Material Category :
Produced using duplex stainless steel with a dual-phase ferritic and austenitic microstructure.
Material Category :
Produced using duplex stainless steel with a dual-phase ferritic and austenitic microstructure.
Alloy Identification :
Manufactured in UNS S31803 / Duplex 2205 grade for advanced industrial corrosion resistance.
Compliance Standards :
Fabricated according to ASTM A790, ASTM A928, and internationally recognized piping specifications.
Dimensional Range :
Available in multiple nominal pipe sizes for process, structural, and pressure applications.
Modern industrial systems demand piping materials capable of handling corrosion, pressure, aggressive chemicals, and fluctuating temperatures without compromising reliability. Duplex Steel 31803 Pipes are widely recognized for delivering exceptional mechanical strength, chloride corrosion resistance, and long operational life across offshore, marine, chemical, and process industries.
Manufactured with a balanced ferritic-austenitic microstructure, UNS S31803 pipes combine the advantages of conventional stainless steel with significantly improved durability and structural performance. Their high yield strength and corrosion resistance make them an ideal solution for industrial operations where standard stainless steel or carbon steel piping may experience premature failure.
Understanding Duplex Steel 31803 Pipes
Duplex Steel 31803, commonly associated with Duplex 2205 grade, is engineered for applications exposed to chloride-rich, acidic, and high-pressure environments.
Key Material Characteristics
These properties explain why many industries prefer Duplex Steel for demanding industrial process systems.
Mechanical Properties and Industrial Performance
The superior Duplex S31803 mechanical properties allow these pipes to perform effectively in severe operating conditions.
High Yield Strength: Compared to standard stainless steel, Duplex Steel offers nearly double the yield strength, making it suitable for pressure-intensive systems.
Corrosion Resistance: One of the major advantages of Duplex Steel 31803 Pipes is their ability to resist chloride-induced cracking and aggressive chemical exposure.
Long-Term Durability: Industries requiring reliable service life often choose Duplex piping because of its exceptional fatigue and wear resistance.
Available Product Configurations
To support diverse industrial requirements, Duplex Steel 31803 Pipes are available in multiple configurations:
Each configuration is manufactured according to international standards, including:
Duplex 2205 vs Super Duplex Piping
Super Duplex offers higher corrosion resistance and strength, while Duplex 31803 provides a cost-effective balance between performance and affordability.
How to Select Duplex Steel Pipes
Choosing the correct Duplex piping solution depends on:
Industries should always prioritize material certification and application suitability before procurement.
How to Identify Duplex 31803 Pipes
Authentic Duplex Steel pipes are generally identified through:
Reliable suppliers also provide third-party inspection reports to ensure material authenticity and compliance.
With exceptional mechanical strength, chloride corrosion resistance, and long-term durability, Duplex Steel 31803 Pipes continue to serve as a reliable material solution for offshore, marine, mining, LNG, and chemical processing industries. Their balanced performance, structural stability, and resistance to aggressive industrial conditions make them an advanced alternative to conventional stainless steel and carbon steel piping systems.
| STANDARD | UNS | WNR. |
|---|---|---|
| Duplex Steel 2205 | S31803 / S32205 | 1.4462 |
Duplex Steel Seamless Pipes
Designed for high-pressure industrial systems requiring superior corrosion resistance and mechanical strength.
Duplex Steel Welded Pipes
Manufactured for structural and process applications demanding durability in aggressive operating environments.
Duplex Steel EFW Pipes
Suitable for large-diameter piping systems exposed to elevated pressure and corrosive conditions.
Duplex Steel Seamless Tubes
Engineered for precision fluid transfer and heat exchanger applications requiring reliable performance.
Duplex Steel Welded Tubes
Provide dependable corrosion protection and long operational life in industrial processing systems.
Duplex Steel ERW Pipes & Tubes
Deliver consistent dimensional accuracy and excellent chloride resistance for demanding piping applications.
Material Category :
Produced using duplex stainless steel with a dual-phase ferritic and austenitic microstructure.
Alloy Identification :
Manufactured in UNS S31803 / Duplex 2205 grade for advanced industrial corrosion resistance.
Compliance Standards :
Fabricated according to ASTM A790, ASTM A928, and internationally recognized piping specifications.
Dimensional Range :
Available in multiple nominal pipe sizes for process, structural, and pressure applications.
Pressure Capability :
Engineered to withstand elevated internal pressure and aggressive operational environments.
Surface Treatment :
Offered in annealed, pickled, polished, and cold-finished surface conditions.
Pipe Construction :
Supplied in seamless, welded, heavy-wall, and large-diameter configurations.
Structural Performance :
Provides high tensile strength and enhanced fatigue resistance under cyclic loading conditions.
Corrosion Behaviour :
Designed to resist pitting, crevice attack, chloride stress cracking, and acidic media exposure.
Thermal Efficiency :
Maintains reliable mechanical stability during fluctuating thermal operating cycles.
Industrial Utilization :
Widely implemented in LNG plants, desalination facilities, offshore systems, and mining operations.
Quality Verification :
Evaluated through hydrostatic testing, PMI analysis, ultrasonic inspection, and third-party certification.
Supply Protection :
Delivered with export-grade packaging, traceability documentation, and mill-certified inspection records.
Chemical Composition of Duplex Steel Pipes and Tubes
| Grade | Common Name | C% | Mn% | Si% | P% | S% | Cr% | Ni% | Mo% | N% |
|---|---|---|---|---|---|---|---|---|---|---|
| 2205 | S31803 | 0.030 | 2.00 | 1.00 | 0.030 | 0.020 | 21.0-23.0 | 4.5-6.5 | 2.5-3.5 | 0.08-0.20 |
| S32205 | 0.030 | 2.00 | 1.00 | 0.030 | 0.020 | 22.0-23.0 | 4.5-6.5 | 3.0-3.5 | 0.14-0.20 |
Mechanical Properties Of Duplex Steel Seamless and Welded Pipes / Tubes
| Tensile Strength, ksi | 90 min |
|---|---|
| 0.2% Yield Strength, ksi | 65 min |
| Elongation, % | 25 min |
| Hardness [HRC] | 293 max |
Physical Properties of UNS S31803/S32205 Duplex Steel Pipes and Tubes
| Density lbm/in3 | Electrical Resistivity mW•in | Thermal Conductivity (BTU/hr•ft•°F) | Heat Capacity BTU/lbm•°F | Electrical Resistivity (in x 10-6) | |
|---|---|---|---|---|---|
| at 68°F | 0.278 | 27.6 | 8.7 | 0.112 | 33.5 |
| at 212°F | 26.1 | 9.2 | 0.119 | 35.4 | |
| at 392°F | 25.4 | 9.8 | 0.127 | 37.4 | |
| at 572°F | 24.9 | 10.4 | 0.134 | 39.4 |
Our Duplex Steel 31803 Pipes Supplier are used in a wide range of applications and various industries. Below are a few of them:
Application Industries
Aerospace Industry
Food Processing Industry
Pulp & Paper Indusry
Energy Industry
Pharmaceuticals Industry
Power Plant Industry
Chemical Industry
Oil and Gas Industry
Get clear answers to common queries about our steel products, services, and delivery processes.
Duplex Steel pipes are ideal for corrosive, high-pressure, and chloride-rich industrial environments.
Duplex 31803 is extensively utilized in marine and seawater systems due to its outstanding resistance to chloride-induced corrosion and harsh saline operating conditions.
They offer high mechanical strength, excellent corrosion resistance, and long operational service life in demanding industrial systems.
Identification is typically confirmed through ASTM markings, PMI testing, and certified material documentation.
Our Location
Flat no 5, Swapna HSG Soc
Ltd., Charkop, Kandivali West,
Mumbai, Maharashtra, India.
400067
