Duplex Steel S31803 Pipes are widely trusted by industrial buyers who demand a strong balance of corrosion resistance, mechanical strength, and long-term cost efficiency. Engineered with a dual-phase austenitic–ferritic microstructure, Duplex Steel S31803 Pipes deliver superior performance in aggressive environments, making them an ideal solution for projects where durability, safety, and reliability are critical.
Why Buyers Prefer Duplex Steel S31803 Pipes
Buyers consistently choose Duplex Steel S31803 alloy pipes because they offer nearly double the strength of conventional austenitic stainless steels while maintaining excellent corrosion resistance. This unique combination allows buyers to reduce wall thickness without compromising performance, leading to material savings and lower installation costs.
Moreover, Duplex Steel S31803 pipes provide outstanding resistance to stress corrosion cracking, pitting, and crevice corrosion—common challenges in chloride-rich environments. As a result, buyers benefit from longer service life, reduced maintenance, and improved operational efficiency.
Key benefits that drive buyer preference include:
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High tensile and yield strength compared to austenitic steels
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Excellent resistance to stress corrosion cracking
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Superior pitting and crevice corrosion resistance
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Good weldability with proper fabrication procedures
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Lower lifecycle costs due to extended service life
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Strong performance in marine and chemical environments
Because of these advantages, Duplex Steel pipes are widely specified for demanding industrial applications.
Technical Specifications of Duplex Steel S31803 Pipes
Buyers rely on accurate technical data to ensure material compatibility with operational conditions. Duplex Steel S31803 pipes meet strict international standards and deliver consistent performance.
Chemical Composition (%)
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Iron (Fe): Balance
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Chromium (Cr): 21.0 – 23.0
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Nickel (Ni): 4.5 – 6.5
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Molybdenum (Mo): 2.5 – 3.5
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Nitrogen (N): 0.08 – 0.20
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Manganese (Mn): 2.0 max
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Silicon (Si): 1.0 max
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Carbon (C): 0.03 max
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Phosphorus (P): 0.03 max
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Sulfur (S): 0.02 max
This balanced chemistry ensures high strength and corrosion resistance.
Mechanical Properties
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Tensile Strength: 620 MPa (min)
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Yield Strength: 450 MPa (min)
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Elongation: 25% (min)
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Density: 7.8 g/cm³
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Hardness: ≤ 290 HB
These properties allow Duplex Steel S31803 pipes to perform reliably under high pressure and mechanical stress.
Available Forms
To support diverse project requirements, Duplex Steel S31803 pipes are available in:
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Seamless pipes
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Welded pipes
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ERW pipes
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Heat exchanger tubes
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Custom-cut lengths and fabricated components
This range helps buyers streamline procurement and installation.
Applications
Duplex Steel S31803 pipes are widely used in industries requiring strength and corrosion resistance:
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Oil & gas exploration and processing
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Chemical and petrochemical industries
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Marine and offshore structures
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Pulp and paper processing
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Desalination and water treatment plants
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Heat exchangers and pressure vessels
Their reliability makes them a preferred choice for critical infrastructure.
International Standards & Specifications
Duplex Steel S31803 pipes comply with internationally recognized standards, ensuring global acceptance and traceability:
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UNS: S31803
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ASTM: ASTM A790, ASTM A789
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ASME: ASME SA790, ASME SA789
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DIN / EN: DIN 17456, EN 10216-5
These standards ensure consistent quality and performance.
Regional Market Focus
Adinox Overseas supplies Duplex Steel S31803 pipes to key industrial markets worldwide:
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India: Oil & gas, chemical processing, infrastructure projects
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Germany: Advanced engineering, marine, and industrial manufacturing
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UK: Offshore energy, water treatment, and chemical sectors
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UAE: Petrochemical plants, desalination projects, offshore platforms
Why Buyers Partner with Adinox Overseas
Selecting the right supplier is crucial for project success. Adinox Overseas delivers more than materials—providing reliability, expertise, and responsive service.
Buyers benefit from:
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Mill Test Certificates (MTCs) as per EN 10204 3.1
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Flexible minimum order quantities (MOQs)
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Efficient global logistics and export-grade packaging
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Dedicated technical support and material consultation
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Strict quality control and competitive pricing
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Customized solutions for project-specific requirements
This buyer-focused approach ensures seamless procurement and long-term partnerships.
Get a Competitive Quote for Duplex Steel S31803 Pipes Today
If your project requires high strength, excellent corrosion resistance, and cost-effective performance, Duplex Steel S31803 pipes from Adinox Overseas deliver a proven solution. Contact our team today to discuss specifications, availability, and delivery timelines.
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Partner with Adinox Overseas for premium duplex steel piping solutions that improve efficiency, reduce lifecycle costs, and ensure long-term operational reliability.