitates easy and reliable fabrication.

✓ Suitability for Challenging Conditions: Designed to be dependable and durable in harsh operational environments.

**UNS S32760 **

✓ Exceptional Strength and Corrosion Resistance: Superior to many conventional stainless steel grades.

✓ Rich Chemical Composition: High concentration of chromium, molybdenum, and nitrogen.

✓ Resistance to Pitting and Crevice Corrosion: Especially effective in chloride-rich environments.

✓ Excellent Stress Corrosion Cracking and Erosion Resistance: Maintains integrity under mechanical and chemical stress.

✓ High Mechanical Strength and Toughness: Ideal for heavy-duty applications.

✓ Durability: Remarkable long-term performance.

✓ Good Weldability: Facilitates easier fabrication and repair.

✓ Ideal for Harsh Industrial Applications: Preferred in oil and gas industries, chemical processing, and marine industries.

ZERON® 100

✓ Outstanding Corrosion Resistance: Exceptionally effective in saline, acidic, and aggressive chemical environments.

✓ Highly Advanced Alloy: Recognised for its robust and superior performance.

✓ Balanced Chemical Composition: Contains high levels of chromium, molybdenum, and nitrogen.

✓ Resistance to Pitting and Crevice Corrosion: Enhanced ability to withstand corrosive damage.

✓ Impressive Strength and Durability: Exceeds conventional stainless steel capabilities.

✓ Ideal for Demanding Industrial Applications: Suitable for oil and gas exploration, chemical processing, and marine engineering.

✓ Excellent Weldability: Facilitates strong and durable joins.

✓ Toughness in Extreme Conditions: Maintains reliability and longevity even in harsh operational scenarios.

Duplex Stainless Steel Applications:

• Oil and Gas Industry: Used in pipelines, storage tanks, and offshore structures for its corrosion resistance and strength.
• Chemical Processing Plants: Ideal for reactors and heat exchangers due to its ability to withstand corrosive substances.
• Marine Engineering: Applied in shipbuilding, especially in harsh sea environments, for its durability and resistance to saltwater corrosion.
• Water Treatment Facilities: Utilised in desalination plants and sewage treatment systems for its resilience to chlorides and other harsh chemicals.
• Construction: Employed in structural components and facade elements where strength and aesthetics are required.
• Food and Beverage Industry: Used in food processing equipment for its hygienic properties and resistance to food acids.
• Pulp and Paper Industry: Suitable for processing equipment that encounters corrosive materials and high temperatures.
• Pharmaceutical Industry: Utilised in manufacturing equipment due to its cleanability and corrosion resistance.
• Transportation Infrastructure: Used in bridge components, railway vehicles, and road transport for its high strength-to-weight ratio and durability.

Manufacturing Excellence

Explore our range of quality approvals that showcase our dedication to exceptional business performance, streamlined processes, and the superior quality of our products and services.

Our focus is always on a customer-centric approach, ensuring that each client receives the utmost quality assurance and comprehensive technical support. This commitment reflects our steadfast dedication to not just meet, but exceed industry standards and client expectations. Reach out to our team for personalised assistance and expert advice.