Duplex S31803 Spool exporter in UAE
Duplex S31803 Spool exporter in UAE specializes in providing high-quality duplex stainless steel spools tailored for demanding industrial applications. This material, known for its excellent corrosion resistance and superior mechanical properties, is widely used in sectors such as oil and gas, petrochemical, and marine industries. The spools are fabricated using stainless steel grade S31803, a duplex alloy that combines the benefits of both austenitic and ferritic stainless steel, ensuring durability and strength under harsh operating conditions.
Manufactured with precise welding and stringent quality control, these stainless steel spools conform to international standards, making them suitable for critical piping systems. The duplex grade offers enhanced resistance to chloride stress corrosion cracking and high tensile strength, which is essential for pipelines exposed to aggressive environments. Additionally, the spools exhibit excellent weldability and thermal conductivity, facilitating efficient installation and long service life.
These spools are engineered to meet the specific dimensional and pressure requirements demanded by industrial projects. Customization options include various diameters, wall thicknesses, and flange configurations to ensure compatibility with existing infrastructure. Their robust construction makes them ideal for transporting corrosive fluids, chemicals, and high-pressure gases, thereby supporting operational safety and reliability.
Export readiness is a key feature of suppliers in the UAE, with streamlined logistics and compliance with global shipping regulations. Packaging is designed to protect the integrity of the duplex stainless steel during transit, minimizing the risk of damage. Moreover, documentation such as mill test certificates, material test reports, and compliance certificates are provided to facilitate smooth customs clearance and project verification processes.
For industrial buyers seeking duplex stainless steel spools, sourcing from established exporters in the UAE offers access to premium materials combined with efficient delivery schedules. This ensures projects remain on track while benefiting from the superior performance characteristics of Duplex S31803 stainless steel, ultimately contributing to enhanced system longevity and reduced maintenance costs.
Lead Time
2–7 weeks depending on size
Delivery Terms
FOB, CIF, DDP
Shipping Modes
Sea / Air / Express
Why Duplex S31803 Spool exporter in UAE Are Preferred by Global Buyers
- ✔ Factory Pricing: Direct manufacturer rates with bulk stock
- ✔ Certified Quality: ISO & 3rd-party tested, EN 10204 certified
- ✔ Export-Ready: Sea-worthy packaging for on-time delivery
- ✔ Fast RFQs: Quick quotes for custom sizes & quantities
- ✔ Traceability: 100% heat number tracking from raw material to finished product
Trusted by industries like oil & gas, petrochemicals, power, marine, and heavy engineering.
- Manufacturing Capacity: 500 MT / Month
- Export Experience: 15+ Years
- Countries Served: 50+
- Annual Export Volume: 5,500 MT
Table of Contents
- 1. What is Duplex S31803 Spool exporter in UAE
- 2. How to Choose the Right Manufacturer
- 3.Comparison of Duplex S31803 Spool exporter in UAE
- 4. Why Global Buyers Source from Ragnar Metals and Tubes
- 5. Features
- 6. Technical Overview
- 7. Specifications
- 8. Available Grades
- 9. Available Sizes
- 10. Chemical Properties
- 11. Mechanical Properties
- 12. Physical & Thermal Properties
- 13. Electrical Resistivity
- 14. Equivalent Grades
- 15. Manufacturing Process & Heat Treatment
- 16. Various Types
- 17. Applications & Uses
- 18. Industries We Serve
- 19. Latest Price List
- 20. MOQ & Payment Terms
- 21. Export Packaging & Shipping
- 22. Cities We Supply in India
- 23. Countries We Export Worldwide
- 24. Our Certifications
- 25. Quality Inspection & Testing
- 26. Our Other Product Types
- 27. People Also Search For
- 28. Frequently Asked Questions
- 29. About Ragnar Metals and Tubes
How to Choose the Right Duplex S31803 Spool exporter in UAE
India is home to hundreds of manufacturers ranging from small job shops to large ISO-certified exporters. International and domestic buyers typically evaluate manufacturers based on quality compliance, production capacity, export experience, and pricing transparency.
- Certification & international standards (ASME, ASTM, EN)
- Manufacturing capability vs trading activity
- Export documentation & inspection support
- Stock availability & lead time reliability
- Past supply experience in oil & gas, EPC & heavy industries
Comparison Factors Among Duplex S31803 Spool exporter in UAE
| Evaluation Factor | Small Local Suppliers | Trading Companies | ISO-Certified Manufacturers |
|---|---|---|---|
| Manufacturing Control | Limited | None | Full in-house / audited partners |
| International Standards | Basic | Depends on source | ASME / ASTM / EN |
| Inspection & MTCs | Limited | Inconsistent | EN 10204 3.1 / 3.2 |
| Export Experience | Low | Medium | 50+ countries |
| Risk for EPC Projects | High | Medium | Low |
International buyers typically prefer ISO-certified manufacturers for large-scale or critical applications due to better quality control, documentation, and lower project risk.
Why Global Buyers Choose Ragnar Metals and Tubes
Ragnar Metals and Tubes is a trusted ISO 9001:2015 certified manufacturer and global exporter of ferro alloys and metal products, supplying consistent, high-quality materials to customers across USA, UK, Europe, Middle East, Africa, and Asia-Pacific. Our focus on quality assurance, cost efficiency, and on-time delivery makes us a preferred sourcing partner for international buyers.
| Key Advantage | Buyer Benefit |
|---|---|
| ISO 9001:2015 Certified Manufacturing | Consistent quality with documented QA systems and process control |
| ASME / ASTM / EN Compliant Products | Globally accepted standards with EN 10204 3.1 / 3.2 MTCs |
| Lower Manufacturing & Sourcing Costs | Save up to 15–20% compared to European suppliers |
| Favorable Exchange Rate Advantage | Reduced landed cost for international importers |
| In-House Testing & Inspection Facilities | Strict chemical, mechanical & dimensional quality checks |
| Bulk Stock & High Production Capacity | Fast order fulfillment and stable supply for large projects |
| Custom Sizes & Drawing-Based Manufacturing | Products manufactured exactly to buyer specifications |
| Export-Grade Packaging & Global Logistics | Sea-worthy packing, palletization & worldwide shipping support |
| Faster Global Shipping Routes | Optimized logistics for Middle East, Africa & Southeast Asia |
| Technical & After-Sales Support | Project assistance, documentation & responsive RFQ handling |
| Trusted by Global Steel & EPC Companies | Proven export experience across 50+ countries |
Features of Duplex S31803 Spool
- ✔ Excellent corrosion resistance in a variety of environments
- ✔ High strength and durability, suitable for high-pressure applications
- ✔ Good weldability and formability for complex designs
- ✔ Resistance to pitting and crevice corrosion
- ✔ Cost-effective alternative to higher alloyed stainless steels
- ✔ Wide range of applications, including oil and gas, chemical processing, and marine industries
Technical Overview of Duplex S31803
| Product | Composition | Usage | Standards |
|---|---|---|---|
| Duplex S31803 Spool | Fe, 22% Cr, 5% Ni, 3% Mo | Used in piping systems for oil and gas, chemical processing | ASTM A790, ASME SA790 |
| Duplex S31803 Flange | Fe, 22% Cr, 5% Ni, 3% Mo | Flanges for high-pressure applications | ASTM A182, ASME SA182 |
| Duplex S31803 Fitting | Fe, 22% Cr, 5% Ni, 3% Mo | Fittings for connecting pipes in corrosive environments | ASTM A815, ASME SA815 |
Specifications Table
| Material | Duplex S31803 |
|---|---|
| Grades | S31803 |
| Standard | ASTM A790 / ASME SA790 |
| Size Range | 1/2" to 24" (DN15 to DN600) |
| Length | Up to 12 meters (40 feet) |
| Form | Spool |
Available Grades Table
| Product | Composition | Applications |
|---|---|---|
| Duplex S31803 | 22% Cr, 5% Ni, 3.2% Mo | Oil and gas, chemical processing, pressure vessels |
| Duplex S32205 | 22% Cr, 5.5% Ni, 3.2% Mo | Pulp and paper, marine environments, seawater applications |
| Super Duplex S32750 | 25% Cr, 7% Ni, 4% Mo | Offshore oil and gas, desalination plants, chemical storage |
| Super Duplex S32760 | 25% Cr, 7% Ni, 4% Mo, 0.5% N | High strength applications, oil and gas industry |
| Duplex S31803 (Welded) | 22% Cr, 5% Ni, 3.2% Mo | Welded constructions in harsh environments |
Available Sizes of Duplex S31803 (MM)
| Size (MM) | Size (MM) |
|---|---|
| 25 | 50 |
| 32 | 63 |
| 40 | 76 |
| 50 | 90 |
| 63 | 100 |
| 76 | 125 |
| 90 | 150 |
| 100 | 200 |
| 150 | 250 |
| 200 | 300 |
Chemical Properties of Duplex S31803
| Element | Composition (%) |
|---|---|
| Iron (Fe) | 61.0 - 68.0 |
| Chromium (Cr) | 22.0 - 23.0 |
| Nickel (Ni) | 4.5 - 6.5 |
| Molybdenum (Mo) | 2.5 - 3.5 |
| Manganese (Mn) | 0.08 - 1.0 |
| Silicon (Si) | 0.0 - 1.0 |
| Carbon (C) | 0.0 - 0.03 |
| Nitrogen (N) | 0.08 - 0.2 |
Mechanical Properties of Duplex S31803
| Property | Value |
|---|---|
| Tensile Strength (MPa) | 620 - 850 |
| Yield Strength (MPa) | 450 minimum |
| Elongation (%) | 25 minimum |
| Hardness (HB) | 250 maximum |
| Impact Strength (J at -40°C) | ≥ 40 |
Duplex S31803 – Physical & Thermal Properties
Density of Duplex S31803
| Property | Metric | Imperial |
|---|---|---|
| Density | 7.8 g/cm³ | 0.283 lb/in³ |
Melting Point of Duplex S31803
| Property | Metric | Imperial |
|---|---|---|
| Melting Point | 1400 - 1450 °C | 2552 - 2642 °F |
Specific Heat of Duplex S31803
| Specific Heat of Duplex S31803 | ||
|---|---|---|
| Specific Heat (J/kg·K) | Temperature Range (°C) | Condition |
| 500 | 20 - 300 | Room Temperature |
| 600 | 300 - 800 | High Temperature |
| 700 | 800 - 1200 | Very High Temperature |
Electrical Resistivity of Duplex S31803
| Electrical Resistivity | ||
|---|---|---|
| Value (µΩ·m) | Temperature (°C) | Treatment or Condition |
| 0.75 | 20 | As-rolled |
| 0.80 | 100 | |
| 0.85 | 200 | |
| 0.90 | 300 | |
| 0.95 | 400 | |
Equivalent of Duplex S31803
| Standard | Werkstoff Nr. | UNS |
|---|---|---|
| ASTM A790 | 1.4462 | S31803 |
| EN 10088-3 | X5CrNiMoN22-5-3 | S31803 |
Manufacturing Process & Heat Treatment of Duplex S31803
Annealing
Annealing of Duplex S31803 involves heating the material to a temperature of approximately 1020-1100°C, followed by controlled cooling. This process helps to relieve internal stresses and improve ductility while maintaining the desired mechanical properties of the alloy. It also promotes a balanced microstructure of austenite and ferrite phases.
Forging
The forging of Duplex S31803 is performed at temperatures ranging from 1100°C to 1200°C. This hot working process enhances the mechanical properties of the material by refining the grain structure and ensuring uniformity. It is essential to follow proper forging techniques to avoid any detrimental effects on the microstructure.
Hardening & Tempering
| Process | Temperature Range (°C) | Quenching Medium | Purpose |
|---|---|---|---|
| Hardening | 1000-1100 | Oil or Water | To increase hardness and strength |
| Tempering | 600-800 | Air | To relieve stresses and improve toughness |
| Stabilization | 950-1050 | Air | To enhance corrosion resistance and stabilize microstructure |
The manufacturing and heat treatment processes of Duplex S31803 are critical in achieving optimal performance for industrial applications. Proper implementation of these techniques ensures high strength, corrosion resistance, and durability, making it an ideal choice for various engineering applications.
Various Types
Duplex S31803 Spool - Type A
- Diameter: 100mm, Length: 500mm
- Condition: Hot Finished
- Applications: Oil & Gas, Marine Industry
Duplex S31803 Spool - Type B
- Diameter: 150mm, Length: 600mm
- Condition: Cold Drawn
- Applications: Chemical Processing, Power Generation
Duplex S31803 Spool - Type C
- Diameter: 200mm, Length: 700mm
- Condition: Annealed
- Applications: Pulp & Paper, Water Treatment
Duplex S31803 Spool - Type D
- Diameter: 250mm, Length: 800mm
- Condition: Pickled
- Applications: Construction, Shipbuilding
Applications & Uses
- Oil & Gas Industry: Pipelines, process piping, and high-pressure fluid handling systems.
- Petrochemical & Refineries: Reactors, heat exchangers, and chemical processing units.
- Water Treatment Plants: Filtration systems, storage tanks, and corrosion-resistant piping.
- Pharmaceutical Industry: Hygienic piping, sanitary fittings, and cleanroom equipment.
- Food & Beverage: Processing lines, storage vessels, and contamination-free pipelines.
- Automobile & Engineering: Exhaust systems, structural parts, and precision components.
- Power & Energy Sector: Boilers, condensers, and turbine piping systems.
- Marine & Offshore: Shipbuilding, offshore platforms, and coastal infrastructure.
- Construction & Infrastructure: Structural frameworks, bridges, and industrial buildings.
Industries We Serve
Our stainless steel, alloy steel, and high-performance metal products are widely used across the following industries:
Latest Price List of Duplex S31803
| Material Grade | Thickness | Price (USD / Kg) | Price (INR / Kg) |
|---|---|---|---|
| Duplex S31803 | 3 mm | $3.50 – $4.00 | ₹290 – ₹330 |
| Duplex S31803 | 6 mm | $3.80 – $4.30 | ₹310 – ₹350 |
| Duplex S31803 | 10 mm | $4.00 – $4.50 | ₹330 – ₹370 |
Note: Prices are indicative and may vary based on size, quantity, raw material cost, and delivery location. Contact us for the latest quotation for Duplex S31803.
MOQ & Payment Terms
Minimum Order Quantity: 25–100 Kg depending on part size and grade.
Payment Terms: Depending On Grade and Quantity Size
Export Packaging & Shipping
- Seaworthy, fumigated wooden crates with waterproof inner lining
- Palletised packing with clear shipping marks and heat number identification
- Container stuffing supervision with loading photographs available on request
We Exported to 50+ Countries Worldwide
| Global Export Destinations | |||||
|---|---|---|---|---|---|
| United States | Canada | Mexico | United Kingdom | Germany | Netherlands |
| Italy | Spain | South Africa | Australia | India | Korea |
| United Arab Emirates | Saudi Arabia | Qatar | Kuwait | Oman | Bahrain |
| Singapore | Malaysia | Indonesia | Dubai | Riyadh | Dammam |
Our Certifications
We are a certified manufacturer and exporter, committed to strict quality control and international compliance standards. Below are our key certifications.
GST Registered
ISO 9001:2015
ISO 1002:2018
Udyam MSME Registration
Testing Process & Quality Assurance – Ragnar Metals & Tubes
At Ragnar Metals & Tubes, our testing process ensures the safety, reliability, and performance of stainless steel and alloy steel products supplied for global industrial and infrastructure projects. Each batch is verified from raw material selection to final dispatch under internationally recognized standards including ASTM, ASME, ISO, DIN, and EN.
Detects internal flaws using high-frequency sound waves
Measures yield strength, elongation, and material durability
Evaluates toughness under low-temperature and high-stress conditions
Ensures smoothness, coating quality, and visual compliance
Enhances hardness, strength, and corrosion resistance
Measures resistance to deformation and wear
Documentation & Global Compliance
- ✔ EN 10204 3.1 / 3.2 Mill Test Certificates (MTC)
- ✔ Batch-wise quality traceability and inspection records
- ✔ Third-party inspection by SGS, TUV, Bureau Veritas & Lloyd’s
- ✔ Export documentation support for customs and international shipping
Supporting supply for oil & gas, petrochemical, power generation, marine, infrastructure, and heavy engineering industries worldwide.
Related Products
Explore our full range of stainless steel and alloy steel products including pipes, tubes, fittings, flanges, sheets, plates, spools, fasteners, round bars, and special grades manufactured for industrial, infrastructure, and global export applications.
People Also Search For
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Frequently Asked Questions
About Ragnar Metals & Tubes
- ✔ Leading manufacturer, stockist, and exporter of stainless steel and alloy steel products for industrial and infrastructure projects
- ✔ ISO 9001:2015 certified quality management system ensuring consistent product reliability and compliance
- ✔ Specialized in precision pipes, tubes, fittings, flanges, sheets, plates, fasteners, and round bars
- ✔ Modern processing and testing facilities with advanced manufacturing and inspection equipment
- ✔ Custom-engineered solutions based on client drawings and technical specifications
- ✔ Full material traceability with EN 10204 3.1 / 3.2 mill test certification
- ✔ Compliance with ASTM, ASME, DIN, EN, and ISO international standards
- ✔ Trusted global supplier supporting oil & gas, petrochemical, power, marine, and heavy engineering industries