Super Duplex Steel Chemical Composition, Mechanical Properties & Standards
Super Duplex Steel is widely recognized as one of the most reliable materials for industries operating in extreme environments. Its unique structure, high strength, and superior corrosion resistance make it a preferred choice for oil & gas, chemical processing, marine, and desalination projects. This guide explains Super Duplex Steel Chemical Composition, Mechanical Properties & Standards in a clear and practical way, while also showing how Zeon Exports supports global buyers with certified supply and fast delivery.
Understanding Super Duplex Steel
Super Duplex Steel belongs to the duplex stainless steel family but offers higher alloy content and enhanced performance. It combines roughly equal amounts of ferrite and austenite in its microstructure, resulting in a steel that is both strong and highly resistant to corrosion.
This balance is carefully controlled through chemistry and manufacturing standards, which is why Super Duplex Steel Chemical Composition, Mechanical Properties & Standards play a crucial role in material selection.
Chemical Composition of Super Duplex Steel
The chemical composition directly defines how Super Duplex Steel behaves under pressure, temperature, and corrosive exposure. Key elements include:
- Chromium (24 – 26%)
Improves resistance to pitting and crevice corrosion, especially in chloride environments. - Nickel (6 – 8%)
Helps maintain the austenite-ferrite balance and improves toughness. - Molybdenum (3 – 4%)
Enhances resistance to aggressive chemicals and seawater. - Nitrogen (0.24 – 0.32%)
Boosts strength and improves resistance to localized corrosion. - Low Carbon (≤ 0.03%)
Minimizes the risk of intergranular corrosion, especially after welding.
This optimized chemistry is the foundation of Super Duplex Steel Chemical Composition, Mechanical Properties & Standards, ensuring long service life even in harsh operating conditions.
Mechanical Properties Explained Simply
One of the biggest advantages of Super Duplex Steel is its exceptional mechanical performance. Compared to standard stainless steels, it offers nearly double the yield strength.
Key mechanical benefits include:
- High Yield Strength – Allows thinner sections, reducing material weight and cost
- High Tensile Strength – Suitable for high-pressure pipelines and vessels
- Excellent Toughness – Performs well at both high and low temperatures
- Good Fatigue Resistance – Ideal for components exposed to repeated stress cycles
These properties make Super Duplex Steel suitable for critical applications where failure is not an option.
International Standards & Grades
To ensure consistent quality worldwide, Super Duplex Steel is produced according to international standards. Common specifications include:
- ASTM A240 – Plates, sheets, and coils
- ASTM A790 – Pipes and tubes
- ASTM A182 – Forged flanges and fittings
- ASTM A276 / A479 – Bars and rods
Popular grades such as UNS S32750 (F53) and UNS S32760 (F55) strictly follow Super Duplex Steel Chemical Composition, Mechanical Properties & Standards, ensuring predictable performance across projects.
Typical Applications
Because of its strength and corrosion resistance, Super Duplex Steel is widely used in:
- Offshore oil & gas platforms
- Chemical and petrochemical plants
- Heat exchangers and pressure vessels
- Desalination and water treatment systems
- Marine shafts, pumps, and valves
For long-term reliability in aggressive environments, Super Duplex Steel is often the most cost-effective choice.
Zeon Exports – Supply, Stock
At Zeon Exports, we don’t just explain materials - we supply them. We are a trusted exporter and stockist of Super Duplex Steel products, serving EPC contractors, fabricators, and industrial buyers worldwide.
What Zeon Exports Supplies
- Super Duplex Steel pipes & tubes
- Plates, sheets & coils
- Flanges, fittings & forged components
- Bars, rods & custom-cut sections
All materials are supplied with mill test certificates and comply with Super Duplex Steel Chemical Composition, Mechanical Properties & Standards required for international projects.
Why Buy from Zeon Exports?
- ASTM & ASME certified materials
- Ready stock for urgent requirements
- Competitive export pricing
- Secure packaging & global shipping
Whether you are sourcing for a single project or long-term supply, Zeon Exports ensures consistent quality and dependable service.
Buy Super Duplex Steel with confidence
Visit now: Duplex Steel
Enquire today for pricing & availability
Frequently Asked Questions (FAQs)
Q1. What makes Super Duplex Steel better than standard stainless steel?
It offers higher strength and far better resistance to corrosion, especially in chloride-rich environments.
Q2. Is Super Duplex Steel suitable for welding?
Yes, when proper welding procedures are followed to maintain phase balance.
Q3. Which standards does Zeon Exports follow?
We supply materials as per ASTM, ASME, and other international standards.
Q4. Can Zeon Exports handle bulk export orders?
Yes, we specialize in bulk supply with reliable global logistics.
Q5. Where can I check product details or place an enquiry?
You can visit our Duplex Steel page or contact our sales team directly.