Super duplex pipe is a high-performance corrosion-resistant alloy pipe, widely recognized as an ideal solution for harsh working conditions with high chloride ion content and high pressure. Below we share specific information about super duplex pipes to help you judge product applicability for your projects.
1. Standard Grades & Material Standards
Common mainstream grades of super duplex steel pipes include UNS S32750 (2507), UNS S32760 (Zeron 100), etc., and are produced in strict accordance with standards such as ASTM A790 / ASTM A789.
- Typical chemical composition: 25% chromium, 7% nickel, 4% molybdenum with nitrogen alloying, forming a balanced ferrite-austenite dual-phase structure
- The dual-phase structure gives the material both the high strength of ferritic steel and the excellent toughness of austenitic stainless steel
2. Core Performance Advantages
Compared with ordinary 304/316L stainless steel pipes, super duplex pipes have obvious performance upgrades:
- Excellent pitting corrosion resistance (PREN ≥ 40) and crevice corrosion resistance, suitable for seawater and brine environments
- High tensile strength, which allows thinner wall thickness design and reduces overall project cost
- Good resistance to stress corrosion cracking, with stable performance under high-temperature and high-pressure working conditions
3. Main Application Scenarios
Super duplex pipes are widely used in industries with strict corrosion resistance requirements:
- Offshore oil & gas engineering, seawater desalination systems
- Chemical processing, pulp and paper manufacturing
- Flue gas desulfurization equipment, marine engineering pipelines
4. Available Specifications
We supply super duplex seamless pipes and welded pipes with a complete size range:
- Outer diameter: from 1/2" (21.3mm) up to 24" (610mm)
- Wall thickness: SCH10S to SCH160, custom dimensions are available according to project requirements
For more specific information on super duplex pipe pricing, lead time and full size list, you can visit for inquiry. All our products come with full material certification and support third-party inspection to ensure compliance with project standards.
If you have special requirements for material grade, specification or corrosion resistance index, feel free to contact us for targeted technical solutions and quotation.
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