What Are the Different Types of Duplex Stainless Steel?
Duplex Stainless Steel has become one of the most trusted materials for industries that deal with high pressure, extreme temperatures, and corrosive environments. It offers a strong combination of ferritic and austenitic microstructures, giving it higher strength and better corrosion resistance than standard stainless steels. Understanding the different types of Duplex Stainless Steel helps engineers, buyers, and fabricators choose the right material for their applications.
Whether it's chemical processing, oil & gas, marine systems, or desalination plants, Duplex Stainless Steel ensures long-term durability and improved performance.
What Makes Duplex Stainless Steel Special?
Duplex Stainless Steel stands out because it solves the limitations faced by austenitic grades like 304/316 and ferritic steels. Its dual-phase structure provides:
- High mechanical strength
- Excellent resistance to pitting and crevice corrosion
- Low thermal expansion and high toughness
- Superior resistance in chloride-rich environments
- Better stress corrosion cracking resistance
This makes Duplex steel suitable for industries where reliability and safety are crucial.
Different Types of Duplex Stainless Steel
There are four major categories under Duplex Stainless Steel. Each type is designed to handle specific levels of corrosion, temperature, and environmental exposure.
1. Lean Duplex Stainless Steel
Lean Duplex grades provide duplex-level strength at a more economical cost by reducing nickel and molybdenum content.
Common Grades:
- UNS S32101 (LDX 2101)
- UNS S32304 (2304)
Key Features:
- Affordable alternative to standard duplex
- Good resistance to pitting corrosion
- High mechanical strength
Where It Is Used:
- Tanks & vessels
- Water treatment plants
- Architecture & infrastructure
2. Standard Duplex Stainless Steel
This is the most widely used type and the one most people refer to when they search for what the different types of Duplex Stainless Steel are.
Common Grades:
- UNS S31803 / S32205 (Duplex 2205)
Key Features:
- Excellent corrosion resistance
- High strength-to-weight ratio
- Good weldability
Applications:
- Oil & gas pipelines
- Heat exchangers
- Pressure vessels
3. Super Duplex Stainless Steel
For extremely corrosive environments, Super Duplex provides higher chromium, nitrogen, and molybdenum content.
Common Grades:
- UNS S32750 (2507)
- UNS S32760 (Zeron 100)
Reasons to Choose:
- Outstanding resistance to seawater corrosion
- Extremely high tensile strength
- Perfect for offshore and marine applications
4. Hyper Duplex Stainless Steel
The strongest and most corrosion-resistant category, designed for the most severe industrial conditions.
Popular Grades:
- UNS S33207
- UNS S32707
Best For:
- Deep-sea operations
- High-pressure offshore pipelines
- Chemical handling equipment
Why Choose Zeon Exports for Duplex Stainless Steel?
If you are searching for a trusted and experienced supplier of Duplex, Super Duplex, and Hyper Duplex Stainless Steel, Zeon Exports is your one-stop solution. With years of expertise and a strong global network, we deliver materials that match international standards and project demands.
What Zeon Exports Offers:
- Complete Range: LDX 2101, 2304, Duplex 2205, Super Duplex 2507, Zeron 100, Hyper Duplex grades
- Product Forms: Pipes, tubes, sheets, plates, coils, round bars, flanges, buttweld fittings
- Quality Assurance: 100% tested materials with MTC (as per EN 10204 3.1)
- Worldwide Delivery: Fast dispatch for domestic & export orders
- Competitive Pricing: Best rates for bulk orders & industrial projects
- Custom Sizes: Cut-to-size materials available on request
Why Engineers & Buyers Trust Us:
- Consistent quality
- Huge ready stock
- Reliable service
- On-time delivery
- High-grade packaging for export
Whether you need Duplex Stainless Steel for offshore rigs, chemical plants, desalination units, or mechanical structures, we ensure the exact grade and specifications you need.
Ready to Buy Duplex Stainless Steel?
At Zeon Exports, we simplify your sourcing process:
Buy Now – High-quality Duplex, Super Duplex & Hyper Duplex material
Enquire Now – Quick quotations with best pricing
Visit Now – www.zeonexports.com for full product details
Call/WhatsApp – +91 9819 39 2850
Your projects deserve reliable materials. Let us deliver them.
FAQ: What Are the Different Types of Duplex Stainless Steel?
1. How many types of Duplex Stainless Steel are there?
There are four main types: Lean Duplex, Standard Duplex, Super Duplex, and Hyper Duplex.
2. Which Duplex grade is the most common?
Duplex 2205 (S32205/S31803) is the most widely used standard duplex grade.
3. What is the difference between Duplex and Super Duplex?
Super Duplex has higher chromium, molybdenum, and nitrogen content—offering superior corrosion resistance.
4. Do you supply customised sizes?
Yes, Zeon Exports offers cut-to-size plates, pipes, and bars based on project requirements.
5. Are international shipments available?
Absolutely. We export Duplex Stainless Steel globally with safe packaging and timely delivery.