Duplex S31803 Spool supplier Riyadh
Duplex S31803 Spool supplier Riyadh offers high-quality duplex stainless steel components designed to meet the stringent demands of industrial applications. These spools, fabricated from the S31803 grade, are known for their exceptional resistance to corrosion, excellent mechanical properties, and robust performance in harsh environments. Ideal for use in piping systems, the material combines the benefits of austenitic and ferritic stainless steels, providing high strength and superior resistance to stress corrosion cracking.
The duplex S31803 alloy features a balanced microstructure with approximately 50% ferrite and 50% austenite, allowing it to perform well in aggressive media such as seawater, chemical processing fluids, and oil and gas environments. Spools made from this grade are typically used in industries where durability and longevity are critical, including petrochemical plants, desalination facilities, and power generation units. Their excellent weldability and formability facilitate seamless integration into complex piping networks.
When sourcing duplex stainless steel spools, attention to precise manufacturing standards and certifications is paramount. Suppliers in Riyadh ensure that these components comply with international standards such as ASTM A790 and ISO 9001, guaranteeing material traceability and quality assurance. The spools are produced with strict dimensional tolerances and undergo rigorous inspection processes to meet the expectations of demanding industrial projects.
Export readiness is a key consideration for industrial buyers looking for duplex S31803 piping solutions. Suppliers in Riyadh are equipped to handle large-scale orders with efficient packaging, documentation, and timely delivery to global destinations. Their expertise in logistics and compliance with export regulations ensures seamless supply chain operations, making them reliable partners for international clients requiring durable and corrosion-resistant spools.
In summary, duplex S31803 spools from Riyadh represent a dependable choice for industries requiring high-performance stainless steel piping components. Their superior mechanical properties, resistance to harsh environments, and adherence to quality standards make them suitable for critical infrastructure projects worldwide. Partnering with a reputable supplier in this region ensures access to premium materials engineered for long-term operational success.
Lead Time
2–7 weeks depending on size
Delivery Terms
FOB, CIF, DDP
Shipping Modes
Sea / Air / Express
Why Duplex S31803 Spool supplier Riyadh 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 supplier Riyadh
- 2. How to Choose the Right Manufacturer
- 3.Comparison of Duplex S31803 Spool supplier Riyadh
- 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 supplier Riyadh
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 supplier Riyadh
| 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
- ✔ High resistance to stress corrosion cracking
- ✔ Excellent tensile strength and toughness
- ✔ Good weldability for various applications
- ✔ Superior pitting and crevice corrosion resistance
- ✔ Suitable for high-temperature applications
- ✔ Cost-effective solution for a wide range of industries
Technical Overview of Duplex S31803
| Product | Composition | Usage | Standards |
|---|---|---|---|
| Duplex S31803 Spool | 22% Cr, 5% Ni, 3% Mo, 0.17% N | Suitable for high strength and corrosion resistance applications, particularly in oil and gas industries. | ASTM A790, ASME SA790 |
| Duplex S31803 Spool | 22% Cr, 5% Ni, 3% Mo, 0.17% N | Used in pipelines, heat exchangers, and pressure vessels. | EN 10216-5, ISO 15156 |
| Duplex S31803 Spool | 22% Cr, 5% Ni, 3% Mo, 0.17% N | Recommended for environments with chloride-induced stress corrosion cracking. | API 5L, NACE MR0175 |
Specifications Table
| Material | Duplex S31803 |
|---|---|
| Grades | S31803 |
| Standard | ASTM A790 / A928 |
| Size Range | 1" to 24" (inches) |
| Length | Up to 12 meters |
| Form | Spool |
Available Grades Table
| Product | Composition | Applications |
|---|---|---|
| Duplex S31803 | Fe, 22% Cr, 5% Ni, 3% Mo | Oil and gas, chemical processing, marine applications |
| Duplex S32205 | Fe, 22% Cr, 5.5% Ni, 3.2% Mo | Pulp and paper, wastewater treatment, offshore platforms |
| Duplex S32750 | Fe, 25% Cr, 7% Ni, 4% Mo | Seawater applications, chemical tankers, pressure vessels |
| Duplex S31803 LDX | Fe, 21% Cr, 4.5% Ni, 2.5% Mo | Food processing, pharmaceutical industries |
| Duplex S32950 | Fe, 26% Cr, 7% Ni, 5% Mo | Desalination plants, offshore drilling, chemical storage |
Available Sizes of Duplex S31803 (MM)
| Size (MM) | Size (MM) |
|---|---|
| 25 | 50 |
| 32 | 63 |
| 40 | 76 |
| 50 | 89 |
| 63 | 102 |
| 76 | 114 |
| 89 | 127 |
| 102 | 140 |
| 114 | 159 |
| 127 | 219 |
Chemical Properties of Duplex S31803
| Element | Composition (%) |
|---|---|
| Chromium (Cr) | 22.0 - 24.0 |
| Nickel (Ni) | 4.5 - 6.5 |
| Molybdenum (Mo) | 3.0 - 5.0 |
| Iron (Fe) | Balance |
| Manganese (Mn) | 0.0 - 2.0 |
| Silicon (Si) | 0.0 - 1.0 |
| Carbon (C) | 0.0 - 0.03 |
| Phosphorus (P) | 0.0 - 0.03 |
Mechanical Properties of Duplex S31803
| Property | Value |
|---|---|
| Tensile Strength | 620 - 850 MPa |
| Yield Strength | 450 MPa Min |
| Elongation | 25% Min |
| Hardness | 280 HB Max |
| Charpy Impact (at -50°C) | ≥ 40 J |
Duplex S31803 – Physical & Thermal Properties
Density of Duplex S31803
| Property | Metric | Imperial |
|---|---|---|
| Density | 7.8 g/cm³ | 0.282 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 - 100 | Solid |
| 550 | 100 - 300 | Solid |
| 600 | 300 - 600 | Solid |
Electrical Resistivity of Duplex S31803
| Electrical Resistivity | ||
|---|---|---|
| Value (µΩ·m) | Temperature (°C) | Treatment or Condition |
| 0.77 | 20 | As-Received Condition |
| 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 10088-2 | XDUPLEX | S31803 |
Manufacturing Process & Heat Treatment of Duplex S31803
Annealing
Annealing of Duplex S31803 is performed to relieve internal stresses and enhance ductility. The process typically involves heating the material to a temperature range of 1020-1100°C, followed by a controlled cooling process. This treatment helps in achieving a uniform microstructure, improving corrosion resistance, and ensuring optimal mechanical properties.
Forging
Forging of Duplex S31803 is carried out at elevated temperatures ranging from 1100°C to 1200°C. This process enhances the material's strength and toughness by refining the grain structure. The forged components are then subjected to further processing to achieve the desired shapes and sizes, ensuring high performance in demanding applications.
Hardening & Tempering
| Process | Temperature Range (°C) | Quenching Medium | Purpose |
|---|---|---|---|
| Hardening | 1000-1100 | Oil | Increase hardness and strength |
| Tempering | 600-800 | Air | Reduce brittleness and relieve stresses |
| Solution Annealing | 1050-1100 | Water | Enhance corrosion resistance and uniformity |
The combination of these manufacturing and heat treatment processes ensures that Duplex S31803 spools exhibit superior mechanical properties and corrosion resistance, making them suitable for a wide range of industrial applications.
Various Types
Duplex S31803 Spool - Type A
- Diameter: 3 inches, Length: 12 inches
- Condition: Hot Finished
- Applications: Oil & Gas, Chemical Processing
Duplex S31803 Spool - Type B
- Diameter: 4 inches, Length: 10 inches
- Condition: Cold Drawn
- Applications: Power Generation, Desalination
Duplex S31803 Spool - Type C
- Diameter: 6 inches, Length: 15 inches
- Condition: Annealed
- Applications: Marine Applications, Pulp & Paper
Duplex S31803 Spool - Type D
- Diameter: 5 inches, Length: 20 inches
- Condition: Pickled
- Applications: Pharmaceutical Industry, Food Processing
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 Spool
| Material Grade | Thickness | Price (USD / Kg) | Price (INR / Kg) |
|---|---|---|---|
| Duplex S31803 | 3 mm | $4.50 – $5.00 | ₹375 – ₹420 |
| Duplex S31803 | 6 mm | $4.80 – $5.30 | ₹400 – ₹450 |
| Duplex S31803 | 10 mm | $5.00 – $5.50 | ₹420 – ₹470 |
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 Spool.
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.
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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