Duplex S31803 Spool exporter in Oman
Duplex S31803 Spool exporter in Oman offers high-quality duplex stainless steel spools known for their exceptional strength and corrosion resistance. Manufactured from the S31803 grade, these spools combine austenitic and ferritic steels, delivering superior performance in harsh industrial environments. Ideal for piping systems, these components meet stringent standards, ensuring durability and reliability in various applications.
The duplex stainless steel spools are engineered to withstand high pressure and aggressive chemical exposure, making them suitable for sectors such as oil and gas, petrochemical, and marine industries. Their balanced microstructure provides excellent resistance to stress corrosion cracking and pitting, which is critical for offshore and coastal installations prevalent in Oman’s industrial landscape.
Export readiness is a key feature, with all products undergoing rigorous quality control processes, including dimensional inspections, material traceability, and certification compliance according to international standards such as ASTM and ISO. Packaging is designed to protect the integrity of the spools during transit, ensuring they arrive on-site in optimal condition for immediate use.
Furthermore, the versatility of these duplex spools allows integration into complex piping systems requiring corrosion resistance and mechanical strength simultaneously. Their fabrication includes precise welding and finishing, meeting client specifications and project requirements efficiently. This makes them a preferred choice for industrial buyers seeking dependable and cost-effective solutions.
With a strong supply chain network and expertise in logistics, the exporter facilitates timely delivery across the Middle East region. Industrial buyers benefit from consistent product availability and technical support, allowing seamless project execution and maintenance. Investing in these duplex stainless steel spools ensures long-term operational efficiency and safety for critical infrastructure projects.
Lead Time
2–7 weeks depending on size
Delivery Terms
FOB, CIF, DDP
Shipping Modes
Sea / Air / Express
Why Duplex S31803 Spool exporter in Oman 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 Oman
- 2. How to Choose the Right Manufacturer
- 3.Comparison of Duplex S31803 Spool exporter in Oman
- 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 Oman
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 Oman
| 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 weldability and workability
- ✔ Superior strength and durability
- ✔ Good resistance to pitting and crevice corrosion
- ✔ High thermal conductivity
- ✔ Cost-effective solution for various industrial applications
Technical Overview of Duplex S31803
| Product | Composition | Usage | Standards |
|---|---|---|---|
| Duplex S31803 Spool | 22% Cr, 5% Ni, 3% Mo, 0.17% N | Used in oil and gas, chemical processing, and marine applications | ASTM A790, ASME SA790 |
| Duplex S31803 Pipe | 22% Cr, 5% Ni, 3% Mo, 0.17% N | Applicable in high-pressure environments and corrosive conditions | ASTM A789, ASME SA789 |
| Duplex S31803 Fittings | 22% Cr, 5% Ni, 3% Mo, 0.17% N | Ideal for connecting pipes in various industrial systems | ASTM A815, ASME SA815 |
Specifications Table
| Material | Duplex S31803 |
|---|---|
| Grades | S31803 |
| Standard | ASTM A790/A790M |
| Size Range | 1/2" to 36" (NPS) |
| Length | Up to 40 feet |
| Form | Spool |
Available Grades Table
| Product | Composition | Applications |
|---|---|---|
| Duplex S31803 | Fe, 22% Cr, 5% Ni, 3% Mo, 0.17% N | Oil and gas, chemical processing, marine applications |
| Duplex S32205 | Fe, 22% Cr, 4.5% Ni, 3% Mo, 0.17% N | High strength applications, offshore platforms, pressure vessels |
| Duplex S32750 | Fe, 25% Cr, 7% Ni, 4% Mo, 0.27% N | Seawater applications, chemical processing, pulp and paper |
| Duplex S32550 | Fe, 25% Cr, 6% Ni, 3.5% Mo, 0.3% N | Oil and gas, marine applications, heat exchangers |
| Duplex S31803 L | Fe, 22% Cr, 5% Ni, 3% Mo, 0.1% N | Food processing, pharmaceutical, low-temperature applications |
Available Sizes of Duplex S31803 (MM)
| Size (MM) | Size (MM) |
|---|---|
| 50 | 100 |
| 75 | 125 |
| 80 | 150 |
| 90 | 160 |
| 95 | 200 |
| 110 | 250 |
| 120 | 300 |
| 140 | 350 |
| 160 | 400 |
| 180 | 450 |
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) | 3.0 - 3.5 |
| Nitrogen (N) | 0.08 - 0.2 |
| Manganese (Mn) | 0.8 - 1.5 |
| Silicon (Si) | 0.5 |
| Carbon (C) | 0.03 |
Mechanical Properties of Duplex S31803
| Property | Value |
|---|---|
| Tensile Strength (MPa) | 620 |
| Yield Strength (MPa) | 450 |
| Elongation (%) | 25 |
| Hardness (HB) | 290 |
| Impact Toughness (J) | 40 |
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 |
| 600 | 100 - 300 | Solid |
| 700 | 300 - 600 | Solid |
Electrical Resistivity of Duplex S31803
| Electrical Resistivity | ||
|---|---|---|
| Value (µΩ·m) | Temperature (°C) | Treatment or Condition |
| 0.72 | 20 | As-rolled condition |
| 0.75 | 100 | |
| 0.78 | 200 | |
| 0.80 | 300 | |
| 0.82 | 400 | |
Equivalent of Duplex S31803
| Standard | Werkstoff Nr. | UNS |
|---|---|---|
| ASTM A240 | 1.4462 | S31803 |
| EN 10088-1 | X2CrNiMoN22-5-3 | S31803 |
Manufacturing Process & Heat Treatment of Duplex S31803
Annealing
Annealing of Duplex S31803 involves heating the steel to a temperature range of 1020-1100°C, followed by air cooling. This process helps to relieve internal stresses, improve ductility, and refine the microstructure, making it suitable for further processing and enhancing its corrosion resistance.
Forging
Forging of Duplex S31803 is performed at temperatures between 1050-1150°C. This process enhances the mechanical properties of the material by refining the grain structure and improving overall strength. It is essential for producing high-quality spools that can withstand demanding industrial applications.
Hardening & Tempering
| Process | Temperature Range (°C) | Quenching Medium | Purpose |
|---|---|---|---|
| Hardening | 1020-1100 | Water or Oil | To increase hardness and strength |
| Tempering | 600-800 | Air | To achieve desired toughness and reduce brittleness |
| Stress Relieving | 300-600 | Air | To alleviate residual stresses after machining |
The combination of these manufacturing and heat treatment processes ensures that Duplex S31803 spools meet the rigorous demands of various industrial applications, providing excellent mechanical properties and corrosion resistance.
Various Types
Duplex S31803 Spool 1
- Diameter: 6 inches, Length: 12 feet
- Condition: Hot Finished
- Applications: Oil & Gas, Chemical Processing
Duplex S31803 Spool 2
- Diameter: 8 inches, Length: 10 feet
- Condition: Cold Drawn
- Applications: Marine Applications, Water Treatment
Duplex S31803 Spool 3
- Diameter: 10 inches, Length: 15 feet
- Condition: Annealed
- Applications: Pulp and Paper Industry, Heat Exchangers
Duplex S31803 Spool 4
- Diameter: 12 inches, Length: 20 feet
- Condition: Pickled
- Applications: Power Generation, Desalination Plants
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 | $2.50 – $3.00 | ₹207 – ₹248 |
| Duplex S31803 | 6 mm | $2.40 – $2.90 | ₹199 – ₹241 |
| Duplex S31803 | 10 mm | $2.30 – $2.80 | ₹192 – ₹232 |
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
- Duplex S31803 Pipe Supplier in Oman
- Duplex S31803 Flange Manufacturer in Oman
- Duplex S31803 Fittings Exporter in Oman
- Duplex Steel S31803 Plate Distributor in Oman
- Duplex S31803 Bar Stockist in Oman
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