Duplex UNS S31803 Pipes & Tubes
Duplex UNS S31803 Pipes & Tubes
Premium-quality Duplex UNS S31803 Pipes & Tubes manufactured for reliable fluid conveyance, heat transfer and structural applications in industrial service.
- Duplex S31803
- Seamless
- ERW
- Welded
- EFW
- LSAW
- Custom Lengths
Duplex UNS S31803 Pipes & Tubes Manufacturer in India
Sawariya Metal Industries is a manufacturer, supplier, stockist and exporter of Duplex UNS S31803 Pipes & Tubes in different sizes, grades, specifications and finishes for industrial and engineering applications.
Duplex UNS S31803 Pipes & Tubes are supplied in seamless, ERW, welded and fabricated forms in a wide range of diameters, wall thicknesses, schedules and lengths for process, pressure and structural applications.
UNS S31803 is the original 2205 duplex stainless steel specification, combining high strength with good chloride corrosion resistance. Duplex stainless steel has a two-phase austenitic-ferritic structure that delivers higher strength than standard austenitic grades together with good resistance to pitting, crevice corrosion and chloride stress corrosion cracking.
Typical applications for Duplex UNS S31803 Pipes & Tubes include oil & gas, chemical processing, petrochemical, desalination, marine applications, pulp & paper, heat exchangers, pressure vessels and general engineering.
Key Features of Duplex S31803
High Strength
Higher yield strength than conventional 300-series stainless steels.
Corrosion Resistance
Good resistance to pitting, crevice and general corrosion.
SCC Resistance
Improved resistance to chloride stress corrosion cracking.
Cost Efficient
Strength and durability help reduce material and lifecycle cost.
Duplex UNS S31803 Pipes & Tubes Specifications
| Parameter | Specification |
|---|---|
| Product | Duplex UNS S31803 Pipes & Tubes |
| Specifications | ASTM A790 / ASME SA790, ASTM A789 / ASME SA A789 |
| Dimensions | ASTM, ASME and API |
| Size | 1/2"NB TO 12 "NB IN |
| Seamless Pipes & Tubes Sizes | 1/2" NB – 8" NB |
| Welded Pipes & Tubes Sizes | 6" NB – 24" NB |
| Outer Diameter | 6.0-630mm |
| Thickness | 0.5-45mm |
| Schedule | SCH20, SCH30, SCH40, STD, SCH80 |
| Type | Seamless / ERW / Welded / Fabricated / CDW |
| Form | Round Pipes/Tubes, Square Pipes/Tubes, Rectangular Pipe/Tubes, Coiled Tubes, "U" Shape, Pan Cake Coils, Hydraulic Tubes |
| Length | Single Random, Double Random & Required Length |
| End | Plain End, Beveled End, Threaded |
Chemical Composition of Duplex S31803
| Element | Min | Max |
|---|---|---|
| C | – | 1.0 |
| N | – | 0.03 |
| P | – | 0.02 |
| Si | – | 2.0 |
| Mn | 3.0 | 3.5 |
| Mo | 22.0 | 23.0 |
| Fe | – | 0.03 |
| cr | 4.5 | 6.5 |
| s | 0.14 | 0.2 |
Types of Duplex UNS S31803 Pipes & Tubes
Seamless Pipes
High-integrity pipes for pressure and high-temperature service.
ERW Pipes
Electric resistance welded pipes for general and process piping.
Welded / EFW Pipes
Welded and electric fusion welded pipes for larger diameters.
Tubes
Round, square, rectangular, U-bent and heat exchanger tubes.
Applications & Industries
- Oil & Gas
- Chemical Processing
- Petrochemical
- Desalination
- Marine Applications
- Pulp & Paper
- Heat Exchangers
- Pressure Vessels
- Water Treatment
- Offshore Platforms
- Fabrication
- General Engineering
Quality & Inspection
Quality-Focused Manufacturing & Supply
Duplex UNS S31803 Pipes & Tubes can be supplied with inspection, testing and documentation according to the applicable specification and customer purchase requirements.
- Dimensional & visual inspection
- Material grade verification
- Chemical composition verification
- Mechanical property testing
- Flattening / flaring tests as applicable
- Hydrostatic testing as applicable
- Ultrasonic / eddy current testing as applicable
- Mill Test Certificate (MTC)
- Third-party inspection support
Why Choose Our Duplex UNS S31803 Pipes & Tubes?
Multiple Manufacturing Routes
Seamless, ERW, welded and EFW options.
Wide Size Range
Many diameters, schedules and lengths.
Pressure Service
Suitable for demanding pressure applications.
Tested Quality
Supplied with test reports and MTC.
Duplex UNS S31803 Pipes & Tubes Manufacturer, Supplier & Exporter
Sawariya Metal Industries supplies Duplex UNS S31803 Pipes & Tubes for domestic and international projects in a wide range of sizes, grades and specifications. Products can be supplied in standard and custom dimensions according to drawings and purchase order requirements.
Every order can be supported with Mill Test Certificates, inspection reports, third-party inspection on request and secure export-worthy packaging.
Share your size, grade, quantity and specification requirements with our team to receive a competitive quotation for Duplex UNS S31803 Pipes & Tubes.
Related Duplex Steel Pipes & Tubes Products
Duplex UNS S32205 Pipes & Tubes
UNS S32205 is a 2205 duplex grade with tighter nitrogen and molybdenum ranges for improved pitting resistance.
Technical Note: Technical values should be verified against the applicable ASTM / ASME / EN specification, purchase order requirements and Mill Test Certificate (MTC) for the supplied product.